研究者詳細 - 中井　光男

写真a

ナカイ　ミツオ

中井　光男

Nakai Mitsuo

研究キーワード

超高速撮像技術
慣性核融合
レーザープラズマ相互作用
Laser-plasma interaction
Inertial Confinement fusion
High-speed imaging

研究分野

ものづくり技術（機械・電気電子・化学工学） / 電子デバイス、電子機器
エネルギー / 核融合学
エネルギー / プラズマ科学
エネルギー / プラズマ応用科学

学歴

大阪大学工学部電気工学

- 1980年
大阪大学

- 1980年
大阪大学

- 1985年
大阪大学工学研究科電気工学

- 1985年

所属学協会

日本物理学会
レーザー学会
プラズマ・核融合学会
アメリカ物理学会
日本原子力学会

2005年12月 - 現在
電気学会

2008年3月 - 現在

▼全件表示

論文

Demonstration of efficient relativistic electron acceleration by surface plasmonics with sequential target processing using high repetition lasers

Yasunobu Arikawa, Alessio Morace, Yuki Abe, Natsumi Iwata, Yasuhiko Sentoku, Akifumi Yogo, Kazuki Matsuo, Mitsuo Nakai, Hideo Nagatomo, Kunioki Mima, Hiroaki Nishimura, Shinsuke Fujioka, Ryosuke Kodama, Shunsuke Inoue, Masaki Hashida, Shuji Sakabe, Diego De Luis, Giancarlo Gatti, Marine Huault, José Antonio Pérez-Hernández, Luis Roso, Luca Volpe

Physical Review Research 5 ( 1 ) 2023年1月
Laser-Driven Neutron Generation Realizing Single-Shot Resonance Spectroscopy 査読国際共著国際誌

A. Yogo, Z. Lan, Y. Arikawa, Y. Abe, S. R. Mirfayzi, T. Wei, T. Mori, D. Golovin, T. Hayakawa, N. Iwata, S. Fujioka, M. Nakai, Y. Sentoku, K. Mima, M. Murakami, M. Koizumi, F. Ito, J. Lee, T. Takahashi, K. Hironaka, S. Kar, H. Nishimura, R. Kodama

Physical Review X 13 ( 1 ) 011011-1 - 011011-12 2023年1月
Feasibility study of laser-driven neutron sources for pharmaceutical applications

Takato Mori, Akifumi Yogo, Yasunobu Arikawa, Takehito Hayakawa, Seyed R. Mirfayzi, Zechen Lan, Tianyun Wei, Yuki Abe, Mitsuo Nakai, Kunioki Mima, Hiroaki Nishimura, Shinsuke Fujioka, Ryosuke Kodama

High Power Laser Science and Engineering 2023年

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We predict the production yield of a medical radioisotope 67Cu using 67Zn(n, p)67Cu and 68Zn(n, pn)67Cu reactions with fast neutrons provided from laser-driven neutron sources (LDNSs). The neutrons were generated by the p+9Be and d+9Be reactions with high energy ions accelerated by laser-plasma interaction. We evaluated the yield to be (3.3±0.5)×105atoms for 67Cu, corresponding to a radioactivity of 1.0±0.2 Bq, for a Zn foil sample with a single laser shot. Using a simulation with this result, we estimated 67Cu production with a high-frequency laser. The result suggests that it is possible to generate 67Cu with a radioactivity of 270 MBq using a future laser system with a frequency of 10 Hz and 10000-s radiation in a hospital.
Super-strong magnetic field-dominated ion beam dynamics in focusing plasma devices

A. Morace, Y. Abe, J. J. Honrubia, N. Iwata, Y. Arikawa, Y. Nakata, T. Johzaki, A. Yogo, Y. Sentoku, K. Mima, T. Ma, D. Mariscal, H. Sakagami, T. Norimatsu, K. Tsubakimoto, J. Kawanaka, S. Tokita, N. Miyanaga, H. Shiraga, Y. Sakawa, M. Nakai, H. Azechi, S. Fujioka, R. Kodama

Scientific Reports 12 ( 1 ) 2022年12月

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Abstract

High energy density physics is the field of physics dedicated to the study of matter and plasmas in extreme conditions of temperature, densities and pressures. It encompasses multiple disciplines such as material science, planetary science, laboratory and astrophysical plasma science. For the latter, high energy density states can be accompanied by extreme radiation environments and super-strong magnetic fields. The creation of high energy density states in the laboratory consists in concentrating/depositing large amounts of energy in a reduced mass, typically solid material sample or dense plasma, over a time shorter than the typical timescales of heat conduction and hydrodynamic expansion. Laser-generated, high current–density ion beams constitute an important tool for the creation of high energy density states in the laboratory. Focusing plasma devices, such as cone-targets are necessary in order to focus and direct these intense beams towards the heating sample or dense plasma, while protecting the proton generation foil from the harsh environments typical of an integrated high-power laser experiment. A full understanding of the ion beam dynamics in focusing devices is therefore necessary in order to properly design and interpret the numerous experiments in the field. In this work, we report a detailed investigation of large-scale, kilojoule-class laser-generated ion beam dynamics in focusing devices and we demonstrate that high-brilliance ion beams compress magnetic fields to amplitudes exceeding tens of kilo-Tesla, which in turn play a dominant role in the focusing process, resulting either in a worsening or enhancement of focusing capabilities depending on the target geometry.
NMR Spectroscopy for Proof-of-Concept Experimentation on a Polarized Laser Fusion Process

Masahiko Utsuro, Mitsuo Nakai, Hideki Kohri, Takeshi Ohta, Takumi Konno, Asako Igashira, Mamoru Fujiwara

Fusion Science and Technology 78 ( 7 ) 513 - 527 2022年10月
Predictive capability of material screening by fast neutron activation analysis using laser-driven neutron sources

Y. Abe, A. Nakao, Y. Arikawa, A. Morace, T. Mori, Z. Lan, T. Wei, S. Asano, T. Minami, Y. Kuramitsu, H. Habara, H. Shiraga, S. Fujioka, M. Nakai, A. Yogo

Review of Scientific Instruments 93 ( 9 ) 2022年9月

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Bright, short-pulsed neutron beams from laser-driven neutron sources (LANSs) provide a new perspective on material screening via fast neutron activation analysis (FNAA). FNAA is a nondestructive technique for determining material elemental composition based on nuclear excitation by fast neutron bombardment and subsequent spectral analysis of prompt γ-rays emitted by the active nuclei. Our recent experiments and simulations have shown that activation analysis can be used in practice with modest neutron fluences on the order of 105 n/cm2, which is available with current laser technology. In addition, time-resolved γ-ray measurements combined with picosecond neutron probes from LANSs are effective in mitigating the issue of spectral interference between elements, enabling highly accurate screening of complex samples containing many elements. This paper describes the predictive capability of LANS-based activation analysis based on experimental demonstrations and spectral calculations with Monte Carlo simulations.
Picosecond snapshot imaging of electric fields induced on a cone guide target designed for fast ignition scenario 査読

Binghe Shi, Akifumi Yogo, Kazuki Okamoto, Daniil Golovin, Seyed Reza Mirfayzi, Alessio Morace, Yasunobu Arikawa, Kohei Yamanoi, Yuki Abe, Masakatsu Murakami, Yanjun Gu, Kunioki Mima, Yasuhiko Sentoku, Mitsuo Nakai, Hiroyuki Nishimura, Hiroyuki Shiraga, Shinsuke Fujioka, Tomoyuki Johzaki, Akifumi Iwamoto, Hitoshi Sakagami, Ryosuke Kodama

Journal of Plasma Physics 88 ( 4 ) 905880404 2022年8月
Thermal neutron fluence measurement using a cadmium differential method at the laser-driven neutron source

Takato Mori, Akifumi Yogo, Takehito Hayakawa, Seyed R. Mirfayzi, Zechen Lan, Tianyun Wei, Yuki Abe, Yasunobu Arikawa, Mitsuo Nakai, Kunioki Mima, Hiroaki Nishimura, Shinsuke Fujioka, Ryosuke Kodama

Journal of Physics G: Nuclear and Particle Physics 49 ( 6 ) 2022年6月

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We produced high-energy neutrons by p + Be and d + Be reactions with protons and deuterons with continuous energies of up to 30 and 10 MeV/u, respectively, provided from laser-plasma interactions. Thermal neutrons were subsequently generated through deceleration by a small moderator with conjunction on the Be target. Here, we report the measurements on the thermal neutron fluence using the activation method with/without Cd filters. The unstable isotopes of 198Au, 56Mn, 60Co, and 181Hf were produced through (n, γ) reactions by a single laser shot. The nuclear reaction fractions were evaluated by measuring the γ-rays emitted from these unstable isotopes. The thermal neutron fluences from the four nuclides are consistent within their experimental uncertainties. The fluence is evaluated to be (2.2 ± 0.4) × 105 neutrons cm-2 at the distance of approximately 9 mm at 90° against the laser axis. The present result shows that the method to generate thermal neutrons from a compact neutron source with a diameter of 44 mm and length of 46 mm is expected to be a useful tool for various nuclear experiments and applications.
Non-destructive inspection of water or high-pressure hydrogen gas in metal pipes by the flash of neutrons and x rays generated by laser

Tianyun Wei, Akifumi Yogo, Takehito Hayakawa, Yasunobu Arikawa, Yuki Abe, Maiko Nakanishi, Seyed Reza Mirfayzi, Zechen Lan, Takato Mori, Kunioki Mima, Shinsuke Fujioka, Masakatsu Murakami, Mitsuo Nakai, Hiroaki Nishimura, Satyabrata Kar, Ryosuke Kodama

AIP Advances 12 ( 4 ) 045220 - 045220 2022年4月

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The thermal and epithermal neutrons are powerful probes to inspect water or high-pressure hydrogen gas because of their large scattering cross-sections with protons. Laser-driven neutron source, which is able to simultaneously emit different types of radiations such as x rays, can be used for neutron and x-ray radiography in the same laser shot. In this paper, we report the demonstration of non-destructive inspection for H2O contained within a stainless steel pipe using a laser-driven thermal neutron source, where water and stainless containers are detected by neutrons and x rays, respectively. The simulation result indicates that this method can also provide the capability to measure the hydrogen density in high-pressure hydrogen gas in metal containers.
Author Correction: Proof-of-principle experiment for laser-driven cold neutron source (Scientific Reports, (2020), 10, 1, (20157), 10.1038/s41598-020-77086-y)

S. R. Mirfayzi, A. Yogo, Z. Lan, T. Ishimoto, A. Iwamoto, M. Nagata, M. Nakai, Y. Arikawa, Y. Abe, D. Golovin, Y. Honoki, T. Mori, K. Okamoto, S. Shokita, D. Neely, S. Fujioka, K. Mima, H. Nishimura, S. Kar, R. Kodama

Scientific Reports 11 ( 1 ) 2021年12月

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The original version of this Article contained errors. In Figure 3b, where “Deutron” now reads: “Deuteron” In addition, in Figure 4d, where the x-axis “10–4, 10– 3, 10– 2, 10– 1, 10, 102, 103” now reads: “10–4, 10– 3, 10– 2, 10– 1, 1, 101, 102” The original Figures 3 and 4 and accompanying legends appear below. Finally, the Author Contributions section, “The moderator and experiment was developed by S.R.M. with support from A.I. and funded by A.Y. to and led by S.R.M. S.R.M., A.Y., Z.L. and T.I. executed the experiment with support from, AI, KM, MNag, MNak, YAr, YAb, D.G., Y.H., T.M., S.S. and K.O. contributed both to the experimental setup and diagnostics. S.R.M. and Z.L., T.I. performed data analysis.” now reads: “The moderator and experiment were developed by S.R.M. with support from A.I. The experiment funded by A.Y. and led by S.R.M. S.R.M., A.Y., Z.L. and T.I. executed the experiment with support from A.I., K.M., M.Nag, M.Nak, Y.Ar., Y.Ab., D.G., Y.H., T.M., S.S. and K. contributed both to the experimental setup and diagnostics. S.R.M., Z.L. and T.I. performed the data analysis. The manuscript was prepared by S.R.M., D.N., S.F., K.M., H.N., S.K. and R.K. were involved in discussions and preparation.” The original Article has been corrected. (Figure presented.).
Preliminary Cryogenic Layering by the Infrared Heating Method Modified with Cone Temperature Control for the Polystyrene Shell FIREX Target

Keisuke IWANO, Akifumi IWAMOTO, Kohei YAMANOI, Yasunobu ARIKAWA, Hideo NAGATOMO, Mitsuo NAKAI, Takayoshi NORIMATSU

Plasma and Fusion Research 16 1404099 - 1404099 2021年11月
Single shot radiography by a bright source of laser-driven thermal neutrons and x-rays

Akifumi Yogo, Seyed Reza Mirfayzi, Yasunobu Arikawa, Yuki Abe, Tianyun Wei, Takato Mori, Zechen Lan, Yuki Hoonoki, Daniil O. Golovin, Keisuke Koga, Yosuke Suzuki, Masato Kanasaki, Shinsuke Fujioka, Mitsuo Nakai, Takehito Hayakawa, Kunioki Mima, Hiroaki Nishimura, Satyabrata Kar, Ryosuke Kodama

APPLIED PHYSICS EXPRESS 14 ( 10 ) 2021年10月

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Thermal neutron (similar to 25 meV) beam is a powerful tool for investigating the structure and properties of materials used in science and technology. A laser-driven neutron source generating 10(10) neutrons within 1 ns duration is utilized to a single shot radiography with a dual beam of thermal neutrons and X-rays. As a proof of principle, we show the non-destructive inspection of hazardous substances (Cadmium) contained in a typical battery, when the cadmium anode thickness is evaluated from the transmittance of thermal neutrons. The fact that the neutron inspection above is performed with a single laser shot, i.e. with a single bunch of neutrons leads to a safer neutron source that is optically controlled on/off, and provides a novel tool for science and engineering.
Direct evaluation of high neutron density environment using reaction induced by laser-driven neutron source

Takato Mori, Akifumi Yogo, Takehito Hayakawa, Seyed R. Mirfayzi, Zechen Lan, Yuki Abe, Yasunobu Arikawa, Daniil Golovin, Tianyun Wei, Yuki Honoki, Mitsuo Nakai, Kunioki Mima, Hiroaki Nishimura, Shinsuke Fujioka, Ryosuke Kodama

Physical Review C 104 ( 1 ) 2021年7月

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We demonstrate that reactions are induced by a high-flux pulse of fast neutrons ( neutrons in ) provided from a laser-driven neutron source (LDNS). The maximum energy of the broadband neutrons reaches a few tens MeV. Several kinds of metal targets are exposed to the fast neutrons. As a result, unstable isotopes, such as , and are produced by reactions and , and are produced by reactions. We evaluate the neutron fluence and energy spectrum using the activation method in conjunction with a time-of-flight measurement. The neutron fluence is determined to be in the energy range from approximately 8 to 20 MeV at 8-mm downstream of the neutron source. The present scheme provides a method to evaluate high-density neutrons seen in stellar environments, which are expected to be generated from future LDNSs.
Dosimetric calibration of GafChromic HD-V2, MD-V3, and EBT3 films for dose ranges up to 100 kGy

Y. Abe, A. Morace, Y. Arikawa, S. R. Mirfayzi, D. Golovin, K. F.F. Law, S. Fujioka, A. Yogo, M. Nakai

Review of Scientific Instruments 92 ( 6 ) 2021年6月

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A dosimetric calibration of three types of radiochromic films (GafChromicTM HD-V2, MD-V3, and EBT3) was carried out for absorbed doses (D) ranging up to 100 kGy using a 130 TBqhttp://www.w3.org/1998/Math/MathML
Surface structure on diamond foils generated by spatially nonuniform laser irradiation 査読

Hiroki Kato, Hideo Nagatomo, Mitsuo Nakai, Tatsuhiro Sakaiya, Hidenori Terasaki, Tadashi Kondo, Yoichiro Hironaka, Katsuya Shimizu, Keisuke Shigemori

Scientific Reports 10 ( 1 ) 2020年12月

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© 2020, The Author(s). Here we report on the effects of material strength factors on the generation of surface structure due to nonuniform laser irradiation. The influence of material strength on the generation of perturbation on a diamond surface subjected to nonuniform laser irradiation was experimentally investigated. Our previous investigations suggested that stiffer and denser materials reduce surface perturbation due to spatially nonuniform laser irradiation, which was reproduced well by calculations with multi-dimensional hydrodynamic simulation code. In this work, we found that local fractures due to yield strength failure are generated by high degrees of irradiation non-uniformity. A characteristic crack-like surface structure was observed, which was not reproduced by the 2D simulation code calculations at all. The 2D simulations showed that the pressure at the diamond surface locally exceeds the Hugoniot elastic limit due to nonuniform irradiation, implying the potential for development of surface perturbations. We also measured the areal-density distribution of perturbations for single-crystal diamond and diamond with a thin high atomic number (high-Z) coating on its surface. The experimental results imply that the combination of a stiff material and thin high-Z coating can suppress the solid-strength effects caused by large irradiation non-uniformity. The knowledge given here is applicable to inertial confinement fusion target design, laser material processing, and universal problems involving solids and high-energy-density plasmas.
Proof-of-principle experiment for laser-driven cold neutron source

S. R. Mirfayzi, A. Yogo, Z. Lan, T. Ishimoto, A. Iwamoto, M. Negata, M. Nakai, Y. Arikawa, Y. Abe, D. Golovin, Y. Honoki, T. Mori, K. Okamoto, S. Shokita, D. Neely, S. Fujioka, K. Mima, H. Nishimura, S. Kar, R. Kodama

SCIENTIFIC REPORTS 10 ( 1 ) 2020年11月

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The scientific and technical advances continue to support novel discoveries by allowing scientists to acquire new insights into the structure and properties of matter using new tools and sources. Notably, neutrons are among the most valuable sources in providing such a capability. At the Institute of Laser Engineering, Osaka, the first steps are taken towards the development of a table-top laser-driven neutron source, capable of producing a wide range of energies with high brightness and temporal resolution. By employing a pure hydrogen moderator, maintained at cryogenic temperature, a cold neutron (similar to 25 meV) flux of similar to 2 x 10(3) n/cm(2)/pulse was measured at the proximity of the moderator exit surface. The beam duration of hundreds of ns to tens of mu s is evaluated for neutron energies ranging from 100s keV down to meV via Monte-Carlo techniques. Presently, with the upcoming J-EPoCH high repetition rate laser at Osaka University, a cold neutron flux in orders of similar to 1 x 10(9) n/cm(2)/ s is expected to be delivered at the moderator in a compact beamline.
Relativistic magnetic reconnection in laser laboratory for testing an emission mechanism of hard-state black hole system

K. F.F. Law, Y. Abe, A. Morace, Y. Arikawa, S. Sakata, S. Lee, K. Matsuo, H. Morita, Y. Ochiai, C. Liu, A. Yogo, K. Okamoto, D. Golovin, M. Ehret, T. Ozaki, M. Nakai, Y. Sentoku, J. J. Santos, E. D'Humières, Ph Korneev, S. Fujioka

Physical Review E 102 ( 3 ) 2020年9月

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Magnetic reconnection in a relativistic electron magnetization regime was observed in a laboratory plasma produced by a high-intensity, large energy, picoseconds laser pulse. Magnetic reconnection conditions realized with a laser-driven several kilotesla magnetic field is comparable to that in the accretion disk corona of black hole systems, i.e., Cygnus X-1. We observed particle energy distributions of reconnection outflow jets, which possess a power-law component in a high-energy range. The hardness of the observed spectra could explain the hard-state x-ray emission from accreting black hole systems.
Monte Carlo particle collision model for qualitative analysis of neutron energy spectra from anisotropic inertial confinement fusion 査読

Y. Abe, T. Johzaki, A. Sunahara, Y. Arikawa, T. Ozaki, K. Ishii, R. Hanayama, S. Okihara, E. Miura, O. Komeda, S. Sakata, K. Matsuo, H. Morita, R. Takizawa, R. Mizutani, A. Iwamoto, H. Sakagami, Y. Sentoku, H. Shiraga, M. Nakai, S. Fujioka, Y. Mori, Y. Kitagawa

High Energy Density Physics 36 2020年8月

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© 2020 Elsevier B.V. A Monte Carlo (MC) code simulating the kinetics of two-particle collisions has shown to have certain advantages in the spectral analysis of neutrons from fast-ignition inertial confinement fusion (ICF). The MC code quickly displays neutron spectra produced in the expected fusion plasma kinetics (incl. ion energy spectrum, anisotropy, and collision geometry). This allows to explore various potential mechanisms of neutron production without using time-consuming hydrodynamic or particle simulations and makes it possible to give a feedback to ongoing experiments. The validity of this model was demonstrated in the ”cone-free-shell” fast ignition experiment at the GEKKO-XII - LFEX laser facility, where the model provided a clear explanation for the significant spectral modulation of D(d, n)3He neutrons generated through the interaction between a high-power laser and a long-scale plasma.
The avalanche image intensifier panel for fast neutron radiography by using laser-driven neutron sources

R. Mizutani, Y. Abe, Y. Arikawa, J. Nishibata, A. Yogo, S. R. Mirfayzi, H. Nishimura, K. Mima, S. Fujioka, M. Nakai, H. Shiraga, R. Kodama

High Energy Density Physics 36 2020年8月

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© 2020 Elsevier B.V. Laser-driven neutrons have been expected as an optimum source for neutron radiography applications. Since the neutron fluence is lower than that of accelerator-based neutron source a new device for amplifying scintillation light has been required. The avalanche image intensifier panel discussed here has a large aperture and fast response which has been developed specifically for laser-driven neutron radiography applications. The gain uniformity for pulsed light sources was improved by optimizing electrical circuit. The performances of the improved image intensifier panel were experimentally evaluated. With the improved circuit, the gain non-uniformity was σ=5% and impulse response was 50 ns in full width half maximum (FWHM), and dynamic range was 100 which is invariable for a light pulse duration from 15 ns to 500 ns. Laser-driven neutron radiography has been successfully demonstrated in spite of the low neutron flux.
The conceptual design of 1-ps time resolution neutron detector for fusion reaction history measurement at OMEGA and the National Ignition Facility 査読

Yasunobu Arikawa, Masato Ota, Makoto Nakajima, Tomoki Shimizu, Sadashi Segawa, Thanh Nhat Khoa Phan, Youichi Sakawa, Yuki Abe, Alessio Morace, Seyed Reza Mirfayzi, Akifumi Yogo, Shinsuke Fujioka, Mitsuo Nakai, Hiroyuki Shiraga, Hiroshi Azechi, Ryosuke Kodama, Koichi Kan, Johan Frenje, Maria Gatu Johnson, Arijit Bose, Neel V. Kabadi, Graeme D. Sutcliffe, Patrick Adrian, Chikang Li, Fredrick H. Séguin, Richard Petrasso

The Review of scientific instruments 91 ( 6 ) 063304 2020年6月

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The nuclear burn history provides critical information about the dynamics of the hot-spot formation and high-density fuel-shell assembly of an Inertial Confinement Fusion (ICF) implosion, as well as information on the impact of alpha heating, and a multitude of implosion failure mechanisms. Having this information is critical for assessing the energy-confinement time τE and performance of an implosion. As the confinement time of an ICF implosion is a few tens of picoseconds, less than 10-ps time resolution is required for an accurate measurement of the nuclear burn history. In this study, we propose a novel 1-ps time-resolution detection scheme based on the Pockels effect. In particular, a conceptual design for the experiment on the National Ignition Facility and OMEGA are elaborated upon herein. A small organic Pockels crystal "DAST" is designed to be positioned ∼5 mm from the ICF implosion, which is scanned by a chirped pulse generated by a femto-second laser transmitted through a polarization-maintained optical fiber. The originally linearly polarized laser is changed to an elliptically polarized laser by the Pockels crystal when exposed to neutrons, and the modulation of the polarization will be analyzed. Our study using 35-MeV electrons showed that the system impulse response is 0.6 ps. The response time is orders of magnitude shorter than current systems. Through measurements of the nuclear burn history with unprecedented time resolution, this system will help for a better understanding of the dynamics of the hot-spot formation, high-density fuel-shell assembly, and the physics of thermonuclear burn wave propagation.
Development of Tritium Tracer Doped Liquid Fuel Target for Inertial Confinement Fusion at the Gekko XII-LFEX Facility

Yasunobu Arikawa, Yuki Iwasa, Kohei Yamanoi, Keisuke Iwano, Shinsuke Fujioka, Akifumi Iwamoto, Mitsuo Nakai, Yuji Hatano, Masanori Hara, Satoshi Akamaru, Takayoshi Norimatsu, Ryosuke Kodama

Fusion Science and Technology 76 ( 4 ) 464 - 470 2020年5月

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© 2020, © 2020 American Nuclear Society. In inertial confinement fusion (ICF), a fuel target containing deuterium and tritium is used. In recent ICF experiments on the Gekko XII LFEX facility at the Institute of Laser Engineering at Osaka University (ILE-Osaka), a target comprised of a polystyrene capsule filled with D2O liquid and a solution of X-ray tracer materials, such as copper, titanium, or chlorine, was developed. In this study, an additional T2O doping technique by which tritium can be mixed uniformly has been developed. The T2O is synthesized by T2 gas using a CuO oxidation catalyst. The T2O is agglutinated by cold trap and transferred to a target cell in which a D2O-solution-filled target is placed. Because polystyrene is slightly permeable for T2O and D2O, D2O is exchanged by T2O and completely mixed. Thus, a uniform tritium-doped ICF target with various materials can be fabricated. The T2O synthesizing and doping system is developed and tested using H2 as a cold run. The H2O is successfully doped to a D2O prefilled target at approximately 50% doping. This scheme will be utilized in future fast ignition experiments at ILE-Osaka.
Production of relativistic electrons at subrelativistic laser intensities

G. J. Williams, A. Link, M. Sherlock, D. A. Alessi, M. Bowers, A. Conder, P. Di Nicola, G. Fiksel, F. Fiuza, M. Hamamoto, M. R. Hermann, S. Herriot, D. Homoelle, W. Hsing, E. d'Humières, D. Kalantar, A. Kemp, S. Kerr, J. Kim, K. N. LaFortune, J. Lawson, R. Lowe-Webb, T. Ma, D. A. Mariscal, D. Martinez, M. J.-E. Manuel, M. Nakai, L. Pelz, M. Prantil, B. Remington, R. Sigurdsson, C. Widmayer, W. Williams, L. Willingale, R. Zacharias, K. Youngblood, Hui Chen

Physical Review E 101 ( 3 ) 2020年3月
Petapascal Pressure Driven by Fast Isochoric Heating with a Multipicosecond Intense Laser Pulse 査読

Physical Review Letters 20 ( 124 ) 035001-1 - 035001-5 2020年1月
Electromagnetic field growth triggering super-ponderomotive electron acceleration during multi-picosecond laser-plasma interaction

Sadaoki Kojima, Masayasu Hata, Natsumi Iwata, Yasunobu Arikawa, Alessio Morace, Shohei Sakata, Seungho Lee, Kazuki Matsuo, King Fai, Farley Law, Hiroki Morita, Yugo Ochiai, Akifumi Yogo, Hideo Nagatomo, Tetsuo Ozaki, Tomoyuki Johzaki, Atsushi Sunahara, Hitoshi Sakagami, Zhe Zhang, Shota Tosaki, Yuki Abe, Junji Kawanaka, Shigeki Tokita, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Hiroshi Azechi, Yasuhiko Sentoku, Shinsuke Fujioka

Communications Physics 2 ( 1 ) 2019年12月

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© 2019, The Author(s). The dependence of the mean kinetic energy of laser-accelerated relativistic electrons (REs) on the laser intensity, so-called ponderomotive scaling, explains well the experimental results to date; however, this scaling is no longer applicable to multi-picosecond (multi-ps) laser experiments. Here, the production of REs was experimentally investigated via multi-ps relativistic laser–plasma-interaction (LPI). The lower slope temperature shows little dependence on the pulse duration and is close to the ponderomotive scaling value, while the higher slope temperature appears to be affected by the pulse duration. The higher slope temperature is far beyond the ponderomotive scaling value, which indicates super-ponderomotive REs (SP-REs). Simulation and experimental evidence are provided to indicate that the SP-REs are produced by LPI in an under-critical plasma, where a large quasi-static electromagnetic field grows rapidly after a threshold timing during multi-ps LPI.
Enhancing laser beam performance by interfering intense laser beamlets 査読

A. Morace, N. Iwata, Y. Sentoku, K. Mima, Y. Arikawa, A. Yogo, A. Andreev, S. Tosaki, X. Vaisseau, Y. Abe, S. Kojima, S. Sakata, M. Hata, S. Lee, K. Matsuo, N. Kamitsukasa, T. Norimatsu, J. Kawanaka, S. Tokita, N. Miyanaga, H. Shiraga, Y. Sakawa, M. Nakai, H. Nishimura, H. Azechi, S. Fujioka, R. Kodama

Nature Communicons 10 ( 1 ) 2995 2019年7月
A large-aperture high-sensitivity avalanche image intensifier panel

Y. Arikawa, S. Matsubara, H. Kishimoto, Y. Abe, S. Sakata, A. Morace, R. Mizutani, J. Nishibata, A. Yogo, M. Nakai, H. Shiraga, H. Nishimura, S. Fujioka, R. Kodama

Review of Scientific Instruments 89 ( 10 ) 2018年10月

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© 2018 Author(s). A large-aperture high-sensitivity image intensifier panel that consists of an avalanche photodiode array and a light-emitting diode array is presented. The device has 40% quantum efficiency, over 104 optical gain, and 80-ns time resolution. The aperture size of the device is 20 cm, and with the current manufacturing process, it can be scaled to arbitrarily larger sizes. The device can intensify the light from a single particle scintillation emission to an eye-visible bright flash. The image resolution of the device is currently limited by the size of the avalanche photodiode that is 2 mm, although it can be scaled to smaller sizes in the near future. The image intensifier is operated at a small voltage, typically +57 V. The device can be applied to various applications, such as scintillation imaging, night vision cameras, and an image converter from non-visible light (such as infrared or ultraviolet) to visible light.
A multichannel gated neutron detector with reduced afterpulse for low-yield neutron measurements in intense hard X-ray backgrounds 査読

Y. Abe, N. Nakajima, Y. Sakaguchi, Y. Arikawa, S. R. Mirfayzi, S. Fujioka, T. Taguchi, K. Mima, A. Yogo, H. Nishimura, H. Shiraga, M. Nakai

Review of Scientific Instruments 89 ( 10 ) 2018年10月

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© 2018 Author(s). A design of multichannel gated photomultiplier tube (PMT) is presented for the 960-channel neutron time-of-flight detector at the Institute of Laser Engineering of Osaka University. This is important for the fusion science and the nuclear photonics where intense hard X-rays are generated from the interaction of ultra-short laser pulse of petawatt power density with matter. The hard X-rays often overload PMTs and cause signal-induced background noises called afterpulses, making the detection of subsequent neutrons impossible. For this reason, the PMTs are coupled with an electrical time-gating (ETG) system to avoid overloading. The ETG system disables the PMT by modulating the dynode potential during the primary X-ray flash. An after-pulsing suppression technique is demonstrated by applying a reverse bias voltage between the photocathode and the first dynode. The presented multichannel scheme provides a gate response time of 80 ns, a signal cutoff ratio of 2.5 × 102, and requires reasonably low power consumption.
Magnetized fast isochoric laser heating for efficient creation of ultra-high-energy-density states 査読

Shohei Sakata, Seungho Lee, Hiroki Morita, Tomoyuki Johzaki, Hiroshi Sawada, Yuki Iwasa, Kazuki Matsuo, King Fai Farley Law, Akira Yao, Masayasu Hata, Atsushi Sunahara, Sadaoki Kojima, Yuki Abe, Hidetaka Kishimoto, Aneez Syuhada, Takashi Shiroto, Alessio Morace, Akifumi Yogo, Natsumi Iwata, Mitsuo Nakai, Hitoshi Sakagami, Tetsuo Ozaki, Kohei Yamanoi, Takayoshi Norimatsu, Yoshiki Nakata, Shigeki Tokita, Noriaki Miyanaga, Junji Kawanaka, Hiroyuki Shiraga, Kunioki Mima, Hiroaki Nishimura, Mathieu Bailly-Grandvaux, Joao Jorge Santos, Hideo Nagatomo, Hiroshi Azechi, Ryosuke Kodama, Yasunobu Arikawa, Yasuhiko Sentoku, Shinsuke Fujioka

NATURE COMMUNICATIONS 9 2018年9月

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Fast isochoric heating of a pre-compressed plasma core with a high-intensity short-pulse laser is an attractive and alternative approach to create ultra-high-energy-density states like those found in inertial confinement fusion (ICF) ignition sparks. Laser-produced relativistic electron beam (REB) deposits a part of kinetic energy in the core, and then the heated region becomes the hot spark to trigger the ignition. However, due to the inherent large angular spread of the produced REB, only a small portion of the REB collides with the core. Here, we demonstrate a factor-of-two enhancement of laser-to-core energy coupling with the magnetized fast isochoric heating. The method employs a magnetic field of hundreds of Tesla that is applied to the transport region from the REB generation zone to the core which results in guiding the REB along the magnetic field lines to the core. This scheme may provide more efficient energy coupling compared to the conventional ICF scheme.
Effect of equation of state on laser imprinting by comparing diamond and polystyrene foils 査読

H. Kato, K. Shigemori, H. Nagatomo, M. Nakai, T. Sakaiya, T. Ueda, H. Terasaki, Y. Hironaka, K. Shimizu, H. Azechi

Physics of Plasmas 25 ( 3 ) 2018年3月

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© 2018 Author(s). We present herein a comprehensive study of how the equation of state affects laser imprinting by nonuniform laser irradiation of an inertial fusion target. It has been suggested that a stiffer and denser material would reduce laser imprinting based on the equation of motion with pressure perturbation. We examine the detailed temporal evolution of the imprint amplitude by using the two-dimensional radiation hydrodynamic simulation PINOCO-2D for diamond, which is a candidate stiff-ablator material for inertial fusion targets. The simulated laser imprinting amplitude is compared with experimental measurements of areal-density perturbations obtained by using face-on x-ray backlighting for diamond and polystyrene (PS) (the latter as a reference). The experimental results are well reproduced by the results of the PINOCO-2D simulation, which indicates that the imprinting amplitude due to nonuniform irradiation (average intensity, 4.0 × 1012 to 5.0 × 1013) differs by a factor of two to three between diamond and PS. The difference in laser imprinting is mainly related to the material density and compressibility. These parameters are key factors that determine the laser imprinting amplitude.
Whispering Gallery Effect in Relativistic Optics 査読

Y. Abe, K. F.F. Law, Ph Korneev, S. Fujioka, S. Kojima, S. H. Lee, S. Sakata, K. Matsuo, A. Oshima, A. Morace, Y. Arikawa, A. Yogo, M. Nakai, T. Norimatsu, E. d’Humières, J. J. Santos, K. Kondo, A. Sunahara, S. Gus’kov, V. Tikhonchuk

JETP Letters 107 ( 6 ) 351 - 354 2018年3月

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© 2018, Pleiades Publishing, Inc. A relativistic laser pulse, confined in a cylindrical-like target, under specific conditions may perform multiple scattering along the internal target surface. This results in the confinement of the laser light, leading to a very efficient interaction. The demonstrated propagation of the laser pulse along the curved surface is just yet another example of the “whispering gallery” effect, although nonideal due to laser–plasma coupling. In the relativistic domain its important feature is a gradual intensity decrease, leading to changes in the interaction conditions. The process may pronounce itself in plenty of physical phenomena, including very efficient electron acceleration and generation of relativistic magnetized plasma structures.
Efficient and repetitive neutron generation by double-laser-pulse driven photonuclear reaction

Yasunobu Arikawa, Yusuke Kato, Yuki Abe, Shuto Matsubara, Hidetaka Kishimoto, Nozomi Nakajima, Alessio Morace, Akifumi Yogo, Hiroaki Nishimura, Mitsuo Nakai, Shinsuke Fujioka, Hiroshi Azechi, Kunioki Mima, Shunsuke Inoue, Yoshihide Nakamiya, Kensuke Teramoto, Masaki Hashida, Shuji Sakabe

Plasma and Fusion Research 13 2018年1月

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© 2018 The Japan Society of Plasma Science and Nuclear Fusion Research. A short and high-intensity neutron pulse can be produced efficiently by using photonuclear reactions caused by Bremsstrahlung hard X-rays in a lase-irradiated high-Z target. The efficient and repetitive neutron generation was demonstrated with the combination of 1 Hz, 0.5 J, 25 fs, 5 x 1019W/cm2laser pulses and a rotating tungsten disc targe. Here we applied double laser pulse irradiation scheme to increase the neutron generation efficiency. The first low-intensity laser pulse produces a lon-scale unde-critical-density plasma on the tungsten target surface prior to the second pulse irradiatio. High energy electrons above the ponderomotive scaling value are accelerated by the second hig-intensity pulse in the preformed plasm, this results in the increment of hard X-ray photons and photonuclear neutron. 3.5 x 104neutron/pulse was obtained with optimized laser irradiation conditions.
3 × 108 D-D neutron generation by high-intensity laser irradiation onto the inner surface of spherical CD shells

Nakahiro Satoh, Takeshi Watari, Katsunobu Nishihara, Koji Matsukado, Ryo Yoshimura, Naoki Akiyama, Masaru Takagi, Toshiyuki Kawashima, Yuki Abe, Yasunobu Arikawa, Atsushi Sunahara, Yoichiro Hironaka, Keisuke Shigemori, Shinsuke Fujioka, Mitsuo Nakai, Hiroshi Azechi

Plasma and Fusion Research 13 2018年1月

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© 2019 The Japan Society of Plasma Science and Nuclear Fusion Research. 3 × 108 deuterium-deuterium (D-D) neutron generation per pulse was achieved with one-sided laser irradiation through an inlet hole of a deuterated polystyrene shell and a laser intensity of (2-3) × 1016W/cm2. X-ray pinhole camera images displayed a surprisingly uniform hot core formation at the center of the shell. Neutron time-of-flight spectra were recorded at three different angles from the laser incident axis to investigate the directional dependence. The dependence of neutron yield on laser energy, shell diameter, and inlet hole diameter is also discussed. To explain the number of the observed neutrons, a simple model, based on a central expansion of two-electron-temperature (hot and cold) plasma, is presented under assumed hot and cold electron temperature. According to this model, more than 1010 neutrons per pulse, the average amount required for many industrial applications, could be generated by using a higher intensity laser.
Plasma mirror implementation on LFEX laser for ion and fast electron fast ignition 査読

A. Morace, S. Kojima, Y. Arikawa, S. Fujioka, A. Yogo, S. Tosaki, S. Sakata, Y. Abe, S. H. Lee, K. Matsuo, A. Sagisaka, K. Kondo, A. S. Pirozhkov, T. Norimatsu, T. Jitsuno, N. Miyanaga, H. Shiraga, M. Nakai, H. Nishimura, H. Azechi

NUCLEAR FUSION 57 ( 12 ) 2017年12月

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In this work we report the successful implementation of plasma mirror (PM) technology on an LFEX laser facility at the Institute of Laser Engineering, Osaka University. The LFEX laser pulse was successfully refocused at the target chamber center (TCC) by means of a spherical plasma mirror, resulting in 5 x 10(18) W cm(-2) laser intensity, with 45% reflectivity at a laser flux of about 90 J cm(-2) on the PM. Experimental results show stable focusing and pointing of the LFEX pulse after PM refocusing. The contrast improvement was demonstrated by both cooler fast electron slope temperature distribution as well as by the ability to shoot sub-mu m plastic foils obtaining proton beams with maximum energy exceeding 20 MeV. Experimental results are qualitatively reproduced by 2D particle in cell simulations.
Production of intense, pulsed, and point-like neutron source from deuterated plastic cavity by mono-directional kilo-joule laser irradiation 査読

Y. Abe, A. Sunahara, S. Lee, T. Yanagawa, Z. Zhang, Y. Arikawa, A. Morace, T. Nagai, T. Ikenouchi, S. Tosaki, S. Kojima, S. Sakata, N. Satoh, T. Watari, K. Nishihara, T. Kawashima, A. Yogo, H. Sakagami, H. Shiraga, H. Nishimura, K. Mima, H. Azechi, T. Norimatsu, M. Nakai, S. Fujioka

APPLIED PHYSICS LETTERS 111 ( 23 ) 2017年12月

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This paper reports an experimental investigation of a scheme to produce an intense, pulsed, point-like, and quasi-monoenergy neutron source. In this scheme, the inner wall of a deuterated plastic spherical cavity is mono-directionally irradiated by a 2.4 kJ laser beam through an open-tip gold cone inserted into the cavity. The whole inner wall of the cavity is illuminated by laser light owing to multiple laser reflections, and the laser-ablated plasma stagnates near the center of the cavity, at which a several keV hot spot is generated. Thermonuclear and beam D-D fusion reactions occur in the hot spot. We have demonstrated the neutron yield exceeding 10 7 neutrons per pulse from a <100 mu m diameter hot spot with the deuterated plastic cavity and mono-directional GEKKO-XII laser irradiation. Published by AIP Publishing.
Laser-driven Neutron Source applied to Neutron Radiography 査読

Akifumi Yogo, Yasunobu Arikawa, Keisuke Koga, Yuki Abe, Yosuke Suzuki, Kazuki Okamoto, Satoshi Shokita, Daniil Golovin, Akito Matsubara, Nozomi Nakajima, Hidetaka Kishimoto, Masato Kanasaki, Mitsuo Nakai, Kunioki Mima, Ryousuke Kodama, Hiroaki Nishimura

PLASMA CONFERENCE 2017 2017年11月
Evaluation of laser-driven ion energies for fusion fast-ignition research 査読

S. Tosaki, A. Yogo, K. Koga, K. Okamoto, S. Shokita, A. Morace, Y. Arikawa, S. Fujioka, M. Nakai, H. Shiraga, H. Azechi, H. Nishimura

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS ( 10 ) 2017年10月

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We investigate laser-driven ion acceleration using kJ-class picosecond (ps) laser pulses as a fundamental study for ion-assisted fusion fast ignition, using a newly developed Thomson-parabola ion spectrometer (TPIS). The TPIS has a space-and weight-saving design, considering its use in an laser-irradiation chamber in which 12 beams of fuel implosion laser are incident, and, at the same time, demonstrates sufficient performance with its detectable range and resolution of the ion energy required for fast-ignition research. As a fundamental study on laser-ion acceleration using a ps pulse laser, we show proton acceleration up to 40 MeV at 1 x 10(19) Wcm(-2). The energy conversion efficiency from the incident laser into protons higher than 6 MeV is 4.6%, which encourages the realization of fusion fast ignition by laser-driven ions.
Experimental Demonstration of Magnetically-Assisted Fast Ignition on GEKKO-LFEX Laser Facility

Shinsuke Fujioka, Shohei Sakata, Seungho Lee, Hiroshi Azechi, Tomoyuki Johzaki, Hideo Nagatomo, Yasuhiko Sentoku, Hiroshi Sawada, Hitoshi Sakagami, Hiroaki Nishimura, Mitsuo Nakai, Junji Kawanaka, Takayoshi Norimatsu, Hiroyuki Shiraga, Ryosuke Kodama, d Firex, Project Team

2017年9月
Multichannel gated-neutron-detector with low afterpulse rate for neutron spectroscopy in ultra-intense laser-plasma interaction experiments

Yuki Abe, Nozomi Nakajima, Yasunobu Arikawa, Alessio Morace, Naoyoshi Kamitsukasa, Shuto Matsubara, Keisuke Koga, Akifumi Yogo, Shinsuke Fujioka, Hiroaki Nishimura, Hiroshi Azechi, Mitsuo Nakai, Ryosuke Kodama

2017年9月
Second harmonics generation by LFEX laser 招待査読

Yasunobu ARIKAWA, Zhanggui HU, Yin ZHAO, Heng Tu, Feidi Fan, Sadaoki KOJIMA, Masayasu HATA, Yasuhiko SENTOKU, Hitoshi SAKAGAMI, Shohei SAKATA, Yuki ABE, Seungho LEE, King Fai, Farley LAW, Hidetaka KISHIMOTO, Hiroki MORITA, Yohei KANBAYASHI, Morace ALESSIO, Shigeki TOKITA, Junji KAWANAKA, Noriaki MIYANAGA, Masashi YOSHIMURA, Akifumi YOGO, Hiroaki NISHIMURA, Hiroshi AZECHI, Hiroyuki SHIRAGA, Mitsuo NAKAI, LFEX-group, Shinsuke FUJIOKA, Ryosuke KODAMA

2017年9月
Assessing infrared intensity using the evaporation rate of liquid hydrogen inside a cryogenic integrating sphere for laser fusion targets 査読

K. Iwano, A. Iwamoto, T. Asahina, K. Yamanoi, Y. Arikawa, H. Nagatomo, M. Nakai, T. Norimatsu, H. Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 88 ( 7 ) 2017年7月

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Infrared (IR) heating processes have been studied to form a deuterium layer in an inertial confinement fusion target. To understand the relationship between the IR intensity and the fuel layering time constant, we have developed a new method to assess the IR intensity during irradiation. In our method, a glass flask acting as a dummy target is filled with liquid hydrogen (LH2) and is then irradiated with 2-mu m light. The IR intensity is subsequently calculated from the time constant of the LH2 evaporation rate. Although LH2 evaporation is also caused by the heat inflow from the surroundings and by the background heat, the evaporation rate due to IR heating can be accurately determined by acquiring the time constant with and without irradiation. The experimentally measured IR intensity is 0.66 mW/cm(2), which agrees well with a value estimated by considering the IR photon energy balance. Our results suggest that the present method can be used to measure the IR intensity inside a cryogenic system during IR irradiation of laser fusion targets. Published by AIP Publishing.
Improvement in the heating efficiency of fast ignition inertial confinement fusion through suppression of the preformed plasma 査読

Y. Arikawa, S. Kojima, A. Morace, M. Hata, S. Sakata, S. Fujioka, T. Kawashima, Y. Hironaka, K. Shigemori, Y. Abe, Z. Zhang, X. Vaisseau, S. Lee, T. Gawa, K. Matsuo, K. F. F. Law, Y. Kato, S. Matsubara, S. Tosaki, A. Yogo, H. Nagatomo, S. Tokita, Y. Nakata, T. Jitsuno, N. Miyanaga, J. Kawanaka, Y. Fujimoto, K. Yamanoi, T. Norimatsu, M. Nakai, H. Nishimura, H. Shiraga, H. Azechi, A. Sunahara, T. Johzaki, T. Ozaki, H. Sakagami

NUCLEAR FUSION 57 ( 6 ) 2017年6月

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The study of fast electron spectrum optimization by suppression of preformed plasma in fast ignition targets is presented in this work. Integrated fast-electron spectra for electron energies below 3 MeV-the energy range responsible for core heating-are compared for different preformed plasma conditions. The pulse contrast (the ratio of peak-to-pedestal laser intensities) is compared for 10(8), 10(9) and 10(11) conditions at constant laser energy (similar to 500 J), pulse duration (2 ps), spot size (30% encircled energy on 50 mu m diameter) and laser intensity (around 1 x 10(19) W cm(-2)). The best electron spectrum optimization, consisting of maximized electron number for energies below 3 MeV was obtained with 14 mu m thick cone targets. The energy coupling efficiency from heating laser to core plasma, assuming typical core plasma parameters, was estimated to be 2%, although 0.37% was obtained with previous conditions with poor pulse contrast and a 7 mu m thick cone target.
High pressure band gap modification of LiCaAlF6 査読

Toshihiko Shimizu, Mui Viet Luong, Marilou Cadatal-Raduban, Melvin John F. Empizo, Kohei Yamanoi, Ren Arita, Yuki Minami, Nobuhiko Sarukura, Nakai Mitsuo, Hiroshi Azechi, Minh Hong Pham, Hung Dai Nguyen, Kouhei Ichiyanagi, Shunsuke Nozawa, Ryo Fukaya, Shin-ichi Adachi, Kazutaka G. Nakamura, Kentaro Fukuda, Yoshiyuki Kawazoe, Krista G. Steenbergen, Peter Schwerdtfeger

APPLIED PHYSICS LETTERS 110 ( 14 ) 2017年4月

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First-principles density functional calculations together with experimental measurements demonstrate that pressure (uniform and uniaxial) increases the band gap of a perfect lithium hexafluoroaluminate (LiCaAlF6, LiCAF) crystal. As fluoride crystals can be highly transmitting at vacuum ultraviolet wavelengths, crystal modifications that further increase the band gap are highly sought after for future Vacuum ultraviolet applications. Through an extensive series of density functional theory simulations, we demonstrate that the band gap increases monotonically from 12.2 eV to 14.1 eV with the application of uniform pressure. Through joint theoretical and experimental investigation, we explore different uniaxial compressions that can be achieved through cutting-edge laser-shock compression. We find that uniaxial pressure also increases the LiCAF band gap by 0.3 and 0.4 eV for a-and c-axis compressions, respectively. Published by AIP Publishing.
Boosting laser-ion acceleration with multi-picosecond pulses 査読

A. Yogo, K. Mima, N. Iwata, S. Tosaki, A. Morace, Y. Arikawa, S. Fujioka, T. Johzaki, Y. Sentoku, H. Nishimura, A. Sagisaka, K. Matsuo, N. Kamitsukasa, S. Kojima, H. Nagatomo, M. Nakai, H. Shiraga, M. Murakami, S. Tokita, J. Kawanaka, N. Miyanaga, K. Yamanoi, T. Norimatsu, H. Sakagami, S. V. Bulanov, K. Kondo, H. Azechi

SCIENTIFIC REPORTS 7 2017年2月

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Using one of the world most powerful laser facility, we demonstrate for the first time that high-contrast multi-picosecond pulses are advantageous for proton acceleration. By extending the pulse duration from 1.5 to 6 ps with fixed laser intensity of 10(18) W cm(-2), the maximum proton energy is improved more than twice (from 13 to 33 MeV). At the same time, laser-energy conversion efficiency into the MeV protons is enhanced with an order of magnitude, achieving 5% for protons above 6 MeV with the 6 ps pulse duration. The proton energies observed are discussed using a plasma expansion model newly developed that takes the electron temperature evolution beyond the ponderomotive energy in the over picoseconds interaction into account. The present results are quite encouraging for realizing ion-driven fast ignition and novel ion beamlines.
Large-aperture fast-neutron imaging detector with 10-ns time resolution 査読

Y. Arikawa, S. Matsubara, Y. Abe, Y. Kato, H. Kishimoto, A. Yogo, H. Nishimura, M. Nakai, H. Shiraga, S. Fujioka, H. Azechi, Y. Otake, K. Mima, Y. Honda

SELECTED PAPERS FROM THE 31ST INTERNATIONAL CONGRESS ON HIGH-SPEED IMAGING AND PHOTONICS 10328 2017年

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Fast neutrons, which are neutrons with energies greater than 1 MeV, are expected to be a source of nondestructive inspection for a large-size infrastructure such as a bridge girder because of their mean free path exceeding the meter. A neutron-imaging device with 10-ns time resolution can discriminate pulsed neutrons from X-rays via time of flight. For this purpose, we require a fast-response neutron imager with large aperture and high image resolution.
A neutron-imaging device with time resolution of 10 ns and aperture size of 40 cm x 60 cm was developed. It was filled with fast response liquid scintillator [1] in an aluminum honeycomb plate, which converts neutrons to optical light images. The scintillation light images were relayed using an optical lens and detected using a fast response image intensified CCD. The detector was tested at an electron linear accelerator (LINAC) facility in Osaka University. A short X-ray pulse (30 ps pulse duration) was generated using LINAC, and X-ray radiograph images were obtained with a 10-ns exposure time duration. The radiograph images were well attenuated within 10-ns from the X-ray injection. A high-energy X-ray image and a neutron radiograph image of a 30-cm thick concrete block with iron blocks located behind it were successfully observed. This promising technique could facilitate nondestructive inspection of large concrete constructions.
Ablation-erosion analyses of various fusion material surfaces and developments of surface erosion monitors for notification of fusion chamber maintenance times, as an example: Visible light transparent SiC and up-conversion phosphors applied to plasma facing surface structures, useful for versatile purposes to protect and diagnose fusion chambers and so on 査読

K. Kasuya, S. Motokoshi, S. Taniguchi, M. Nakai, K. Tokunaga, K. Kolacek, J. Schmidt, O. Frolov, J. Straus, J. Matejicek, A. Choukourov

XXI INTERNATIONAL SYMPOSIUM ON HIGH POWER LASER SYSTEMS AND APPLICATIONS 2016 10254 2017年

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Two kinds of pulsed lasers in Japan and Czech Republic were used to irradiate various sample materials to investigate the surface erosion thresholds under very hazardous environments including nuclear fusion chambers. The first was ArF laser in ILT and the second was XUV laser in IPP. These data were in-cooperated with our former data to build up our material strength data for our succeeding applications of various materials to a variety of fields. As an example, we proposed surface erosion monitors to notice the fusion chamber maintenance times with which the facilities can be protected from the collapses under very severe operation conditions. These kinds of monitors are expected to be useful for future different kinds of mechanical structures not only for the fusion chambers but also various chambers for many purposes. Special up-conversion phosphors are also newly proposed to be used as the candidate materials to measure the thermal inputs onto the front surfaces of the armor structures. Optical transparent SiC was also newly tested to enrich our data base for our future diagnostic and protection possibilities.
レーザー駆動プロトン計測のためのラジオクロミックフィルムの絶対値キャリブレーション査読

上司尚善, 戸崎翔太, 余語覚文, 藤乗幸子, 高久圭二, 青井考, 福田光宏, 中井光男, 白神宏之, 疇地宏, Morace A., 有川安信, 安倍勇輝, 加藤裕亮, 側貴行, 松原秋登, 中嶋希, Law F.

日本物理学会講演概要集 72 ( 0 ) 924 - 924 2017年

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レーザー駆動プロトン発生の解析にラジオクロミックフィルムが用いられている。しかしながらラジオクロミックフィルムの絶対値キャリブレーションのデータが不足していた。我々は、放射線源や加速器を用いて絶対値キャリブレーションを行った。講演では実験データ及び解析データについて述べる。
Ultrahigh-contrast kilojoule-class petawatt LFEX laser using a plasma mirror 査読

Yasunobu Arikawa, Sadaoki Kojima, Alessio Morace, Shohei Sakata, Takayuki Gawa, Yuki Taguchi, Yuki Abe, Zhe Zhang, Xavier Vaisseau, Seung Ho Lee, Kazuki Matsuo, Shota Tosaki, Masayasu Hata, Koji Kawabata, Yuhei Kawakami, Masato Ishida, Koichi Tsuji, Satoshi Matsuo, Noboru Morio, Tetsuji Kawasaki, Shigeki Tokita, Yoshiki Nakata, Takahisa Jitsuno, Noriaki Miyanaga, Junji Kawanaka, Hideo Nagatomo, Akifumi Yogo, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Shinsuke Fujioka, Hiroshi Azechi, Atsushi Sunahara, Tomoyuki Johzaki, Tetsuo Ozaki, Hitoshi Sakagami, Akito Sagisaka, Koichi Ogura, Alexander S. Pirozhkov, Masaharu Nishikino, Kiminori Kondo, Shunsuke Inoue, Kensuke Teramoto, Masaki Hashida, Shuji Sakabe

APPLIED OPTICS 55 ( 25 ) 6850 - 6857 2016年9月

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Laser pulse contrast exceeding 1011 was demonstrated on a kilojoule-class petawatt laser for fast ignition experiments (LFEX) laser system [J. Phys. IV France 133, 81 (2006)] by implementing a 2 in. plasma mirror. Laser beams of up to 1.2 kJ striking the plasma mirror with a pulse duration of 1.5 ps were reflected and focused onto a target without significant distortions in the focal spot. Transmitted light from the plasma mirror reveals that it has a high reflectivity 2 ps before the main peak. The estimated laser pulse contrast at the target was 1011 at 1 ns before the main peak. No preformed plasma was observed with optical interferometry diagnostics, but in the experiment without a plasma mirror a preplasma was clearly observed. The energetic proton was generated from a 0.1 mu m thick CH film showing excellent pulse contrast. This technique constitutes a promising method to enhance the LFEX laser system performance in fast ignition experiments. (C) 2016 Optical Society of America
Fast ignition realization experiment with high-contrast kilo-joule peta-watt LFEX laser and strong external magnetic field 査読

Shinsuke Fujioka, Yasunobu Arikawa, Sadaoki Kojima, Tomoyuki Johzaki, Hideo Nagatomo, Hiroshi Sawada, Seung Ho Lee, Takashi Shiroto, Naofumi Ohnishi, Alessio Morace, Xavier Vaisseau, Shohei Sakata, Yuki Abe, Kazuki Matsuo, King Fai Farley Law, Shota Tosaki, Akifumi Yogo, Keisuke Shigemori, Yoichiro Hironaka, Zhe Zhang, Atsushi Sunahara, Tetsuo Ozaki, Hitoshi Sakagami, Kunioki Mima, Yasushi Fujimoto, Kohei Yamanoi, Takayoshi Norimatsu, Shigeki Tokita, Yoshiki Nakata, Junji Kawanaka, Takahisa Jitsuno, Noriaki Miyanaga, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Kotaro Kondo, Mathieu Bailly-Grandvaux, Claudio Bellei, Joao Jorge Santos, Hiroshi Azechi

PHYSICS OF PLASMAS 23 ( 5 ) 2016年5月

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A petawatt laser for fast ignition experiments (LFEX) laser system [N. Miyanaga et al., J. Phys. IV France 133, 81 (2006)], which is currently capable of delivering 2 kJ in a 1.5 ps pulse using 4 laser beams, has been constructed beside the GEKKO-XII laser facility for demonstrating efficient fast heating of a dense plasma up to the ignition temperature under the auspices of the Fast Ignition Realization EXperiment (FIREX) project [H. Azechi et al., Nucl. Fusion 49, 104024 (2009)]. In the FIREX experiment, a cone is attached to a spherical target containing a fuel to prevent a corona plasma from entering the path of the intense heating LFEX laser beams. The LFEX laser beams are focused at the tip of the cone to generate a relativistic electron beam (REB), which heats a dense fuel core generated by compression of a spherical deuterized plastic target induced by the GEKKO-XII laser beams. Recent studies indicate that the current heating efficiency is only 0.4%, and three requirements to achieve higher efficiency of the fast ignition (FI) scheme with the current GEKKO and LFEX systems have been identified: (i) reduction of the high energy tail of the REB; (ii) formation of a fuel core with high areal density using a limited number (twelve) of GEKKOXII laser beams as well as a limited energy (4 kJ of 0.53-mu m light in a 1.3 ns pulse); (iii) guiding and focusing of the REB to the fuel core. Laser-plasma interactions in a long-scale plasma generate electrons that are too energetic to efficiently heat the fuel core. Three actions were taken to meet the first requirement. First, the intensity contrast of the foot pulses to the main pulses of the LFEX was improved to > 10(9). Second, a 5.5-mm-long cone was introduced to reduce pre-heating of the inner cone wall caused by illumination of the unconverted 1.053-mu m light of implosion beam (GEKKO-XII). Third, the outside of the cone wall was coated with a 40-mu m plastic layer to protect it from the pressure caused by imploding plasma. Following the above improvements, conversion of 13% of the LFEX laser energy to a low energy portion of the REB, whose slope temperature is 0.7 MeV, which is close to the ponderomotive scaling value, was achieved. To meet the second requirement, the compression of a solid spherical ball with a diameter of 200-mu m to form a dense core with an areal density of similar to 0.07 g/cm(2) was induced by a laser-driven spherically converging shock wave. Converging shock compression is more hydrodynamically stable compared to shell implosion, while a hot spot cannot be generated with a solid ball target. Solid ball compression is preferable also for compressing an external magnetic field to collimate the REB to the fuel core, due to the relatively small magnetic Reynolds number of the shock compressed region. To meet the third requirement, we have generated a strong kilo-tesla magnetic field using a laser-driven capacitor-coil target. The strength and time history of the magnetic field were characterized with proton deflectometry and a B-dot probe. Guidance of the REB using a 0.6-kT field in a planar geometry has been demonstrated at the LULI 2000 laser facility. In a realistic FI scenario, a magnetic mirror is formed between the REB generation point and the fuel core. The effects of the strong magnetic field on not only REB transport but also plasma compression were studied using numerical simulations. According to the transport calculations, the heating efficiency can be improved from 0.4% to 4% by the GEKKO and LFEX laser system by meeting the three requirements described above. This efficiency is scalable to 10% of the heating efficiency by increasing the areal density of the fuel core. Published by AIP Publishing.
Development of Compton X-ray spectrometer for high energy resolution single-shot high-flux hard X-ray spectroscopy 査読

Sadaoki Kojima, Takahito Ikenouchi, Yasunobu Arikawa, Shohei Sakata, Zhe Zhang, Yuki Abe, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Tetsuo Ozaki, Shuji Miyamoto, Masashi Yamaguchi, Akinori Takemoto, Shinsuke Fujioka, Hiroshi Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 87 ( 4 ) 2016年4月

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Hard X-ray spectroscopy is an essential diagnostics used to understand physical processes that take place in high energy density plasmas produced by intense laser-plasma interactions. A bundle of hard X-ray detectors, of which the responses have different energy thresholds, is used as a conventional single-shot spectrometer for high-flux (>10(13) photons/shot) hard X-rays. However, high energy resolution (Delta hv/hv < 0.1) is not achievable with a differential energy threshold (DET) X-ray spectrometer because its energy resolution is limited by energy differences between the response thresholds. Experimental demonstration of a Compton X-ray spectrometer has already been performed for obtaining higher energy resolution than that of DET spectrometers. In this paper, we describe design details of the Compton X-ray spectrometer, especially dependence of energy resolution and absolute response on photon-electron converter design and its background reduction scheme, and also its application to the laser-plasma interaction experiment. The developed spectrometer was used for spectroscopy of bremsstrahlung X-rays generated by intense laser-plasma interactions using a 200 mu m thickness SiO2 converter. The X-ray spectrum obtained with the Compton X-ray spectrometer is consistent with that obtained with a DET X-ray spectrometer, furthermore higher certainly of a spectral intensity is obtained with the Compton X-ray spectrometer than that with the DET X-ray spectrometer in the photon energy range above 5 MeV. (C) 2016 AIP Publishing LLC.
21aCB-3 高速点火核融合実験における追加熱レーザーの後方散乱光によるエネルギー吸収率の評価

側貴行, 有川安信, 小島完興, Morace Alessio, 坂田匠平, 安部勇輝, 松尾一輝, 戸崎翔太, Law Farley King Fai, 余語覚文, 藤岡慎介, 西村博明, 中井光男, 尾崎哲, 疇地宏

日本物理学会講演概要集 71 914 - 914 2016年
Cool-down performance of the new apparatus for fuel layering demonstrations of FIREX targets 査読

A. Iwamoto, T. Norimatsu, M. Nakai, H. Sakagami, H. Shiraga, H. Azechi

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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FIREX targets have been developed under two layering strategies: foam shell and cone guide laser heating methods. Basic studies have been conducted by the collaboration research between ILE and NIFS. Then the next stage requires the characterization of a layered solid fuel. The present system is at the disadvantage of optical observations. Therefore, a new apparatus is designed to solve it. Glass windows with a wide aperture are installed for an interferometer and a microscope. To isolate the vibration from a cryocooler, active vibration control units are equipped, and flexible thermal conductive links are utilized. Furthermore, a quick target exchange mechanism is applied to deal with different types of FIREX targets. A target holder is detachable from a main vacuum chamber. A metal gasket with not fixing bolts but a load of similar to thousand newtons on ensures GHe leak tightness for target cooling. Eventually, the design temperature of 10.00 K at a target container has been achieved. The cool-down performance indecates that the new apparatus provides a cryogenic environment for fuel layering demonstrations.
22aCB-6 LFEXを用いたレーザー駆動中性子発生実験

加藤裕亮, 有川安信, 安部勇輝, 松原秋登, Morace Alessio, 余語覚文, 中井光男, 西村博明, 疇地宏

日本物理学会講演概要集 71 983 - 983 2016年
21pAP-5 プレプラズマが高強度レーザー生成高速電子のエネルギー分布及び発生効率に与える影響II

小島完興, 有川安信, 畑昌育, 藤岡慎介, Morace Alessio, Vaisseau Xavier, 坂田匠平, 匂坂明人, 余語覚文, 戸崎翔太, 池之内孝仁, 尾崎哲, 安部勇輝, 李昇浩, 側貴行, 田口雄基, 松尾一輝, 小倉浩一, Pirozhkov Alexander, 錦野将元, 近藤公伯, 城崎知至, 砂原淳, 坂上仁志, Zhe Zhang, 長友英夫, 西村博明, 白神宏之, 中井光男, 疇地宏, GEKKO& LFEX Team

日本物理学会講演概要集 71 593 - 593 2016年
21aCB-4 燃料球内面照射型高速点火の数値シミュレーション

砂原淳, 安部勇輝, 李昇浩, 尾崎哲, 城崎知至, 長友英夫, 有川安信, 藤岡慎介, 坂上仁志, 中井光男, 白神宏之, 乗松孝好, 疇地宏

日本物理学会講演概要集 71 915 - 915 2016年
Electron transport estimated from electron spectra using electron spectrometer in LFEX laser target experiments 査読

T. Ozaki, M. Hata, K. Matsuo, S. Kojima, Y. Arikawa, S. Fujioka, H. Sakagami, A. Sunahara, H. Nagatomo, T. Johzaki, A. Yogo, A. Morace, Z. Zhang, H. Shiraga, S. Sakata, T. Nagai, Y. Abe, S. Lee, M. Nakai, H. Nishimura, H. Azechi

9TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2015) 717 2016年

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Hot electrons which are generated from targets irradiated by a high-intense laser are measured by two electron spectrometers (ESMs). However, total electron energy observed by the ESM is only less than 1 %. Hot electrons are confined by self-fields due to the huge current. When an external magnetic field of several hundred Tesla is applied during the laser irradiation on targets, the ESM signals always increase. In the simulation, the same result can be obtained. The reason is that the Alfven limit can be mitigated due to the external longitudinal magnetic field.
Experimental Test of the Polarization Persistence in Inertial Confinement Fusion 査読

J. P. Didelez, C. Deutsch, M. Fujiwara, M. Nakai, M. Utsuro

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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The complete deuteron and triton polarization in the DT fusion increases the reactivity by 50%. For Inertial Confinement Fusion (ICF), due to the dynamics of the fusion reaction process, the fusion rate could even be further increased. It has been argued that the polarization would survive as well in magnetic as in inertial confinements. Recently, we have proposed an experiment to test the persistence of the polarization in a fusion process, using a powerful laser hitting a polarized HD target. The polarized deuterons heated in the plasma induced by the laser can fuse. The corresponding reaction is: D + D -> He-3 + n. The angular distribution of the emitted neutrons and the change in the corresponding total cross section are signatures to estimate the polarization persistency. A proposal to test the persistence of the polarization in ICF has been accepted at ILE: the POLAF project (POlarization in LAser Fusion Process). It uses the polarized HD targets produced at RCNP and the powerful ILE lasers, as well as the neutron detectors existing there. Both institutions are on the same campus at Osaka University. The description of the POLAF experiment and of the corresponding set-up is given.
Energy distribution of fast electrons accelerated by high intensity laser pulse depending on laser pulse duration 査読

Sadaoki Kojima, Yasunobu Arikawa, Alessio Morace, Masayasu Hata, Hideo Nagatomo, Tetsuo Ozaki, Shohei Sakata, Seung Ho Lee, Kazuki Matsuo, King Fai Farley Law, Shota Tosaki, Akifumi Yogo, Tomoyuki Johzaki, Atsushi Sunahara, Hitoshi Sakagami, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Shinsuke Fujioka, Hiroshi Azechi

9TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2015) 717 2016年

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The dependence of high-energy electron generation on the pulse duration of a high intensity LFEX laser was experimentally investigated. The LFEX laser (A = 1.054 and intensity = 2.5 3 x 10(18) W/cm(2)) pulses were focused on a 1 mm(3) gold cubic block after reducing the intensities of the foot pulse and pedestal by using a plasma mirror. The full width at half maximum (FWHM) duration of the intense laser pulse could be set to either 1.2 ps or 4 ps by temporally stacking four beams of the LFEX laser, for which the slope temperature of the high-energy electron distribution was 0.7 MeV and 1.4 MeV, respectively. The slope temperature increment cannot be explained without considering pulse duration effects on fast electron generation.
Mechanical design of experimental apparatus for FIREX cryo-target cooling 査読

A. Iwamoto, T. Norimatsu, M. Nakai, H. Sakagami, S. Fujioka, H. Shiraga, H. Azechi

9TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2015) 717 2016年

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Mechanical design of an experimental apparatus for FIREX cryo-target cooling is described. Gaseous helium (GHe) sealing system at a cryogenic environment is an important issue for laser fusion experiments. The dedicated loading system was designed for a metal gasket. We take U-TIGHTSEAL((R)) (Usui Kokusai Sangyo Kaisha. Ltd.) with an indium plated copper jacket as an example. According to its specification, a linear load of 110 N/m along its circumference is the optimum compression; however a lower load would still maintain helium (He) leak below the required level. Its sealing performance was investigated systematically. Our system demanded 27 N/mm of the load to keep He leak tightness in a cryogenic environment. Once leak tightness was obtained, it could be reduced to 9.5 N/mm.
Mitigation of Laser Imprinting with Diamond Ablator for Direct-Drive Inertial Confinement Fusion Targets 査読

K. Shigemori, H. Kato, M. Nakai, R. Hosogi, T. Sakaiya, H. Terasaki, S. Fujioka, A. Sunahara, H. Azechi

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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We propose a novel scheme to mitigate the initial perturbation imprinting due to irradiation non-uniformity. Diamond was potential candidate for the ablator material for ICF targets due to its stiffness. The stiffness is very important parameter for imprint mitigation because the laser imprint is primary as a function of pressure perturbation due to lase irradiation non-uniformity. We measured the imprint amplitude of diamond foils and plastic (CH) foils. The experimental data suggest the initial imprinting is drastically mitigated for the diamond foils.
Progress Towards a Laser Produced Relativistic Electron-Positron Pair Plasma 査読

Hui Chen, J. Bonlie, R. Cauble, F. Fiuza, W. Goldstein, A. Hazi, C. Keane, A. Link, E. Marley, S. R. Nagel, J. Park, R. Shepherd, G. J. Williams, D. D. Meyerhofer, G. Fiksel, D. Barnak, P. Y. Chang, M. Nakai, Y. Arikawa, H. Azechi, S. Fujioka, S. Kojima, N. Miyanaga, T. Morita, T. Nagai, H. Nishimura, T. Ozaki, Y. Sakawa, H. Takabe, Z. Zhang, S. Kerr, R. Fedosejevs, Y. Sentoku, M. P. Hill, D. J. Hoarty, L. M. R. Hobbs, S. F. James

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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A set of experiments has been performed exploring unique characteristics of pair jets and plasmas at several energetic short-pulse laser facilities including Titan at Livermore and OMEGA EP in Rochester, as well as the Osaka LFEX and AWE Orion lasers. New results are summarized, including positron beam emittance, scaling of pair production vs. laser energy, and initial results on the pair jet collimation using electromagnetic fields.
Quantitative K alpha line spectroscopy for energy transport in ultra-intense laser plasma interaction 査読

Z. Zhang, H. Nishimura, S. Fujioka, Y. Arikawa, M. Nakai, H. Chen, J. Park, G. J. Williams, T. Ozaki, H. Shiraga, S. Kojima, T. Johzaki, A. Sunahara, N. Miyanaga, J. Kawanaka, Y. Nakata, T. Jitsuno, H. Azechi

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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Absolute Ka line spectroscopy is proposed for studying laser-plasma interactions taking place in the cone-guided fast ignition targets. X-ray spectra ranging from 20 to 100 keV were quantitatively measured with a Laue spectrometer. The absolute sensitivities of the Laue spectrometer system were calibrated using pre-characterized laser-produced x-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an open code for x-ray diffraction. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer agency, is derived as a consequence of this work. The absolute yield of Au and Ta Ka lines were measured in the fast ignition experimental campaign performed at Institute of Laser Engineering, Osaka University. Applying the hot electron spectrum information from the electron spectrometer, an energy transfer efficiency of the incident LFEX [1], a kJ-class PW laser, to hot electrons was derived for a planar and cone-guided geometry.
The diagnostics of the energy coupling efficiency in the Fast Ignition integrated experiment 査読

Y. Arikawa, S. Fujioka, A. Morace, Z. Zhang, T. Nagai, M. Taga, Y. Abe, S. Kojima, S. Sakata, H. Inoue, M. Utsugi, S. Hattori, S. H. Lee, T. Ikenouchi, T. Hosoda, A. Sunahara, T. Ozaki, T. Johzaki, H. Nagatomo, K. Yamanoi, T. Shimizu, S. Tokita, Y. Fujimoto, J. Kawanaka, Y. Nakata, M. Nakai, H. Shiraga, H. Jitsuno, N. Sarukura, N. Miyanaga, T. Norimatsu, H. Nishimura, H. Azechi

8TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA 2013) 688 2016年

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The energy coupling efficiency (CE) in Fast Ignition (FI) laser fusion was studied at GEKKO XII and LFEX laser facility by using newly developed targets and plasma diagnostic instruments. The gated-liquid scintillator neutron detectors had been upgraded by using neutron collimators for intense background fluxes of gamma-rays and neutrons in the FI experiment. Clear fusion neutron signal was successfully recorded in the sub-kJ heating FI experiment. Up to 5 times neutron yield enhancement was observed, and the CE of the heating laser to core plasma was estimated to be 1.6 % for cone-in-shell target implosion by 9 beams and core heating by LFEX pulse 115 ps before bang time. The laser-to-electron energy conversion efficiency was separately diagnosed using a newly developed target and resulted to be 45 %. The fast electron energy spectrum was estimated to be 2.3 MeV slope temperature by hard x-ray spectroscopy. Monte Carlo simulations demonstrate the consistency of the data set.
非一様レーザー照射によるダイヤモンド表面形状の時間発展

加藤弘樹, 重森啓介, 植田 ��智, 長友英夫, 境家達弘, 寺崎英紀, 弘中陽一郎, 中井光男, 疇地宏

日本物理学会講演概要集 71 583 - 583 2016年

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直接照射型慣性核融合では不均一レーザー照射によるインプリントレベルが、点火条件を決める物理量（発生中性子数、ターゲット面密度）と関係し、重要なファクターとなっている。本研究では、ダイヤモンドとプラズマの界面に生じるインプリント擾乱の定量的評価、さらに照射強度分布と高Z表面コートの依存性について実験を行った。講演では、モデルやシミュレーションを通して観測結果に対する解釈について報告する。
Heating efficiency evaluation with mimicking plasma conditions of integrated fast-ignition experiment 査読

Shinsuke Fujioka, Tomoyuki Johzaki, Yasunobu Arikawa, Zhe Zhang, Alessio Morace, Takahito Ikenouchi, Tetsuo Ozaki, Takahiro Nagai, Yuki Abe, Sadaoki Kojima, Shohei Sakata, Hiroaki Inoue, Masaru Utsugi, Shoji Hattori, Tatsuya Hosoda, Seung Ho Lee, Keisuke Shigemori, Youichiro Hironaka, Atsushi Sunahara, Hitoshi Sakagami, Kunioki Mima, Yasushi Fujimoto, Kohei Yamanoi, Takayoshi Norimatsu, Shigeki Tokita, Yoshiki Nakata, Junji Kawanaka, Takahisa Jitsuno, Noriaki Miyanaga, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Hideo Nagatomo, Hiroshi Azechi

PHYSICAL REVIEW E 91 ( 6 ) 2015年6月

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A series of experiments were carried out to evaluate the energy-coupling efficiency from heating laser to a fuel core in the fast-ignition scheme of laser-driven inertial confinement fusion. Although the efficiency is determined by a wide variety of complex physics, from intense laser plasma interactions to the properties of high-energy density plasmas and the transport of relativistic electron beams (REB), here we simplify the physics by breaking down the efficiency into three measurable parameters: (i) energy conversion ratio from laser to REB, (ii) probability of collision between the REB and the fusion fuel core, and (iii) fraction of energy deposited in the fuel core from the REB. These three parameters were measured with the newly developed experimental platform designed for mimicking the plasma conditions of a realistic integrated fast-ignition experiment. The experimental results indicate that the high-energy tail of REB must be suppressed to heat the fuel core efficiently.
Quantitative K alpha line spectroscopy for energytransport in fast ignition plasma driven with LFEX PW laser 査読

Z. Zhang, H. Nishimura, S. Fujioka, Y. Arikawa, T. Ikenouchi, M. Nakai, H. Nagatomo, H. Chen, J. Park, G. J. Williams, T. Ozaki, H. Shiraga, S. Kojima, H. Hosoda, N. Miyanaga, J. Kawanaka, Y. Nakata, T. Jitsuno, H. Azechi

HIGH ENERGY DENSITY PHYSICS 15 78 - 81 2015年6月

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Quantitative high-energy X-ray spectroscopy is applied for the laser plasma interaction in the fast ignition scheme. A double tracer layer target is designed for the absolute measurement of hot electron temperature and laser energy transfer efficiency. The hot electron temperature is determined from the ratio of the number of K alpha photons from the first and second tracers. Consequently, the energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer mechanism, is derived. In a cone-guide geometry, we simultaneously measured the hot electron temperature and the energy transfer efficiency from the incident LFEX, a kJ-class PW laser, which were measured to be 5.3 MeV and 37%, respectively. (C) 2015 Elsevier B.V. All rights reserved.
Response measurement of single-crystal chemical vapor deposition diamond radiation detector for intense X-rays aiming at neutron bang-time and neutron burn-history measurement on an inertial confinement fusion with fast ignition 査読

T. Shimaoka, J. H. Kaneko, Y. Arikawa, M. Isobe, Y. Sato, M. Tsubota, T. Nagai, S. Kojima, Y. Abe, S. Sakata, S. Fujioka, M. Nakai, H. Shiraga, H. Azechi, A. Chayahara, H. Umezawa, S. Shikata

REVIEW OF SCIENTIFIC INSTRUMENTS 86 ( 5 ) 2015年5月

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A neutron bang time and burn history monitor in inertial confinement fusion with fast ignition are necessary for plasma diagnostics. In the FIREX project, however, no detector attained those capabilities because high-intensity X-rays accompanied fast electrons used for plasma heating. To solve this problem, single-crystal CVD diamond was grown and fabricated into a radiation detector. The detector, which had excellent charge transportation property, was tested to obtain a response function for intense X-rays. The applicability for neutron bang time and burn history monitor was verified experimentally. Charge collection efficiency of 99.5% +/- 0.8% and 97.1% +/- 1.4% for holes and electrons were obtained using 5.486 MeV alpha particles. The drift velocity at electric field which saturates charge collection efficiency was 1.1 +/- 0.4 x 10(7) cm/s and 1.0 +/- 0.3 x 10(7) cm/s for holes and electrons. Fast response of several ns pulse width for intense X-ray was obtained at the GEKKO XII experiment, which is sufficiently fast for ToF measurements to obtain a neutron signal separately from X-rays. Based on these results, we confirmed that the single-crystal CVD diamond detector obtained neutron signal with good S/N under ion temperature 0.5-1 keV and neutron yield of more than 109 neutrons/shot. (C) 2015 AIP Publishing LLC.
18pCP-10 物質の圧縮率がレーザーインプリントに与える効果

加藤弘樹, 重森啓介, 中井光男, 境家達弘, 細木亮太, 寺崎英紀, 長友英夫, 弘中陽一郎, 疇地宏

日本物理学会講演概要集 70 679 - 679 2015年
24pBH-6 プラズマミラーを用いた高速点火核融合高速電子発生

有川安信, 小島完興, 藤岡慎介, Morace Alessio, 側貴行, 坂田匠平, 余語覚文, Zhe Zhang, 時田茂樹, 池之内孝仁, 長井隆浩, 安部勇輝, 宇津木卓, 李昇浩, 井上裕晶, 田口雄基, 松尾一輝, 戸崎翔太, 畑昌育, 長友英夫, 砂原淳, 城崎知至, 尾崎哲, 坂上仁志, 井上峻介, 寺本研介, 中島裕人, 橋田昌樹, 阪部周二, 匂坂明人, 小倉浩一, Pirozhkov Alexander, 錦野将元, 近藤公伯, 西村博明, 白神宏之, 中井光男, FIREX group, LFEX group, 疇地宏

日本物理学会講演概要集 70 953 - 953 2015年
24aCM-8 レーザー生成相対論的電子ビームの強磁場下での伝搬特性

坂田匠平, 藤岡慎介, 松尾一輝, 小島完興, Zhe Zhang, 近藤康太郎, 城崎知至, 田口俊弘, 三間圀興, 有川安信, Morace Alessio, 長井隆浩, 安部勇輝, 池之内孝仁, 尾崎哲, 西村博明, 中井光男, 白神宏之, 長友英夫, 疇地宏

日本物理学会講演概要集 70 940 - 940 2015年
24aBH-4 高強度レーザーのCD-shell内面照射によるホットスパーク生成実験と高速点火核融合への応用

安部勇輝, 砂原淳, 長井隆浩, 李昇浩, Zhe Zhang, 池之内孝仁, 小島完興, 坂田匠平, 有川安信, 藤岡慎介, 中井光男, 白神宏之, 乗松孝好, 疇地宏

日本物理学会講演概要集 70 926 - 926 2015年
24aBH-3 燃料球内面照射型高速点火核融合の理論と点火デザイン

砂原淳, 城崎知至, 柳川琢省, 坂上仁志, 安部勇輝, 長井隆浩, 李昇浩, Zhe Zhang, 池之内孝仁, 小島完興, 坂田匠平, 有川安信, 藤岡慎介, 中井光男, 白神宏之, 乗松孝好, 疇地宏, FIREXプロジェクトチーム

日本物理学会講演概要集 70 925 - 925 2015年
22aCM-6 Study of Proton Stopping Power in Dense Plasmas

Morace A., Feugeas J-L., Nicolai P., Fujioka S., Arikawa Y., Norimatsu T., Hosokawa H., Honrubia J., Batani D., Jakubowska K., Yogo A., Nakai M., Kojima S., Zhang Z., Abe Y., Mima K., Shiraga H., Nishimura H., Azechi H.

日本物理学会講演概要集 70 861 - 861 2015年
19aCP-5 爆縮プラズマが高速電子発生に与える影響査読

有川安信, 側貴行, 山本拓未, 松尾一輝, 戸崎翔太, Law King Fai, 川島丈嗣, 植田泰智, 弘中陽一郎, 重森啓介, 余語覚文, 小島完興, 宮永憲明, 實野孝久, 河仲準二, 中田芳樹, 時田茂樹, 長友英夫, 西村博明, 白神宏之, 中井光男, 砂原淳, 藤岡慎介, 城崎知至, 尾崎哲, 坂上仁志, Zhe Zhang, 疇地宏, FIREX group, LFEX group, Alessio Morace, 畑昌育, 坂田匠平, 安部勇輝, 李昇浩, 加藤弘樹

日本物理学会講演概要集 70 ( 0 ) 698 - 698 2015年
19aCP-2 ミラー型磁場を用いたレーザー生成相対論電子ビームの集束実験査読

坂田匠平, 有川安信, M. Bailly-Grandvaux, C. Bellei, 尾崎哲, 畑昌育, 城崎知至, 砂原淳, 余語覚文, 中井光男, 西村博明, 近藤康太郎, 白神宏之, 長友英夫, J. J. Santos, 藤岡慎介, 疇地宏, 弘中陽一郎, 小島完興, 松尾一輝, K. F. Law, S. H. Lee, A. Morace, X. Vaisseau

日本物理学会講演概要集 70 ( 0 ) 695 - 695 2015年
High-intensity neutron generation via laser-driven photonuclear reaction 招待

Yasunobu Arikawa, Masaru Utsugi, Morace Alessio, Takahiro Nagai, Yuki Abe, Sadaoki Kojima, Shohei Sakata, Hiroaki Inoue, Shinsuke Fujioka, Zhe Zhang, Hui Chen, Jaebum Park, Jackson Williams, Taichi Morita, Yoichi Sakawa, Yoshiki Nakata, Junji Kawanaka, Takahisa Jitsuno, Nobuhiko Sarukura, Noriaki Miyanaga, Mitsuo Nakai, Hiroyuki Shiraga, Hiroaki Nishimura, Hiroshi Azechi

Plasma and Fusion Research 10 ( SpecialIssue.1 ) 2015 2015年

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© 2015 The Japan Society of Plasma Science and Nuclear Fusion Research. The generation of high-peak-intensity neutrons through a photonuclear reaction was demonstrated using the Laser for Fast Ignition Experiments (LFEX) at Osaka University. Up to 109 neutrons/shot were generated from a 1mm sized gold target. Using Monte Carlo simulations, the neutron spectrum from keV to MeV was found to be independent of the γ-ray spectrum. The typical peak neutron intensity of 1021 neutrons /cm2/s at the target surface was estimated, and it should be a useful tool for nuclear synthesis experiments.
Laser erosion diagnostics of plasma facing materials with displacement sensors and their application to safeguard monitors to protect nuclear fusion chambers 査読

Koichi Kasuya, Shinji Motokoshi, Seiji Taniguchi, Mitsuo Nakai, Kazutoshi Tokunaga, Waldemar Mroz, Bogus Law Budner, Barbara Korczyc

XX INTERNATIONAL SYMPOSIUM ON HIGH-POWER LASER SYSTEMS AND APPLICATIONS 2014 9255 2015年

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Tungsten and SiC are candidates for the structural materials of the nuclear fusion reactor walls, while CVD poly-crystal diamond is candidate for the window material under the hazardous fusion stresses. We measured the surface endurance strength of such materials with commercial displacement sensors and our recent evaluation method. The pulsed high thermal input was put into the material surfaces by UV lasers, and the surface erosions were diagnosed. With the increase of the total number of the laser shots per position, the crater depth increased gradually. The 3D and 2D pictures of the craters were gathered and compared under various experimental conditions. For example, the maximum crater depths were plotted as a function of shot accumulated numbers, from which we evaluated the threshold thermal input for the surface erosions to be induced. The simple comparison-result showed that tungsten was stronger roughly two times than SiC. Then we proposed how to monitor the surface conditions of combined samples with such diamonds coated with thin tungsten layers, when we use such samples as parts of divertor inner walls, fusion chamber first walls, and various diagnostic windows. We investigated how we might be able to measure the inner surface erosions with the same kinds of displacement sensors. We found out the measurable maximum thickness of such diamond which is useful to monitor the erosion. Additionally we showed a new scheme of fusion reactor systems with injectors for anisotropic pellets and heating lasers under the probable use of W and/or SiC.
Characterizing a fast-response, low-afterglow liquid scintillator for neutron time-of-flight diagnostics in fast ignition experiments 査読

Y. Abe, H. Hosoda, Y. Arikawa, T. Nagai, S. Kojima, S. Sakata, H. Inoue, Y. Iwasa, K. Iwano, K. Yamanoi, S. Fujioka, M. Nakai, N. Sarukura, H. Shiraga, T. Norimatsu, H. Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 85 ( 11 ) 1.10E+127 2014年11月

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The characteristics of oxygen-enriched liquid scintillators with very low afterglow are investigated and optimized for application to a single-hit neutron spectrometer for fast ignition experiments. It is found that 1,2,4-trimethylbenzene has better characteristics as a liquid scintillator solvent than the conventional solvent, p-xylene. In addition, a benzophenon-doped BBQ liquid scintillator is shown to demonstrate very rapid time response, and therefore has potential for further use in neutron diagnostics with fast time resolution. (C) 2014 AIP Publishing LLC.
Development of multichannel low-energy neutron spectrometer 査読

Y. Arikawa, T. Nagai, Y. Abe, S. Kojima, S. Sakata, H. Inoue, M. Utsugi, Y. Iwasa, T. Murata, N. Sarukura, M. Nakai, H. Shiraga, S. Fujioka, H. Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 85 ( 11 ) 2014年11月

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A multichannel low-energy neutron spectrometer for down-scattered neutron (DSN) measurements in inertial confinement fusion (ICF) experiments has been developed. Our compact-size 256-channel lithium-glass-scintillator-based spectrometer has been implemented and tested in ICF experiments with the GEKKO XII laser. We have performed time calibration of the 256-channel analog-to-digital convertor system used for DSN measurements via X-ray pulse signals. We have clearly observed the DD-primary fusion neutron signal and have successfully studied the detector's impulse response. Our detector is soon to be implemented in future ICF experiments. (C) 2014 AIP Publishing LLC.
Accuracy evaluation of a Compton X-ray spectrometer with bremsstrahlung X-rays generated by a 6 MeV electron bunch 査読

Sadaoki Kojima, Yasunobu Arikawa, Yasuhiko Nishimura, Hiromi Togawa, Zhe Zhang, Takahito Ikenouchi, Tetsuo Ozaki, Alessio Morace, Takahiro Nagai, Yuki Abe, Shouhei Sakata, Hiroaki Inoue, Masaru Utsugi, Mitsuo Nakai, Hiroaki Nishimura, Hiroyuki Shiraga, Ryukou Kato, Shinsuke Fujioka, Hiroshi Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 85 ( 11 ) 2014年11月

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A Compton-scattering-based X-ray spectrometer is developed to obtain the energy distribution of fast electrons produced by intense laser and matter interactions. Bremsstrahlung X-rays generated by fast electrons in a material are used to measure fast electrons' energy distribution in matter. In the Compton X-ray spectrometer, X-rays are converted into recoil electrons by Compton scattering in a converter made from fused silica glass, and a magnet-based electron energy analyzer is used to measure the energy distribution of the electrons that recoil in the direction of the incident X-rays. The spectrum of the incident X-rays is reconstructed from the energy distribution of the recoil electrons. The accuracy of this spectrometer is evaluated using a quasi-monoenergetic 6 MeV electron bunch that emanates from a linear accelerator. An electron bunch is injected into a 1.5 mm thick tungsten plate to produce bremsstrahlung X-rays. The spectrum of these bremsstrahlung X-rays is obtained in the range from 1 to 9MeV. The energy of the electrons in the bunch is estimated using a Monte Carlo simulation of particle-matter interactions. The result shows that the spectrometer's energy accuracy is +/- 0.5 MeV for 6.0 MeV electrons. (C) 2014 AIP Publishing LLC.
Photonuclear reaction based high-energy x-ray spectrometer to cover from 2 MeV to 20 MeV 査読

S. Sakata, Y. Arikawa, S. Kojima, T. Ikenouchi, T. Nagai, Y. Abe, H. Inoue, A. Morace, M. Utsugi, R. Kato, H. Nishimura, M. Nakai, H. Shiraga, S. Fujioka, H. Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 85 ( 11 ) 2014年11月

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A photonuclear-reaction-based hard x-ray spectrometer is developed to measure the number and energy spectrum of fast electrons generated by interactions between plasma and intense laser light. In this spectrometer, x-rays are converted to neutrons through photonuclear reactions, and the neutrons are counted with a bubble detector that is insensitive to x-rays. The spectrometer consists of a bundle of hard x-ray detectors that respond to different photon-energy ranges. Proof-of-principle experiment was performed on a linear accelerator facility. A quasi-monoenergetic electron bunch (N-e = 1.0 x 10(-6) C, E-e = 16 +/- 0.32 MeV) was injected into a 5-mm-thick lead plate. Bremsstrahlung x-rays, which emanate from the lead plate, were measured with the spectrometer. The measured spectral shape and intensity agree fairly well with those computed with a Monte Carlo simulation code. The result shows that high-energy x-rays can be measured absolutely with a photon-counting accuracy of 50%-70% in the energy range from 2 MeV to 20 MeV with a spectral resolution (Delta h nu/h nu) of about 15%. Quantum efficiency of this spectrometer was designed to be 10(-7), 10(-4), 10(-5), respectively, for 2-10, 11-15, and 15-25 MeV of photon energy ranges. (C) 2014 AIP Publishing LLC.
Development of x-ray radiography for high energy density physics 査読

A. Morace, L. Fedeli, D. Batani, S. Baton, F. N. Beg, S. Hulin, L. C. Jarrott, A. Margarit, M. Nakai, M. Nakatsutsumi, P. Nicolai, N. Piovella, M. S. Wei, X. Vaisseau, L. Volpe, J. J. Santos

PHYSICS OF PLASMAS 21 ( 10 ) 2014年10月

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We describe an experiment performed at the LULI laser facility using an advanced radiographic technique that allowed obtaining 2D, spatially resolved images of a shocked buried-code-target. The technique is suitable for applications on Fast Ignition as well as Warm Dense Matter research. In our experiment, it allowed to show cone survival up to Mbar pressures and to measure the shock front velocity and the fluid velocity associated to the laser-generated shock. This allowed obtaining one point on the shock polar of porous carbon. (C) 2014 AIP Publishing LLC.
High intensity g-ray and neutron generation by ultra intense laser 査読

Yasunobu Arikawa, Masaru Utsugi, Alessio Morace, Takahiro Nagai, Sadaoki Kojima, Shohei Sakata, Hiroaki Inoue, Shigeki Tokita, Yoshiki Nakata, Junji Kawanaka, Takahisa Jitsuno, Nobuhiko Sarukura, Noriaki Miyanaga, Mitsuo Nakai, Hiroyuki Shiraga, Hiroaki Nishimura, Hiroshi Azechi

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 248 2014年8月
Stabilization of radiation reaction with vacuum polarization 査読

Keita Seto, Sen Zhang, James Koga, Hideo Nagatomo, Mitsuo Nakai, Kunioki Mima

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS ( 4 ) 2014年4月

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From the development of the electron theory by H. A. Lorentz in 1906, many authors have tried to reformulate this model. P. A. M. Dirac derived the relativistic-classical electron model in 1938, which is now called the Lorentz-Abraham-Dirac model. But this model has the big difficulty of the runaway solution. Recently, this equation has become important for ultra-intense laser-electron (plasma) interactions. For simulations in this research field, it is desirable to stabilize this model of the radiation reaction. In this paper, we will discuss this ability for radiation reaction with the inclusion of vacuum polarization.
Development of compton X-ray spectrometer for fast ignition experiment 査読

Sadaoki Kojima, Yasunobu Arikawa, Takahito Ikenouchi, Takahiro Nagai, Yuki Abe, Shouhei Sakata, Hiroaki Inoue, Takuya Namimoto, Shinsuke Fujioka, Mitsuo Nakai, Hiroyuki Shiraga, Tetsuo Ozaki, Makoto R. Asakawa, Ryukou Kato, Hiroshi Azechi

Plasma and Fusion Research 9 ( 3 ) 2014年

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In the context of Fast Ignition, the fast electron temperature is a key parameter to determine the laserto- fast electron energy conversion efficiency. Bremsstrahlung X-ray (γ-ray) emission represents an attractive alternative to measure this fundamental parameter. In this study, a single-shot high-energy γ-ray spectrometer with sensitivity ranging from 0.5MeV to 7MeV was developed, allowing to estimate the γ-ray spectrum in the fast ignition. © 2014 The Japan Society of Plasma Science and Nuclear Fusion Research.
Energy transportation by mev hot electrons in fast ignition plasma driven with LFEX PW laser 査読

Zhe Zhang, Hiroaki Nishimura, Shinsuke Fujioka, Yasunobu Arikawa, Mitsuo Nakai, Hideo Nagatomo, Hiroyuki Shiraga, Sadaoki Kojima, Alessio Morace, Noriaki Miyanaga, Junji Kawanaka, Yoshiki Nakata, Takahisa Jitsuno, Hiroshi Azechi, Tetsuo Ozaki, Hui Chen, Jaebum Park, Gerald Jackson Williams, Tomoyuki Johzaki, Atsushi Sunahara

Plasma and Fusion Research 9 2014年

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Implosion and heating experiments with the scheme of fast ignition (FI) have been performed on Gekko-XII and LFEX laser platform at the Institute of Laser Engineering in Osaka University. A cone-guided CD-shell has been used as a base-line target for the fast ignition realization. The information about energy transfer from LFEX petawatt (PW) laser is quantitatively studied with an absolute Kα diagnostics and a fast electron trajectory simulation. The transfer efficiency (ηTE) is estimated for a planar interaction as a reference and for several types of guiding-cone. As a general trend, the guiding-cone enhanced the ηTE by a factor of 3 comparing with the planar case.
The development of the neutron detector for the fast ignition experiment by using LFEX and gekko XII facility 査読

Nagai T, Nakai M, Arikawa Y, Abe Y, Kojima S, Sakata S, Inoue H, Fujioka S, Shiraga H, Sarukura N, Norimatsu T, Azechi H

Plasma and Fusion Research 9 ( SPECIALISSUE.3 ) 2014年
The neutron imaging diagnostics and reconstructing technique for fast ignition 査読

Inoue H, Arikawa Y, Nozaki S, Fujioka S, Nagai T, Kojima S, Abe Y, Sakata S, Kinjo A, Nakai M, Shiraga H, Azechi H

Plasma and Fusion Research 9 ( SPECIALISSUE.3 ) 2014年
Present status of fast ignition realization experiment and inertial fusion energy development 査読

H. Azechi, K. Mima, S. Shiraga, S. Fujioka, H. Nagatomo, T. Johzaki, T. Jitsuno, M. Key, R. Kodama, M. Koga, K. Kondo, J. Kawanaka, N. Miyanaga, M. Murakami, K. Nagai, M. Nakai, H. Nakamura, T. Nakamura, T. Nakazato, Y. Nakao, K. Nishihara, H. Nishimura, T. Norimatsu, P. Norreys, T. Ozaki, J. Pasley, H. Sakagami, Y. Sakawa, N. Sarukura, K. Shigemori, T. Shimizu, A. Sunahara, T. Taguchi, K. Tanaka, K. Tsubakimoto, Y. Fujimoto, H. Homma, A. Iwamoto

NUCLEAR FUSION 53 ( 10 ) 2013年10月

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One of the most advanced fast ignition programmes is the fast ignition realization experiment (FIREX). The goal of its first phase is to demonstrate ignition temperature of 5 keV, followed by the second phase to demonstrate ignition-and-burn. The second series experiment of FIREX-I, from late 2010 to early 2011, has demonstrated a high (>10%) coupling efficiency from laser to thermal energy of the compressed core, suggesting that the ignition temperature can be achieved at laser energy below 10 kJ. Further improvement of the coupling efficiency is expected by introducing laser-driven magnetic fields.
Efficient Generation and Collimation of Relativistic Electron Beams for Fast-Ignition Laser Fusion

S. Fujioka, H. Shiraga, Y. Arikawa, Y. Fujimoto, Y. Hironaka, T. Jitsuno, J. Kawanaka, K. Mima, N. Miyanaga, M. Murakami, H. Nagatomo, M. Nakai, Y. Nakata, K. Nishihara, H. Nishimura, T. Norimatsu, Y. Sakawa, N. Sarukura, K. Shigemori, T. Shimizu, K. Tsubakimoto, Z. Zhang, A. Sunahara, T. Johzaki, T. Taguchi, A. Iwamoto, T. Ozaki, T. Watanabe, H. Sakagami, H. Azechi

2013年9月
Luminescence properties of Nd3+ and Er3+ doped glasses in the VUV region 査読

Kohei Yamanoi, Takahiro Murata, Yasunobu Arikawa, Tomoharu Nakazato, Marilou Cadatal-Raduban, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroaki Nishimura, Hiroshi Azechi, Shigeru Fujino, Hideki Yoshida, Akira Yoshikawa, Nakahiro Satoh, Hirofumi Kan

OPTICAL MATERIALS 35 ( 11 ) 1962 - 1964 2013年9月

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We report the vacuum ultraviolet (VUV) spectroscopy of APLF + Nd and APLF + Er glass, with composition 20Al(PO3)(3)-80LiF + 1NdF(3) and + 1ErF(3) (in mol%). APLF + Nd and APLF + Er have a dominant fluorescence peak at 185 nm and 168 nm with decay times of 4.5 ns and 5.8 ns, respectively. Fluorescence from APLF + Nd is attributed to 4f(2)5d -> 4f(3) transitions in neodymium (Nd) while fluorescence from APLF + Er is due to spin allowed transition in erbium (Er). This is the first report of VUV fluorescence from rare earth ions doped in glass hosts, which could provide the basis for mass production of VUV emitting materials. Our results also suggest the potential of using APLF + Nd and APLF + Er as neutron scintillators during inertial confinement fusion. (C) 2012 Elsevier B.V. All rights reserved.
Quantitative measurement of hard X-ray spectra from laser-driven fast ignition plasma 査読

Z. Zhang, H. Nishimura, T. Namimoto, S. Fujioka, Y. Arikawa, H. Nagatomo, M. Nakai, T. Ozaki, M. Koga, T. Johzaki, A. Sunahara, H. Chen, J. Park, G. J. Williams, H. Shiraga, S. Kojima, M. Nishikino, T. Kawachi, H. Hosoda, Y. Okano, N. Miyanaga, J. Kawanaka, Y. Nakata, T. Jitsuno, H. Azechi

High Energy Density Physics 9 ( 3 ) 435 - 438 2013年9月

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Absolute K. α line spectroscopy is proposed for studying laser-plasma interactions taking place in the Au cone-guided fast ignition targets. X-ray spectra ranging from 20 to 100keV were quantitatively measured with a Laue spectrometer composed of a cylindrically curved crystal and a filter-absorption method for Bremsstrahlung continuum emission. The absolute sensitivities of the Laue spectrometer systems were calibrated using pre-characterized laser-produced X-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an X-ray diffraction code. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer mechanism, is derived from this work. The absolute yield of Au and Ta K. α lines were measured in the fast ignition experimental campaign performed at Institute of Laser Engineering, Osaka University. Applying the hot electron spectrum information from electron spectrometer and scaling laws, the energy transfer efficiency from the incident LFEX, a kJ-class PW laser, to hot electrons was derived for the first time. © 2013 Elsevier B.V.
FIREX foam cryogenic target development: Residual void reduction and estimation with solid hydrogen refractive index measurements 査読

A. Iwamoto, T. Fujimura, M. Nakai, T. Norimatsu, H. Sakagami, H. Shiraga, H. Azechi

Nuclear Fusion 53 ( 8 ) 2013年8月

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Voidless fuel solidification within a foam material is attempted for the development of a Fast Ignition Realization EXperiment (FIREX) target. A typical target consists of a foam shell with a thin solid fuel layer, a gold cone guide and a glass fill tube. The foam layer is formed with aggregations of tiny cells. The porous foam material has the advantage of forming a uniform layer in a liquid state by the effect of capillarity. Random liquid-solid transitions of fuel, however, would cause void spaces in each cell because of their different densities. To form a voidless solid fuel layer in the FIREX target, we propose a layering method, which includes the process of controlled solidification and simultaneous liquid fuel supply to the liquid/solid interface. Normal H 2 is used as a surrogate fuel for our experiments. By applying a resorcinol/formalin aerogel, which has been developed in the Institute of Laser Engineering, Osaka University, instead of a foam material, formation of a solid H2 layer with reduced void spaces is preliminarily demonstrated. Related solid H2 refractive indices are measured to estimate the void fraction. Eventually, its filling factor reaches ∼99%. Furthermore, the application of the proved method is numerically simulated on the FIREX target. The method is confirmed to be applicable in it with a cone guide heating technique. © 2013 IAEA, Vienna.
OPIC Conference on Laser and Accelerator Neutron Sources and Applications '13 (LANSA'13) 開催報告

西村博明, 有川安信, 中井光男

レーザー研究 41 ( 7 ) 540 - 542 2013年7月
Electronic States of Trivalent Praseodymium Ion Doped in 20Al(PO3)(3)-80LiF Glass 査読

Tsuboi Mizuki, Takeda Kohei, Nakazato Tomoharu, Kono Masahiro, Yamanoi Kohei, Cadatal-Raduban Marilou, Sakai Kohei, Nishi Ryosuke, Minami Yuki, Mui Viet Luong, Arikawa Yasunobu, Shimizu Toshihiko, Sarukurua Nobuhiko, Norimatsu Takayoshi, Nakai Mitsuo, Azechi Hiroshi, Murata Takahiro, Fujino Shigeru, Yoshida Hideki, Yoshikawa Akira, Sato Nakahiro, Kan Hirofumi, Kamata Kei

JAPANESE JOURNAL OF APPLIED PHYSICS 52 ( 6 ) 2013年6月
New insights into the laser produced electron-positron pairs 査読

Hui Chen, M. Nakai, Y. Sentoku, Y. Arikawa, H. Azechi, S. Fujioka, C. Keane, S. Kojima, W. Goldstein, B. R. Maddox, N. Miyanaga, T. Morita, T. Nagai, H. Nishimura, T. Ozaki, J. Park, Y. Sakawa, H. Takabe, G. Williams, Z. Zhang

NEW JOURNAL OF PHYSICS 15 2013年6月

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We report new results from the intense laser target interaction experiment that produces relativistic electron-positron pairs. Laser to electron energy transfer, inferred using x-ray and neutron measurements, was found to be consistent with the measured positrons. To increase the number of positrons, one needs to deliver a greater number of relativistic electrons from the laser-plasma interaction to the high Z gold target. A large preplasma was found to have a negative impact for this purpose, while the laser could produce hotter electrons in such preplasma. The peak energy shift in the positron spectrum is confirmed as the post-acceleration in the sheath potential behind the target. The results were supported by a collisional one-dimensional particle-in-cell code. This experiment was performed using the high-power LFEX laser at the Institute of Laser Engineering at Osaka University using a suite of diagnostics measuring electrons, positrons, x-rays and neutrons from the laser-target interaction at the relativistic regime.
Pr or Ce-doped, fast-response and low-afterglow cross-section-enhanced scintillator with Li-6 for down-scattered neutron originated from laser fusion 査読

Kozue Watanabe, Yasunobu Arikawa, Kohei Yamanoi, Marilou Cadatal-Raduban, Takahiro Nagai, Masahiro Kouno, Kohei Sakai, Tomoharu Nazakato, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Akira Yoshikawa, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Nobuhiko Izumi, Nakahiro Satoh, Hirofumi Kan

JOURNAL OF CRYSTAL GROWTH 362 288 - 290 2013年1月

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We explore the potential of Pr- or Ce-doped 20Al(PO3)(3)-80LiF (APLF80+3Pr or +3Ce) scintillator to observe the lower edge of down-scattered neutron and discriminate fusion originated neutron from strong X-ray signals. APLF80+3Pr or +3Ce scintillator exhibits considerably fast decay profiles and negligible slow-decay components. Using these newly developed APLF80+3Pr or +3Ce scintillators, we have successfully observed fusion-originated neutron signal in the midst of strong X-ray-excited fluorescence in an integrated experiment using our 10 kJ class GEKKO XII Nd-glass laser system. A sophisticated neutron detection system using APLF80+3Pr or 3Ce will be used for the first fast ignition experiment. (C) 2011 Elsevier BY. All rights reserved.
Development of time-of-flight neutron detector with fast-decay and low-afterglow scintillator for fast ignition experiment 査読

T. Nagai, Y. Arikawa, H. Hosoda, Y. Ioka, A. Hasegawa, K. Wada, S. Takaoku, M. Takata, K. Noritake, Y. Minami, K. Watanabe, K. Yamanoi, H. Nakamura, T. Watari, M. Cadatal-Raduban, T. Shimizu, N. Sarukura, M. Nakai, T. Norimatsu, H. Azechi

IFSA 2011 - SEVENTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS 59 2013年

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A fast-decay and low-afterglow liquid scintillator was developed for the fast ignition experiment at the Institute of Laser Engineering (ILE). The liquid scintillator was coupled to a gated photomultiplier (PMT), and the gating performance under high-intensity gamma-rays was experimentally checked. In 2010, a detector with a high detection efficiency of 10(-4) was developed and installed in this experiment. The neutron yield in the fast heating experiment was successfully measured using this detector.
Implosion and heating experiments of fast ignition targets by Gekko-XII and LFEX lasers 査読

H. Shiraga, S. Fujioka, M. Nakai, T. Watari, H. Nakamura, Y. Arikawa, H. Hosoda, T. Nagai, M. Koga, H. Kikuchi, Y. Ishii, T. Sogo, K. Shigemori, H. Nishimura, Z. Zhang, M. Tanabe, S. Ohira, Y. Fujii, T. Namimoto, Y. Sakawa, O. Maegawa, T. Ozaki, K. A. Tanaka, H. Habara, T. Iwawaki, K. Shimada, M. Key, P. Norreys, J. Pasley, H. Nagatomo, T. Johzaki, A. Sunahara, M. Murakami, H. Sakagami, T. Taguchi, T. Norimatsu, H. Homma, Y. Fujimoto, A. Iwamoto, N. Miyanaga, J. Kawanaka, T. Kanabe, T. Jitsuno, Y. Nakata, K. Tsubakimoto, K. Sueda, R. Kodama, K. Kondo, N. Morio, S. Matsuo, T. Kawasaki, K. Sawai, K. Tsuji, H. Murakami, N. Sarukura, T. Shimizu, K. Mima, H. Azechi

IFSA 2011 - SEVENTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS 59 2013年

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The FIREX-1 project, the goal of which is to demonstrate fuel heating up to 5 keV by fast ignition scheme, has been carried out since 2003 including construction and tuning of LFEX laser and integrated experiments. Implosion and heating experiment of Fast Ignition targets have been performed since 2009 with Gekko-XII and LFEX lasers. A deuterated polystyrene shell target was imploded with the 0.53-mu m Gekko-XII, and the 1.053-mu m beam of the LFEX laser was injected through a gold cone attached to the shell to generate hot electrons to heat the imploded fuel plasma. Pulse contrast ratio of the LFEX beam was significantly improved. Also a variety of plasma diagnostic instruments were developed to be compatible with harsh environment of intense hard x-rays (gamma rays) and electromagnetic pulses due to the intense LFEX beam on the target. Large background signals around the DD neutron signal in time-of-flight record of neutron detector were found to consist of neutrons via (gamma, n) reactions and scattered gamma rays. Enhanced neutron yield was confirmed by carefully eliminating such backgrounds. Neutron enhancement up to 3.5 x 10(7) was observed. Heating efficiency was estimated to be 10-20% assuming a uniform temperature rise model.
Multichannel down-scattered neutron detector for areal density measurement

Y. Arikawa, H. Hosoda, T. Nagai, K. Watanabe, K. Yamanoi, M. Cadatal-Raduban, T. Shimizu, N. Sarukura, M. Nakai, T. Norimatsu, H. Azechi, N. Izumi, T. Murata, T. Suyama, A. Yoshikawa, K. Kamada, Y. Usuki, N. Satoh, H. Kan

EPJ Web of Conferences 59 UNSP 13011 2013年

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A down-scattered neutron detector operating in the multichannel counting mode was developed for areal density (ρR) measurement. Equipped with a newly developed 6Li glass scintillator (APLF80), the detector was tested in a fusion experiment at the GEKKO XII facility, Osaka University, Osaka, Japan. For a low-ρR fusion shot, the detector clearly discriminated the γ-rays, primary neutrons, γ-rays produced via (n, γ) reactions from the target chamber, and neutrons scattered by the target chamber. Furthermore, the observed signal was in good agreement with predictions made by Monte Carlo simulation. © Owned by the authors, published by EDP Sciences, 2013.
Implosion and heating experiments of fast ignition targets by Gekko-XII and LFEX lasers 査読

H. Shiraga, S. Fujioka, M. Nakai, T. Watari, H. Nakamura, Y. Arikawa, H. Hosoda, T. Nagai, M. Koga, H. Kikuchi, Y. Ishii, T. Sogo, K. Shigemori, H. Nishimura, Z. Zhang, M. Tanabe, S. Ohira, Y. Fujii, T. Namimoto, Y. Sakawa, O. Maegawa, T. Ozaki, K. A. Tanaka, H. Habara, T. Iwawaki, K. Shimada, M. Key, P. Norreys, J. Pasley, H. Nagatomo, T. Johzaki, A. Sunahara, M. Murakami, H. Sakagami, T. Taguchi, T. Norimatsu, H. Homma, Y. Fujimoto, A. Iwamoto, N. Miyanaga, J. Kawanaka, T. Kanabe, T. Jitsuno, Y. Nakata, K. Tsubakimoto, K. Sueda, R. Kodama, K. Kondo, N. Morio, S. Matsuo, T. Kawasaki, K. Sawai, K. Tsuji, H. Murakami, N. Sarukura, T. Shimizu, K. Mima, H. Azechi

EPJ Web of Conferences 59 2013年

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The FIREX-1 project, the goal of which is to demonstrate fuel heating up to 5 keV by fast ignition scheme, has been carried out since 2003 including construction and tuning of LFEX laser and integrated experiments. Implosion and heating experiment of Fast Ignition targets have been performed since 2009 with Gekko-XII and LFEX lasers. A deuterated polystyrene shell target was imploded with the 0.53- μm Gekko-XII, and the 1.053- μm beam of the LFEX laser was injected through a gold cone attached to the shell to generate hot electrons to heat the imploded fuel plasma. Pulse contrast ratio of the LFEX beam was significantly improved. Also a variety of plasma diagnostic instruments were developed to be compatible with harsh environment of intense hard x-rays (γ rays) and electromagnetic pulses due to the intense LFEX beam on the target. Large background signals around the DD neutron signal in time-of-flight record of neutron detector were found to consist of neutrons via (γ,n) reactions and scattered gamma rays. Enhanced neutron yield was confirmed by carefully eliminating such backgrounds. Neutron enhancement up to 3.5 × 107 was observed. Heating efficiency was estimated to be 10-20% assuming a uniform temperature rise model. © Owned by the authors, published by EDP Sciences, 2013.
Recent progress of fuel layering study for FIREX cryogenic target 査読

A. Iwamoto, T. Fujimura, M. Nakai, T. Norimatsu, H. Shiraga, H. Azechi, Y. Fujimoto, S. Machi, H. Sakagami

IFSA 2011 - SEVENTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS 59 2013年

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The collaboration research of ILE and NIFS has made progress on the FIREX target developments. We have two fuel layering strategies: a foam shell method and a conical laser guide heating technique. To date, preliminary and principle demonstration stages on both fuel layering methods have been reached. This paper describes the present status of the target developments.
Fast-Response and Low-Afterglow Cerium-Doped Lithium 6 Fluoro-Oxide Glass Scintillator for Laser Fusion-Originated Down-Scattered Neutron Detection 査読

Takahiro Murata, Yasunobu Arikawa, Kozue Watanabe, Kohei Yamanoi, Marilou Cadatal-Raduban, Takahiro Nagai, Masahiro Kouno, Kohei Sakai, Tomoharu Nakazato, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroaki Nishimura, Hiroshi Azechi, Akira Yoshikawa, Shigeru Fujino, Hideki Yoshida, Nobuhiko Izumi, Nakahiro Sato, Hirofumi Kan

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 59 ( 5 ) 2256 - 2259 2012年10月

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Scintillation properties of Ce3+-doped 20Al(PO3)(3)-80LiF glasses were investigated in order to seek a candidate for down-scattered neutron scintillator in nuclear fusion diagnostics. The decay constant of APLF80+3Ce with 5.5 MeV alpha particles from Am-241 radioisotope excitation was measured to be 32.1 ns. Moreover, sufficiently low afterglow decay profile and improved light output of APLF80+3Ce were experimentally demonstrated.
The photonuclear neutron and gamma-ray backgrounds in the fast ignition experiment 査読

Y. Arikawa, T. Nagai, H. Hosoda, Y. Abe, S. Kojima, S. Fujioka, N. Sarukura, M. Nakai, H. Shiraga, T. Ozaki, H. Azechi

Review of Scientific Instruments 83 ( 10 ) 10D909 2012年10月

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In the fast-ignition scheme, very hard x-rays (hereinafter referred to as γ-rays) are generated by Bremsstrahlung radiation from fast electrons. Significant backgrounds were observed around the deuterium-deuterium fusion neutron signals in the experiment in 2010. In this paper the backgrounds were studied in detail, based on Monte Carlo simulations, and they were confirmed to be γ-rays from the target, scattered γ-rays from the experimental bay walls γ'-rays), and neutrons generated by (γ, n) reactions in either the target vacuum chamber or the diagnostic instruments (γ-n neutrons). © 2012 American Institute of Physics.
Integrated experiments of fast ignition targets by Gekko-XII and LFEX lasers 査読

H. Shiraga, S. Fujioka, M. Nakai, T. Watari, H. Nakamura, Y. Arikawa, H. Hosoda, T. Nagai, M. Koga, H. Kikuchi, Y. Ishii, T. Sogo, K. Shigemori, H. Nishimura, Z. Zhang, M. Tanabe, S. Ohira, Y. Fuji, T. Namimoto, Y. Sakawa, O. Maegawa, T. Ozaki, K. A. Tanaka, H. Habara, T. Iwawaki, K. Shimada, H. Nagatomo, T. Johzaki, A. Sunahara, M. Murakami, H. Sakagami, T. Taguchi, T. Norimatsu, H. Homma, Y. Fujimoto, A. Iwamoto, N. Miyanaga, J. Kawanaka, T. Jitsuno, Y. Nakata, K. Tsubakimoto, K. Sueda, N. Morio, S. Matsuo, T. Kawasaki, K. Sawai, K. Tsuji, H. Murakami, T. Kanabe, K. Kondo, R. Kodama, N. Sarukura, T. Shimizu, K. Mima, H. Azechi

HIGH ENERGY DENSITY PHYSICS 8 ( 3 ) 227 - 230 2012年9月

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Implosion and heating experiments at the Institute of Laser Engineering, Osaka University on Fast Ignition (FI) targets for the FIREX-1 project have been performed with Gekko-XII laser for implosions and LFEX laser for heating. We tried to reduce the prepulse level in the LFEX laser system and have improved the plasma diagnostics to observe the plasma in the harsh hard X-ray envilonment. A plastic (CD) shell target, 7-mu m thick and 500 mu m in diameter with a hollow gold cone was used in this experiment to guide the short-pulse laser at the time of the maximum compression. The shell target was imploded with 9 or 12 beams of Gekko-XII laser (527 nm) with energy of 300 J/beam in a 1.5 ns pulse. Two of the four LFEX laser (1053 nm) beams were injected into the inside bottom of the cone with an energy up to 0.7 kJ/beam in a 1.5 Ps pulse at the time around the maximum implosion. We have observed neutron enhancement up to 3.5 x 10(7) with total heating energy of 300 J, which is higher than the yield obtained in the previous experiment in 2002 [R. Kodama et al. Nature 418,933 (2002)]. We found the estimated heating efficiency is at a level of 10-20%. Fuel heating to 5 keV is expected when the full output of LFEX is used. (c) 2012 Elsevier B.V. All rights reserved.
Fast ignition integrated experiments with Gekko and LFEX lasers 査読

H. Shiraga, S. Fujioka, M. Nakai, T. Watari, H. Nakamura, Y. Arikawa, H. Hosoda, T. Nagai, M. Koga, H. Kikuchi, Y. Ishii, T. Sogo, K. Shigemori, H. Nishimura, Z. Zhang, M. Tanabe, S. Ohira, Y. Fujii, T. Namimoto, Y. Sakawa, O. Maegawa, T. Ozaki, K. Tanaka, H. Habara, T. Iwawaki, K. Shimada, H. Nagatomo, T. Johzaki, A. Sunahara, M. Murakami, H. Sakagami, T. Taguchi, T. Norimatsu, H. Homma, Y. Fujimoto, A. Iwamoto, N. Miyanaga, J. Kawanaka, T. Jitsuno, Y. Nakata, K. Tsubakimoto, N. Morio, T. Kawasaki, K. Sawai, K. Tsuji, H. Murakami, T. Kanabe, K. Kondo, N. Sarukura, T. Shimizu, K. Mima, H. Azechi

PLASMA PHYSICS AND CONTROLLED FUSION 53 ( 12 ) 2011年12月

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Based on the successful result of fast heating of a shell target with a cone for heating beam injection at Osaka University in 2002 using the PW laser (Kodama et al 2002 Nature 418 933), the FIREX-1 project was started in 2004. Its goal is to demonstrate fuel heating up to 5 keV using an upgraded heating laser beam. For this purpose, the LFEX laser, which can deliver an energy up to 10 kJ in a 0.5-20 ps pulse at its full spec, has been constructed in addition to the Gekko-XII laser system at the Institute of Laser Engineering, Osaka University. It has been activated and became operational since 2009. Following the previous experiment with the PW laser, upgraded integrated experiments of fast ignition have been started using the LFEX laser with an energy up to 1 kJ in 2009 and 2 kJ in 2010 in a 1-5 ps 1.053 mu m pulse. Experimental results including implosion of the shell target by Gekko-XII, heating of the imploded fuel core by LFEX laser injection, and increase of the neutron yield due to fast heating compared with no heating have been achieved. Results in the 2009 experiment indicated that the heating efficiency was 3-5%, much lower than the 20-30% expected from the previous 2002 data. It was attributed to the very hot electrons generated in a long scale length plasma in the cone preformed with a prepulse in the LFEX beam. The prepulse level was significantly reduced in the 2010 experiment to improve the heating efficiency. Also we have improved the plasma diagnostics significantly which enabled us to observe the plasma even in the hard x-ray harsh environment. In the 2010 experiment, we have observed neutron enhancement up to 3.5 x 10(7) with total heating energy of 300 J on the target, which is higher than the yield obtained in the 2009 experiment and the previous data in 2002. We found the estimated heating efficiency to be at a level of 10-20%. 5 keV heating is expected at the full output of the LFEX laser by controlling the heating efficiency.
LEAKAGE CONTROL OF TRITIUM THROUGH HEAT CYCLES OF CONCEPTUAL-DESIGN, LASER-FUSION REACTOR KOYO-F 査読

T. Norimatsu, H. Saika, H. Homma, M. Nakai, S. Fukada, A. Sagara, H. Azechi

FUSION SCIENCE AND TECHNOLOGY 60 ( 3 ) 893 - 896 2011年10月

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To reduce the tritium permeation from the primary liquid metal loop to the secondary water loop, a heat exchanger concept that incorporates small diameter tubes containing an oxidizer was proposed. An inert gas containing a small amount of oxidizer flows in the small tubes oxiding tritium that comes from the primary liquid metal coolant. The tritiated water is sent to a tritium recovery system minimizing leakage to the secondary water loop. Our evaluation results indicated that the tritium leakage through the heat exchanger was reduced to 1/10(5) with an acceptable increase in the size of the heat exchanger.
Present states and future prospect of fast ignition realization experiment (FIREX) with Gekko and LFEX Lasers at ILE 査読

Mayuko Koga, Y. Arikawa, H. Azechi, Y. Fujimoto, S. Fujioka, H. Habara, Y. Hironaka, H. Homma, H. Hosoda, T. Jitsuno, T. Johzaki, J. Kawanaka, R. Kodama, K. Mima, N. Miyanaga, M. Murakami, H. Nagatomo, M. Nakai, Y. Nakata, H. Nakamura, H. Nishimura, T. Norimatsu, Y. Sakawa, N. Sarukura, K. Shigemori, H. Shiraga, T. Shimizu, H. Takabe, M. Tanabe, K. A. Tanaka, T. Tanimoto, T. Tsubakimoto, T. Watari, A. Sunahara, M. Isobe, A. Iwamoto, T. Mito, O. Motojima, T. Ozaki, H. Sakagami, T. Taguchi, Y. Nakao, H. Cai, M. Key, P. Norreys, J. Pasley

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 653 ( 1 ) 84 - 88 2011年10月

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The fast ignition realization experiment (FIREX) project is progressing. The new short pulse laser system, LFEX laser, has been completely assembled and one of the four beamlets is now in operation. A fast-ignition experiment was performed using this single short pulse combined with the Gekko XII implosion laser. The energy of the GXII implosion laser was about 2 kJ and the pulse width was 1.5 ns. The energy of the LFEX laser was increased upto 800 J and two pulse durations 5 and 1.6 ps were compared. Targets were deuterated plastic shells with gold cones. It was found that the neutron yield was increased by a factor of 30 as a result of the fast electron-induced heating in LFEX 1.6 ps shot. The estimated coupling efficiency between the LFEX laser pulse and the compressed fuel was low (less than 5%). This may be due to pre-plasma formed by light arriving at the target before the main laser pulse. Further investigations and attempts to overcome these problems are now in progress. (C) 2011 Elsevier B.V. All rights reserved.
Fast-response, Low-Afterglow 4,4 '''-Bis[(2-butyloctyl)oxy]-1,1 ':4 ',1 '':4 '',1 '''-quarterphenyl Dye-Based Liquid Scintillator for High-Contrast Detection of Laser Fusion-Generated Neutrons 査読

Takahiro Nagai, Yusuke Ioka, Ai Hasegawa, Kazuhiro Wada, Shingo Takaoku, Masatoshi Takata, Katsuya Noritake, Yuki Minami, Kozue Watanabe, Kohei Yamanoi, Yasunobu Arikawa, Hirokazu Hosoda, Hirotaka Nakamura, Takeshi Watari, Marilou Cadatal-Raduban, Mayuko Koga, Toshihiko Shimizu, Nobuhiko Sarukura, Hiroyuki Shiraga, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi

JAPANESE JOURNAL OF APPLIED PHYSICS 50 ( 8 ) 2011年8月

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4,4'''-Bis[(2-butyloctyl)oxy]-1,1':4',1 '':4 '',1'''-quaterphenyl (BBQ) dye dissolved in xylene and enriched with oxygen is shown to exhibit the characteristics of an ideal neutron scintillator for time-of-flight (TOF) measurement in a laser fusion experiment. Initial results from excitation with 290-nm pulses show that it has a 0.76-ns fast decay component and a negligible slow decay component or afterglow. By using this scintillator for TOF measurement, we have successfully discriminated between nuclear fusion-generated neutrons and X-rays. This would dramatically improve neutron diagnostics in fast ignition experiments where neutrons have to be detected in the presence of an intense X-ray burst. (C) 2011 The Japan Society of Applied Physics
Laser-shock compression and Hugoniot measurements of liquid hydrogen to 55 GPa 査読

T. Sano, N. Ozaki, T. Sakaiya, K. Shigemori, M. Ikoma, T. Kimura, K. Miyanishi, T. Endo, A. Shiroshita, H. Takahashi, T. Jitsui, Y. Hori, Y. Hironaka, A. Iwamoto, T. Kadono, M. Nakai, T. Okuchi, K. Otani, K. Shimizu, T. Kondo, R. Kodama, K. Mima

PHYSICAL REVIEW B 83 ( 5 ) 2011年2月

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The principal Hugoniot for liquid hydrogen was obtained up to 55 GPa under laser-driven shock loading. The pressure and density of compressed hydrogen were determined by impedance matching to a quartz standard. The shock temperature was independently measured from the brightness of the shock front. Hugoniot data of hydrogen provide a good benchmark to modern theories of condensed matter. The initial number density of liquid hydrogen is lower than that for liquid deuterium, and this results in shock-compressed hydrogen having a higher compression and higher temperature than deuterium at the same shock pressure.
Optical and scintillation properties of Pr-doped Li-glass for neutron detection in inertial confinement fusion process 査読

Akihiro Fukabori, Takayuki Yanagida, Valery Chani, Federico Moretti, Jan Pejchal, Yuui Yokota, Noriaki Kawaguchi, Kei Kamada, Ken-ichi Watanabe, Takahiro Murata, Yasunobu Arikawa, Kohei Yamanoi, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Shigeru Fujino, Hideki Yoshida, Akira Yoshikawa

JOURNAL OF NON-CRYSTALLINE SOLIDS 357 ( 3 ) 910 - 914 2011年2月

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Optical and scintillation properties of Pr-doped Li-glass, 20Al(PO3)(3)-80LiF:Pr 3%, have been studied for applications in neutron detection systems. Based on optical transmission and reflectivity, the absorption coefficient and refractive index were calculated from the Beer Lambert law. The absorption edge was apparently shifted to the longer wavelength from 160 nm to 240 nm due to 4f -> 5d transitions of Pr ions. The strong absorption peaks of praseodymium 4f -> 4f transitions were observed from 420 nm to 500 nm and around 590 nm. The radio-luminescence spectrum excited by Am-241 5.5 MeV a source was measured. Strong emission peaks were observed around 250 nm. The alpha-ray excited pulse height spectrum and decay kinetics were also examined. Light yield was estimated to be 400 +/- 40 photons/5.5 MeV a and the main component of the decay time was evaluated to be about 12 ns. Furthermore, the pulse height spectrum of the glass excited by 252Cf neutrons was also measured, and the light yield was estimated to be 140 +/- 10 photons/neutron. (C) 2010 Elsevier B.V. All rights reserved.
RECENT DEVELOPMENTS IN FABRICATION OF NEW CONCEPTUAL GOLD CONE AND MACHINING OF POLYSTYRENE SHELL FOR FAST IGNITION TARGET 査読

H. Homma, H. Kadota, H. Hosokawa, M. Nagata, T. Fujimura, K. Nagai, M. Nakai, T. Norimatsu, H. Azechi

FUSION SCIENCE AND TECHNOLOGY 59 ( 1 ) 276 - 278 2011年1月

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Recent developments of several key issues for fabrication techniques of cone and shell target for the first phase of the Fast Ignition Realization Experiment (FIREX-I) project at the Institute of Laser Engineering, Osaka University, are described in this paper. The most important modification of the target design is a double cone, and a new fabrication technique has been developed. Although the error of assembling the cones is still several microns, the first prototype of a double-cone target with a vacuum gap of 20 mu m was successfully provided for the preliminary experiment. Additionally, Ti:sapphire laser machining was used to bore a hole in the polystyrene shell.
Optical properties and structure of Pr3+-doped Al(PO3)3–LiF glasses as scattered neutron scintillator for nuclear fusion diagnostics 査読

T Murata, S Fujino, H Yoshida, Y Arikawa, T Nakazato, T Shimizu, N Sarukura, M Nakai, T Norimatsu, H Azechi, K Kamada, Y Usuki, T Suyama, A Yoshikawa, N Sato, H, Ka

IOP Conf. Series: Materials Science and Engineering 18 ( 8 ) 112006 2011年
Down-scattered neutron imaging detector for areal density measurement of inertial confinement fusion 査読

Y. Arikawa, K. Yamanoi, T. Nakazato, E. S. Estacio, T. Shimizu, N. Sarukura, M. Nakai, H. Hosoda, T. Norimatsu, Y. Hironaka, H. Azechi, N. Izumi, T. Murata, S. Fujino, H. Yoshida, K. Kamada, Y. Usuki, T. Suyama, A. Yoshikawa, N. Satoh, H. Kan

Review of Scientific Instruments 81 ( 10 ) 10D303 2010年10月

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A custom developed 6Li glass scintillator (APLF80+3Pr) for down-scattered neutron diagnostics in inertial confinement fusion experiments is presented. 6Li provides an enhanced sensitivity for down-scattered neutrons in DD fusion and its experimentally observed 5-6 ns response time fulfills the requirement for down-scattered neutron detectors. A time-of-flight detector operating in the current mode using the APLF80+3Pr was designed and its feasibility observing down-scattered neutrons was demonstrated. Furthermore, a prototype design for a down-scattered neutron imaging detector was also demonstrated. This material promises viability as a future down-scattered neutron detector for the National Ignition Facility. © 2010 American Institute of Physics.
Note: Light output enhanced fast response and low afterglow Li-6 glass scintillator as potential down-scattered neutron diagnostics for inertial confinement fusion 査読

Yasunobu Arikawa, Kohei Yamanoi, Takahiro Nagai, Kozue Watanabe, Masahiro Kouno, Kohei Sakai, Tomoharu Nakazato, Toshihiko Shimizu, Marilou Raduban Cadatal, Elmer Surat Estacio, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Nobuhiko Izumi, Nakahiro Satoh, Hirofumi Kan

REVIEW OF SCIENTIFIC INSTRUMENTS 81 ( 10 ) 2010年10月

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The characteristics of an APLF80+3Ce scintillator are presented. Its sufficiently fast decay profile, low afterglow, and an improved light output compared to the recently developed APLF80+3Pr, were experimentally demonstrated. This scintillator material holds promise for applications in neutron imaging diagnostics at the energy regions of 0.27 MeV of DD fusion down-scattered neutron peak at the world's largest inertial confinement fusion facilities such as the National Ignition Facility and the Laser Megajoule. (C) 2010 American Institute of Physics. [doi:10.1063/1.3488460]
Custom-designed scintillator for laser fusion diagnostics - Pr3+-doped fluoro-phosphate lithium glass scintillator 査読

Yasunobu Arikawa, Kohei Yamanoi, Tomoharu Nakazato, Elmer Surat Estacio, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Youichirou Hironaka, Hiroshi Azechi, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Kei Kamada, Yoshiyuki Usuki, Toshihisa Suyama, Akira Yoshikawa, Nakahiro Satoh, Hirohumi Kan

OPTICAL MATERIALS 32 ( 10 ) 1393 - 1396 2010年8月

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A novel custom-developed scintillator for laser fusion diagnostics is reported. With the aim of diagnosing scattered neutrons from the imploded high-density fusion plasma, a fast response lithium-6 glass scintillator has been developed. Praseodymium, instead of the more widely-used cerium was chosen as the dopant. Sufficiently fast luminescence lifetime for scattered neutron diagnostics (<20 ns) was experimentally observed, and the feasibility was successfully shown in laser-fusion experiments at the GEKKO XII facility of the Institute of Laser Engineering, Osaka University. (C) 2010 Elsevier B.V. All rights reserved.
Custom-Designed Fast-Response Praseodymium-Doped Lithium 6 Fluoro-Oxide Glass Scintillator With Enhanced Cross-Section for Scattered Neutron Originated From Inertial Confinement Fusion 査読

Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Yasunobu Arikawa, Tomoharu Nakazato, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Kei Kamada, Yoshiyuki Usuki, Toshihisa Suyama, Akira Yoshikawa, Nakahiro Sato, Hirofumi Kan

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 57 ( 3 ) 1426 - 1429 2010年6月

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Scintillation properties of Pr(3+)-doped 20Al(PO(3))(3)-80 LiF glasses melted in N(2) were investigated to seek a candidate for a scattered neutron scintillator in nuclear fusion diagnostics. The fluorescence lifetime of the sample with 217 nm ultraviolet femtosecond pulse excitation was measured to be 19.5 ns. More importantly, the fluorescence lifetime with alpha particles from (241)Am radioisotope excitation was determined to be 6.7 ns. Based on our material design strategy, we have successfully developed the fast response time praseodymium-doped (6)Li glass scintillator for scattered neutron diagnostics.
Measurement of preheating due to radiation and nonlocal electron heat transport in laser-irradiated targets 査読

K. Otani, K. Shigemori, T. Kadono, Y. Hironaka, M. Nakai, H. Shiraga, H. Azechi, K. Mima, N. Ozaki, T. Kimura, K. Miyanishi, R. Kodama, T. Sakaiya, A. Sunahara

PHYSICS OF PLASMAS 17 ( 3 ) 2010年3月

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This paper reports an experimental study on preheating of laser-irradiated targets. We performed temperature measurements at the rear surface of laser-irradiated targets under conditions of two different laser wavelengths (0.35 or 0.53 mu m) and several intensities (2 x 10(13) -1 x 10(14) W/cm(2)) in order to verify an effect of radiation and nonlocal electron heat transport. The preheating temperature was evaluated by observing self-emission, reflectivity, and expansion velocity at the rear surface of planar polyimide foils. The experimental results show that the x-ray radiation is dominant for preheating for 0.35-mu m laser irradiation, but contribution of nonlocal electron heat transport is not negligible for 0.53-mu m laser irradiation conditions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3372099]
Experimental investigation to demonstrate Impact Fast Ignition scheme 査読

T. Watari, H. Azechi, M. Nakai, Y. Hironaka, T. Sakaiya, H. Nakamura, H. Shiraga, K. Shigemori, H. Hosoda, Y. Arikawa, H. Homma, T. Norimatsu, M. Murakami, T. Jhozaki, M. Karasik, J. Gardner, J. Bates, D. Colombant, J. Weber, Y. Aglitsky, S. Obenschain

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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We have proposed a new ignition scheme of Fast Ignition, called "Impact Fast Ignition (IFI)", in which a compressed fuel is ignited by impact collision of a fragment of separately imploded fuel. We performed integrated experiments on impact ignition, in which a portion of a deuterated polystyrene (CD) shell was accelerated to about 600 km/s and was collided with precompressed CD fuel. The shell was imploded using 9 beams and the impactor was accelerated using 3 beams of the GEKKO XII laser system. The laser energy was 350 J per beam. The kinetic energy of the impactor was efficiently converted into thermal energy generating a temperature of about 1.8 keV., Observed maximum neutron yield was 2x10(6). This yield was 80 times as large as that without impactor. We will present the experimental details and results, demonstrating the high potential of impact ignition for fusion energy production.
Hugoniot and temperature measurements of liquid hydrogen by laser-shock compression 査読

T. Sano, N. Ozaki, T. Sakaiya, K. Shigemori, M. Ikoma, T. Kimura, K. Miyanishi, T. Endo, A. Shiroshita, H. Takahashi, T. Jitsui, Y. Hori, Y. Hironaka, A. Iwamoto, T. Kadono, M. Nakai, T. Okuchi, K. Otani, K. Shimizu, T. Kondo, R. Kodama, K. Mima

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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Hydrogen at high pressure in the fluid state is of great interest for target design of inertial confinement fusion and understanding the interior structure of gas giant planets. In this work, we successfully obtained the Hugoniot data for liquid hydrogen up to 55 GPa under laser-driven shock loading using impedance matching to a quartz standard. The shocked temperature was determined simultaneously by the brightness temperature. The compression and temperature along the principal Hugoniot are in good agreement with theoretical models. High reflectivity of hydrogen was observed at 40 GPa, which suggests the fluid becomes conducting
High-speed monochromatic x-ray imager for electron temperature mapping of fast igniter plasmas 査読

Minoru Tanabe, Takashi Fujiwara, Shinsuke Fujioka, Nobuo Hayashi, Hiroaki Nishimura, Takeshi Fujimura, Mitsuo Nakai, Keiji Nagai, Hirofumi Homma, Hiroyuki Shiraga, Takayoshi Norimatsu, Hiroshi Azechi, Kunioki Mima

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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We report on experiments aimed at obtaining laser-imploded core plasma temperature maps using two color, monochromatic x-ray imager. This instrument uses two toroidally bent Bragg crystals and a high-speed sampling imager to provide spatial resolution of 25 mu m, temporal resolution of 20 ps, and spectral resolution over 200, simultaneously. Using a deuterated plastic shell target filled with CHClF(2) gas, time-resolved monochromatic x-ray images in the Cl-He(beta) and Cl-Ly(beta) were successfully obtained.
Industrial Applications of Laser Neutron Source 査読

S. Nakai, K. Mima, Y. Kato, K. Tanaka, Y. Ikeda, H. Azechi, K. Miyanaga, M. Nakai, M. Perlado, R. Gonzalez Arrabal

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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The industrial applications of the intense neutron source have been widely explored because of the unique features of the neutron-matter interaction. Usually, intense neutron sources are assembled with fission reactors or high energy ion accelerators. The big size and high cost of these systems are the bottle neck to promote the industrial applications of intense neutrons. In this paper, we propose the compact laser driven neutron source for the industrial application. As the first step of our project for the versatile applications of laser driven neutron source, Li-neutron and/or Li-proton interactions have been investigated for the application to the development of Li battery.
Laser surface inspections: Fundamentals and applications to monitor inner surface conditions of nuclear fusion reactor chambers 査読

Koichi Kasuya, S. Ozawa, T. Norimatsu, H. Azechi, K. Mima, S. Nakai, S. Suzuki, B. Budner, W. Mroz, N. Kasuya, W. Kasuya, Kei Kasuya, Y. Izawa, H. Furukawa, Y. Shimada, T. Yamanaka, M. Nakai, K. Nagai, K. Yokoyama, K. Ezato, M. Enoeda, M. Akiba, A. Prokopiuk

Proceedings of SPIE - The International Society for Optical Engineering 7751 2010年

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The most recent fundamental research results to investigate surface erosions of nuclear fusion candidate chamber materials are described in short. We used a commercial surface profiler with a red semiconductor laser. Various material surfaces ablated and eroded by a rather short pulse electron beam and a short pulse ArF laser light were measured with this surface profiler and the associated three-dimensional analysis software. Threshold input levels for various sample surface erosions with electron and laser beams were clearly decided for the first time with our new method in this article. After the above fundamental results were gathered, the methods to inspect inner surface conditions of nuclear fusion reactor chambers were newly proposed with various kinds of laser displacement sensors. The first one is the erosion monitor with the above profiler, and the second one is the laser induced ultrasonic wave detection method to inspect deeper surface layers than the first one. © 2010 Copyright SPIE - The International Society for Optical Engineering.
Laser Machining for Fabrication of Targets used in the FIREX-I project 査読

T. Fujimura, M. Nakai, A. Iwamoto, N. Hayashi, M. Tanabe, Yu. Izawa, K. Nagai, H. Homma, H. Nishimura, T. Norimatsu, H. Azechi

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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This paper reports on way to fabricate a gas-tight targets dedicated for the first stage of Fast Ignition Realization Experiment (FIREX-I) at the Institute of Laser Engineering (ILE), Osaka University. It was found that a Ti;sapphire laser machining can be used to fabricate the target. The performance of the laser machining using a fs Ti; sapphire laser was examined on shell materials. The conditions for accurate machining were determined. Michelson interferometer with two different wavelengths which imitates a white light interferometer is an excellent tool for confirming the gas-tightness of the target after assembly.
A SCATTERED-NEUTRON DETECTOR FOR AREAL DENSITY MEASUREMENT 査読

Y. Arikawa, T. Murata, S. Fujino, H. Yoshida, K. Yamanoi, T. Nakazato, T. Shimizu, N. Sarukura, M. Nakai, T. Norimatsu, H. Azechi, K. Kamada, Y. Usuki, T. Suyama, A. Yoshikawa, N. Satoh, H. Kan

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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Experimental results are presented on the neutron scintillating properties of a custom-designed Praseodymium-doped Lithium-6 glass for a new deuterium-deuterium (DD) fusion scattered-neutron detector. Luminescence was observed at 278 nm-wavelength, and time-resolved measurement yielded similar to 5.4 ns decay time for neutron excitation. Actual time-of-flight data in laser fusion experiments at the GEKKO XII facility at the Institute of Laser Engineering (ILE), Osaka University reveal that it can clearly discriminate fusion primary-neutrons from the x-ray signals. This material promises the realization of more accurate DD fusion scattered-neutron diagnostics. Design work for a scattered-neutron detector is being conducted for the Fast Ignition Realization Experiment (FIRE-X) at ILE.
Present status and future prospect of Fast Ignition Realization Experiment (FIREX) Project at ILE, Osaka 査読

H. Nishimura, H. Azechi, K. Mima, Y. Fujimoto, S. Fujioka, H. Homma, T. Jitsuno, T. Johzaki, M. Koga, J. Kawanaka, T. Kawasaki, N. Miyanaga, H. Murakami, M. Murakami, H. Nagatomo, N. Morio, K. Nagai, M. Nakai, T. Nakamura, T. Nakazato, Y. Nakata, K. Nishihara, T. Norimatsu, Y. Sakawa, N. Sarukura, K. Shigemori, T. Shimizu, H. Shiraga, K. Sueda, K. Tsubakimoto, A. Iwamoto, T. Mito, H. Sakagami, M. Isobe, T. Ozaki, O. Motojima, R. Kodama, K. A. Tanaka, H. Habara, K. Kondo, Y. Nakao, Y. Sentoku, A. Sunahara, T. Taguchi, T. Kanabe

2ND INTERNATIONAL CONFERENCE ON ULTRA-INTENSE LASER INTERACTION SCIENCE 1209 83 - + 2010年

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Thermonuclear ignition and subsequent burn are key physics for achieving laser fusion. In fast ignition, a highly compressed fusion fuel generated with multiple ns-laser beams is rapidly heated with a large energy, ps-laser pulse in prior to core disassembly. This scheme has a high potential to achieve ignition and burn since driver energy required for high fusion gain is predicted to be about one tenth of that needed for the central ignition scheme. In Japan, Fast Ignition Realization Experiment (FIREX) project has been started to clarify the physics of energy transport and deposition in the core plasma and to demonstrate fuel temperature of above 5 keV. After the success, FIREX-I will be followed by the second phase of the project (FIREX-II) to demonstrate ignition and burn. LFEX laser, designed to deliver a laser pulse of 10 kJ in 10 ps, are operational and the first phase of FIREX experiments has been stated. A new target is proposed to attain dense compression of fuel and improve laser-core coupling efficiency by adopting double-cone structure, a low-density inner liner, low-Z outer coating, and Br-doped fuel shell. In this paper, present status and near term prospects of the FIREX-I project will be reported together with activities on target designing, laser development, and plasma diagnostics.
Pr doped Li-6 glass scintillator for Inertial Confinement Fusion neutron diagnostics 査読

Yasunobu Arikawa, Kouhei Yamanoi, Tomoharu Nakazato, Elmer Surat Estacio, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Youichirou Hironaka, Hiroshi Azechi, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Kei Kamada, Yoshiyuki Usuki, Toshihisa Suyama, Akira Yoshikawa, Nakahiro Sato, Hirofumi Kan

2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS) 2010年

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Experimental results are presented on the properties of a custom-designed fast-response lithium-6 glass scintillator for inertial confinement fusion diagnostics. This newly developed scintillator promises as an indispensable tool in the realization of scattered neutron diagnostics. (C) 2010 Optical Society of America
Study on possible fuel layering sequence for FIREX target 査読

A. Iwamoto, T. Fujimura, M. Nakai, K. Nagai, T. Norimatsu, H. Azechi, R. Maekawa, H. Sakagami

SIXTH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS, PARTS 1-4 244 2010年

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A new procedure of fuel layering for the Fast Ignition Realization Experiment (FIREX) target is proposed. A conical laser guide heating technique was experimentally demonstrated in principle as the followings. It employed the target consisting of a polystyrene (PS) shell, a fill tube and a conical laser guide. At first, liquid fuel was fed into the shell and existed around the conical laser guide because the surface tension of the fuel must cause it. Then, it was solidified. The laser light provided a heat source to the conical laser guide so that the solid fuel was moved to the other interior of the shell. This process resulted in missing solid fuel around the conical laser guide. To fill the vacant space, liquid fuel was added as temperature was raised to the melting point. After the liquid fuel addition, temperature was lowered to the solidification point again. During this process, most of the solid fuel could survive.
Pr3+-doped fluoro-oxide lithium glass as scintillator for nuclear fusion diagnostics 査読

Yasunobu Arikawa, Kohei Yamanoi, Tomoharu Nakazato, Elmer Surat Estacio, Toshihiko Shimizu, Nobuhiko Sarukura, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Kei Kamada, Yoshiyuki Usuki, Toshihisa Suyama, Akira Yoshikawa, Nakahiro Sato, Hirofumi Kan

REVIEW OF SCIENTIFIC INSTRUMENTS 80 ( 11 ) 2009年11月

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Experimental results are presented on the neutron scintillating properties of a custom-designed Pr3+(praseodymium)-doped lithium (Li) glass. Luminescence was observed at 278 nm wavelength, originating from the 5d-4f transition. Time-resolved measurements yielded about 20 ns decay times for ultraviolet and x-ray excitation while much faster decay times of about 6 ns were observed for alpha particle and neutron excitation. Actual time-of-flight data in laser fusion experiments at the GEKKO XII facility of the Institute of Laser Engineering, Osaka University reveal that it can clearly discriminate fusion neutrons from the much stronger x-rays signals. This material can promise improved accuracy in future scattered neutron diagnostics. (C) 2009 American Institute of Physics. [doi:10.1063/1.3254444]
Plasma physics and laser development for the Fast-Ignition Realization Experiment (FIREX) Project 査読

H. Azechi, K. Mima, Y. Fujimoto, S. Fujioka, H. Homma, M. Isobe, A. Iwamoto, T. Jitsuno, T. Johzaki, R. Kodama, M. Koga, K. Kondo, J. Kawanaka, T. Mito, N. Miyanaga, O. Motojima, M. Murakami, H. Nagatomo, K. Nagai, M. Nakai, H. Nakamura, T. Nakamura, T. Nakazato, Y. Nakao, K. Nishihara, H. Nishimura, T. Norimatsu, T. Ozaki, H. Sakagami, Y. Sakawa, N. Sarukura, K. Shigemori, T. Shimizu, H. Shiraga, A. Sunahara, T. Taguchi, K. A. Tanaka, K. Tsubakimoto

NUCLEAR FUSION 49 ( 10 ) 2009年10月

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Since the approval of the first phase of the Fast-Ignition Realization Experiment (FIREX-I), we have devoted our efforts to designing advanced targets and constructing a petawatt laser, which will be the most energetic petawatt laser in the world. Scientific and technological improvements are required to efficiently heat the core plasma. There are two methods that can be used to enhance the coupling efficiency of the heating laser to the thermal energy of the compressed core plasma: adding a low-Z foam layer to the inner surface of the cone and employing a double cone. The implosion performance can be improved in three ways: adding a low-Z plastic layer to the outer surface of the cone, using a Br-doped plastic ablator and evacuating the target centre. An advanced target for FIREX-I was introduced to suit these requirements. A new heating laser (LFEX) has been constructed that is capable of delivering an energy of 10 kJ in 10 ps with a 1 ps rise time. A fully integrated fast-ignition experiment is scheduled for 2009.
Fabrication of aerogel capsule, bromine-doped capsule, and modified gold cone in modified target for the Fast Ignition Realization Experiment (FIREX) Project 査読

Keiji Nagai, H. Yang, T. Norimatsu, H. Azechi, F. Belkada, Y. Fujimoto, T. Fujimura, K. Fujioka, S. Fujioka, H. Homma, F. Ito, A. Iwamoto, T. Jitsuno, Y. Kaneyasu, M. Nakai, N. Nemoto, H. Saika, T. Shimoyama, Y. Suzuki, K. Yamanaka, K. Mima

NUCLEAR FUSION 49 ( 9 ) 2009年9月

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The development of target fabrication for the Fast Ignition Realization EXperiment (FIREX) Project is described in this paper. For the first stage of the FIREX Project (FIREX-I), the previously designed target has been modified by using a bromine-doped ablator and coating the inner gold cone with a low-density material. A high-quality bromine-doped capsule without vacuoles was fabricated from bromine-doped deuterated polystyrene. The gold surface was coated with a low-density material by electrochemical plating. For the cryogenic fuel target, a brand new type of aerogel material, phloroglucinol/formaldehyde (PF), was investigated and encapsulated to meet the specifications of 500 mu m diameter and 20 mu m thickness, with 30 nm nanopores. Polystyrene-based low-density materials were investigated and the relationship between the crosslinker content and the nanopore structure was observed.
Developments of nuclear diagnostics for fast ignition experiments in laser fusion 査読

H. Nakamura, Y. Arikawa, H. Habara, M. Isobe, R. Kodama, M. Koga, M. Nakai, H. Nishimura, T. Ozaki, Y. Sakawa, N. Sarukura, H. Shiraga, Ka. Tanaka, H. Azechi

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 238 2009年8月
TEMPERATURE CONTROL IN A CRYOGENIC TARGET WITH A CONICAL LASER GUIDE FOR FUEL LAYERING 査読

A. Iwamoto, T. Fujimura, M. Nakai, T. Norimatsu, K. Nagai, R. Maekawa, H. Sakagami, T. Mito, O. Motojima, H. Azechi, K. Mima

FUSION SCIENCE AND TECHNOLOGY 56 ( 1 ) 427 - 431 2009年7月

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Fuel layering of a cryogenic target with a conical laser guide such as the FIREX target is complicated because of its non-spherical symmetry appearance. To simplify the layering, a foam layer is planned to utilize as a supporting material of fuel. Ideally, the foam shell has self-fuel-layering ability at a liquid state owing to the capillarity of the foam material. For stable fuel compression in laser experiments, the fuel must be solid with a lower saturated pressure. The transition to a solid state expects to cause random fuel crystallization and voids from the density difference between liquid and solid A volumetric heat load might help to finish fuel layering even in the foam shell. Solid fuel redistribution will ignore the foam boundary. Temperature control in the target, therefore, is required during the formation of a uniform layer. For the rough estimation of the target temperature, the possibility of the ANSYS code was confirmed compared with the experiment using a dummy target. Then, steady state temperature profiles of the FIREX target were calculated using the ANSYS code. Temperature control to practically realize a uniform solid fuel layer in the FIREX target is discussed.
Experimental Evidence of Impact Ignition: 100-Fold Increase of Neutron Yield by Impactor Collision 査読

H. Azechi, T. Sakaiya, T. Watari, M. Karasik, H. Saito, K. Ohtani, K. Takeda, H. Hosoda, H. Shiraga, M. Nakai, K. Shigemori, S. Fujioka, M. Murakami, H. Nagatomo, T. Johzaki, J. Gardner, D. G. Colombant, J. W. Bates, A. L. Velikovich, Y. Aglitskiy, J. Weaver, S. Obenschain, S. Eliezer, R. Kodama, T. Norimatsu, H. Fujita, K. Mima, H. Kan

PHYSICAL REVIEW LETTERS 102 ( 23 ) 2009年6月

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We performed integrated experiments on impact ignition, in which a portion of a deuterated polystyrene (CD) shell was accelerated to about 600 km/s and was collided with precompressed CD fuel. The kinetic energy of the impactor was efficiently converted into thermal energy generating a temperature of about 1.6 keV. We achieved a two-order-of-magnitude increase in the neutron yield by optimizing the timing of the impact collision, demonstrating the high potential of impact ignition for fusion energy production.
Shock Hugoniot and temperature data for polystyrene obtained with quartz standard 査読

N. Ozaki, T. Sano, M. Ikoma, K. Shigemori, T. Kimura, K. Miyanishi, T. Vinci, F. H. Ree, H. Azechi, T. Endo, Y. Hironaka, Y. Hori, A. Iwamoto, T. Kadono, H. Nagatomo, M. Nakai, T. Norimatsu, T. Okuchi, K. Otani, T. Sakaiya, K. Shimizu, A. Shiroshita, A. Sunahara, H. Takahashi, R. Kodama

PHYSICS OF PLASMAS 16 ( 6 ) 2009年6月

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Equation-of-state data, not only pressure and density but also temperature, for polystyrene (CH) are obtained up to 510 GPa. The region investigated in this work corresponds to an intermediate region, bridging a large gap between available gas-gun data below 60 GPa and laser shock data above 500 GPa. The Hugoniot parameters and shock temperature were simultaneously determined by using optical velocimeters and pyrometers as the diagnostic tools and the alpha-quartz as a new standard material. The CH Hugoniot obtained tends to become stiffer than a semiempirical chemical theoretical model predictions at ultrahigh pressures but is consistent with other models and available experimental data.
SMOOTH MEMBRANE FORMATION ON RESORCINOL-FORMALDEHYDE AEROGEL BALLS GELATED USING A BASIC PHASE-TRANSFER CATALYST 査読

Fuyumi Ito, Naotake Nakamura, Keiji Nagai, Mitsuo Nakai, Takayoshi Norimatsu

FUSION SCIENCE AND TECHNOLOGY 55 ( 4 ) 465 - 471 2009年5月

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Low-density foam balls with a diameter of similar to 1 mm were produced from a density-matched emulsion consisting of a resorcinol-formaldehyde (RF) aqueous solution (W) and an exterior oil of carbontetrachloride/(mineral oil) (O). Phase-transfer catalysts such as an alkyl amine were dissolved in the exterior oil, following which the catalyst moved into the RF solution from the exterior oil. A gelation process was monitored by a complete gelation test. When the basic catalysts were used at room temperature as a phase-transfer catalyst, gelation occurred within 30 to 120 min, whereas when the acidic catalyst was used, gelation occurred within 20 to 30 min at room temperature. When similar to 0.39 wt% of triethylamine and tri(n-butyl)amine in the oil phase were based, complete gelation took place. A basic catalyst with a long alkyl chain such as dimethyl(n-hexyl)amine did not induce gelation. The gelated balls obtained using the basic catalyst with a short alkyl chain were dried by extraction using super-critical fluid CO2 and the solvent was replaced with 2-propanol to produce the foam structure. Except 0.39 wt% tri(n-butyl)amine, the basic catalysts yielded foam balls with higher densities of 173 to 184 mg/cm(3) as compared to those obtained from a benzoic acid catalyst, namely, 158 mg/cm(3). The density difference can be attributed to the inclusion of the basic catalyst in the RF solution. Scanning electron microscopy images revealed a surface membrane formation, which can be explained by local concentration at the W/O interface. The cell size of the bulk foam was observed to depend on the catalysts, and it was surmised that the cell sizes varied because of the different gelation rates. A smooth surface membrane tri(n-butyl)amine was used as a catalyst. The membrane obtained on using a basic phase-transfer catalyst was smoother than that obtained on using an acid catalyst. Such a smooth membrane is useful for coating the ablation layer of foam capsule targets.
Manufacturing of leak check of shell targets for FIREX-I project 査読

Takeshi Fujimura, Mitsuo Nakai, Akifumi Iwamoto, Keiji Nagai, Hirofumi Homma, Ken-ichi Tanabe, Takayoshi Norimatsu

Plasma and Fusion Research 4 ( S1010 ) S1010 - S1010 2009年4月

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This article reports the latest progress in the manufacture of shell targets used for the first stage of the Fast Ignition Realization Experiment (FIREX-I). In the project, the targets are cooled to cryogenic temperature and filled with hydrogen isotope fuel through a gas feed tube. If the target has a leak or the gas feeder is blocked, the experiments cannot be carried out successfully and waste much time. The authors have developed a system to check integrity of the targets. SF6 is used instead of H2 or D2 because of its high refractive index and low diffusivity. When SF6 is loaded into the target, the optical path length that passes through a target is longer than that of an evacuated target. The difference can be measured with an interferometer. Analyzing the interference images, it is possible to know whether the gas feeder is blocked and a leak is present. The validity of the system was experimentally confirmed.
Advanced target design for the FIREX-I project 査読

Hiroshi AZECHI, Mitsuo NAKAI, Hirofumi HOMMA, Tomoyuki JOHZAKI, Mayuko KOGA, Kunioki MIMA, Noriaki MIYANAGA, Masakatsu MURAKAMI, Hideo NAGATOMO, Keiji NAGAI, Tatsufumi NAKAMURA, Katsunobu NISHIHARA, Hiroaki NISHIMURA, Takayoshi NORIMATSU, Youichi SAKAWA, Keisuke SHIGEMORI, Hiroyuki SHIRAGA, Akifumi IWAMOTO, Toshiyuki MITO, Hitoshi SAKAGAMI, Osamu MOTOJIMA, Ryosuke KODAMA, Kazuo A. TANAKA, Atsushi SUNAHARA

Plasma Fusion Res. 4 ( S1001 ) S1001 - S1001 2009年4月

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Cryogenically cooled foam shells with deuterium and tritium fuels are expected to be utilized in the fast ignition realization experiment project of ILE, Osaka University, to demonstrate efficient heating of properly compressed fuel plasmas. These targets consist of a foam shell with solid fuel and a conical light guide for additional heating with an ultra-high intensity laser beam, in accordance with previous preliminary experiments [R. Kodama et al., Nature 412, 798 (2001).] Recent theoretical predictions and elemental experiments have suggested some advanced modifications to enhance the coupling efficiency of fast heating and improve implosion performance. The five major points of these improvements are as follows: 1) use of a low-Z foam layer on the inner surface of the cone; 2) use of a double-layered cone as a light guide; 3) use of a low-Z plastic layer on the outer surface of the cone; 4) adding a Br-doped plastic ablator to the fuel capsule; and 5) evacuation of the target center.
Proposal on Temperature Control Procedure of the Cryogenic Target for the FIREX Project 査読

Akifumi Iwamoto, Takeshi Fujimura, Mitsuo Nakai, Takayoshi Norimatsu, Keiji Nagai, Ryuji Maekawa, Hitoshi Sakagami

Plasma and Fusion Research 4 ( S1007 ) S1007 - S1007 2009年4月

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One of the techniques to produce a uniform solid fuel layer for the Fast Ignition Realization EXperiment (FIREX) target is applying a solid fuel redistribution process. During the redistribution process, temperature control is essential for the FIREX target, because a cone guide, also called a conical laser guide, causes temperature non-uniformity. To minimize its temperature distribution, one possible procedure is temperature control at the cone guide. A radiation plate for indirect temperature control, installed next to the cone guide, is proposed. As the heat input to the radiation plate was varied, the temperature profile of the target was calculated using the ANSYS code. The optimal heat input was evaluated. The feasibility of using a radiation plate is discussed.
Ultrathin amorphization of single-crystal silicon by ultraviolet femtosecond laser pulse irradiation 査読

Izawa Yusaku, Tokita Shigeki, Fujita Masayuki, Nakai Mitsuo, Norimatsu Takayoshi, Izawa Yasukazu

JOURNAL OF APPLIED PHYSICS 105 ( 6 ) 2009年3月
Streaked x-ray backlighting with twin-slit imager for study of density profile and trajectory of low-density foam target filled with deuterium liquid 査読

H. Shiraga, N. Mahigashi, T. Yamada, S. Fujioka, T. Sakaiya, K. Shigemori, M. Nakai, H. Azechi, A. Sunahara

REVIEW OF SCIENTIFIC INSTRUMENTS 79 ( 10 ) 2008年10月

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Low-density plastic foam filled with liquid deuterium is one of the candidates for inertial fusion target. Density profile and trajectory of 527 nm laser-irradiated planer foam-deuterium target in the acceleration phase were observed with streaked side-on x-ray backlighting. An x-ray imager employing twin slits coupled to an x-ray streak camera was used to simultaneously observe three images of the target: self-emission from the target, x-ray backlighter profile, and the backlit target. The experimentally obtained density profile and trajectory were in good agreement with predictions by one-dimensional hydrodynamic simulation code ILESTA-1D. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2966458]
Rayleigh-Taylor instability growth on low-density foam targets 査読

T. Watari, M. Nakai, H. Azechi, T. Sakaiya, H. Shiraga, K. Shigemori, S. Fujioka, K. Otani, K. Nagai, A. Sunahara, H. Nagatomo, K. Mima

PHYSICS OF PLASMAS 15 ( 9 ) 2008年9月

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In recent laser fusion programs, foam cryogenic targets have been developed as promising targets which have a great potential to realize efficient nuclear fusion. The foam is porous plastic material having a microstructure inside. We observed the growth of the Rayleigh-Taylor (RT) instability on the foam target with initial surface perturbation for the first time. The measured RT growth rate on the foam target was clearly suppressed in comparison to that of normal-density polystyrene (CH) targets. The values of the RT growth rate for the low-density foam target and the normal-density CH target were 0.84 +/- 0.15 (1/ns) and 1.33 +/- 0.1 (1/ns), respectively. (c) 2008 American Institute of Physics.
Development of TOF Neutron Spectrometer for the measurement of degenerated plasma in Fast Ignition experiment 査読

H. Hosoda, M. Nakai, H. Furukawa, T. Watari, H. Azechi, N. Izumi, Y. Arikawa, Y. Sakawa, S. Dono, T. Fujiwara, K. Mima

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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There are two essential requirements to achieve the Fast Ignition. One is high density compression of main fuel and the other one is additional heating of main fuel by ultra intense laser. Then the experimental determination of both the density of the main fuel before heating laser irradiation and ion temperature after heating laser irradiation is necessary. In the experiment of the Central Ignition, we developed both ion temperature measurement and density measurement, which is based on theoretical degenerated plasma model, by using Time-Of-Flight neutron spectrometer. The main problem in applying this measurement in Fast Ignition experiment is huge amount of high energy x ray, which is generated as a result of heating laser irradiation. Then we installed a total 15-cm thick lead shield as a measure against it. It was confirmed that the newly installed shield achieves x ray attenuation to 5.7 +/- 2.0x10(-4) of previous level by Geant4 MC simulation. And the error for ion temperature measurement was confirmed to be smaller than 0.3 keV in an experiment whose neutron yield was 1.7 +/- 0.2x10(6).
Developments of characterization of the foam shell target for Fast Ignition Realization Experiment-I (FIREX-I) 査読

Fujimura, T, Iwamoto, A, Nakai, M, Norimatsu, T, Nagai, K, Yang, H, Kimura, Y, Sakagami, H, Mito, T, Mima, K

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 32066 2008年
Experimental Investigation of Aerosol Formation in Laser Fusion Reactor Chamber by Discharge Method 査読

T. Ohshige, T. Norimatsu, H. Furukawa, M. Nakai, K. Nagai, K. Mima

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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Liquid wall chambers are one of the most critical technologies in inertial fusion energy (IFE) plants. The critical problem for the liquid wall IFE chamber is the chamber clearance after laser shots. This paper presents preliminary results from an experimental simulation of ablation processes induced by alpha-particle heating.
Fast response neutron scintillation detector for FIRE-X 査読

Y. Arikawa, M. Nakai, T. Watari, H. Hosoda, K. Takeda, T. Fujiwara, Y. Furukawa, T. Norimatsu, H. Shiraga, N. Sarukura, H. Azechi

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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We have been developing fast responding neutron detectors with a view to revealing the effect of additional laser heating in FIREX-I (Fast Ignition Realization Experiment) by measuring the burn time with a time resolution under 100 ps at the relatively low neutron yield (about10(6)). The detector is constructed with a thin plastic-scintillaotor (BC-422), a micro-channel-plate photomultiplier tube (MCP-PMT) and a bundle optical fiber as a light-guide. The rise time of a neutron signal from the detector is measured to be 220 ps. The time-determination error for measuring burn time is estimated to be less the +/- 46 ps from the data of characterization experiments measuring the transit time distribution of signals, and calculated values of Doppler broadening and the uncertainty of the scintillation time due to the thickness of the scintillator. In the future with more neutron yield, we will construct a scintillatiion-fiber-streak camera to detect burn history.
Fabrication and Characterization of Planar Cryogenic Targets for GEKKO-XII 査読

T. X. Huang, M. Nakai, K. Shigemori, H. Shiraga, T. Sakaiya, T. Watari, K. Ohtani, T. Shiota, K. Takeda, O. Maegawa, H. Azechi, M. Nagata, T. Norimatsu, K. Nagai, K. Mima, Y. Izawa, T. Mito, K. Iwamoto

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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A planar cryogenic target system was built to simulate the ablator+fuel shell physics in ICF experimental studies. In the center of the target cell, a sandwich target of liquid deuterium was formed, which has open geometry for conventional side-on and face-on backlighting diagnostics. A set of double-flanges comprised a sealing flange and an extra flange, with which the target thickness could be changed using proper spacers. Furthermore, an interferometric method was used to characterize the cryogenic target before laser shot. The in situ target thickness and bulging shape could be obtained with acceptable accuracy. A typical planar cryogenic target was formed with diameter of 2 mm, which comprised three parts: a 7-m thick polyimide film, a layer of liquid deuterium with the thickness of 119 mu m at the center and 100 mu m at the edge, and another 7-mu m thick polyimide film.
Neutron generation from Impact Fast Ignition 査読

T. Watari, T. Sakaiya, H. Azechi, M. Nakai, H. Shiraga, K. Shigemori, H. Hosoda, H. Saito, Y. Arikawa, Y. Sakawa, S. Fujioka, Y. Hironaka, M. Murakami, M. Karasik, J. Gardner, J. Bates, D. Colombant, J. Weber, S. Obenschain, Y. Aglitsky, P. A. Norreys, S. Eliezer, K. Mima

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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We have proposed a new ignition scheme of Fast Ignition, called "Impact Fast Ignition [1] (IFI)", in which a compressed fuel is ignited by impact collision of a fragment of separately imploded fuel. We have started experiments that used CD colliding foils as the fundamental experiment and integrated experiment of the IFI. In the fundamental experiment, we used targets which are consists of two CD foils (thickness of 20 m) with a 600 m separation. We have irradiated one of the CD foils by laser beams of the energy of 2 kJ in total and accelerated. The accelerated CD foil collides with another foil, and neutrons were generated by the nuclear fusion reaction on the heated foil. In this experiment, we measured the neutron yield of 10(6). In the integrated experiment, we used CD shell targets with a gold cone which had a hemispherical impactor (Fig. 1). The shell was imploded using 9 beams and the impactor was accelerated using 3 beams of the GEKKO XII laser system. The laser energy was 350 J per beam. Observed maximum neutron yield was 2x10(6). This yield was 80 times as large as that without impactor. We will present the experimental details and results.
Application of bubble detector in FIREX program 査読

Osamu Maegawa, Takashi Fujiwara, Mitsuo Nakai, Hiroyuki Shiraga

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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In a Fast Ignition Realization Experiment (FIREX), measurement of the primary and the secondary neutron yield is one of the key diagnostics. However, gamma-ray background generated by an ultra-short pulse laser irradiation makes it difficult to measure the neutron yield in the fast ignition experiment. We adopted a bubble neutron detector as a promising gamma-insensitive detector to be developed and started to examine the feasibility of the detector using commercially available dosimeters provided from BTI inc. [1].
Solution viscosity adjustable phloroglucinolcarboxylic acid / formaldehyde applied in extremely thin shell fusion target fabrication 査読

H. Yang, K. Nagai, M. Nakai, T. Norimatsu

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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Capsuliform fusion target was prepared by using the O(O) / W / O(I) emulsion process. Phloroglucinolcarboxylic acid / formaldehyde (PF) is expected to be used as the water phase (W) solution which then gelates to be the shell of the capsule. The density of the shell should be low to obtain high laser gain. Phloroglucinolcarboxylic acid had addition and condensation reaction with formaldehyde under basic condition to form linear polymer first. The nano-scale linear polymers were then linked via noncovalent interactions, such as hydrogen bonding, van der Waals, to continue the gelation process. The type and amount of the base catalyst used in the reaction can affect the polymerization of PF, including the gelation rate and gelation concentration. By changing the basic condition of the reaction, the proper viscosity of 9x10(-5) for capsuliform target fabrication was reached and extremely thin gel shell thickness of 17 mu m with low polymer concentration of 26.3mg/cm(3) was obtained.
Temperature Measurement of Preheated Planar-Cryogenic Targets 査読

K. Otani, K. Shigemori, D. Ichinose, T. Sakaiya, A. Sunahara, Y. Sakawa, M. Nakai, H. Shiraga, H. Azechi, K. Mima

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 2008年

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The temperature measurement of preheated target is reported. Inertial confinement fusion (ICF) targets should be imploded with a low adiabat for achievement of high density compression. The high energy photons and electrons from ablation plasma can preheat the uncompressed fuel and disturb the low adiabat compression. Preheat has to be evaluated and suppressed for ICF targets. The planar target of cryogenic deuterium was developed for measurement of the self emission from the rear surface. Experiment indicated that the x-ray preheating is more effective than that of non-local electron heat transport at the laser intensity of 10(14) W/cm(2).
Study on a fuel layering sequence of the foam target for the FIREX project 査読

Iwamoto, A, Fujimura, T, Nakai, M, Nagai, K, Norimatsu, T, Maekawa, R, Mito, T, Sakagami, H, Motojima, O, Azechi, H, Mima, K

5TH INTERNATIONAL CONFERENCE ON INERTIAL FUSION SCIENCES AND APPLICATIONS (IFSA2007) 112 32067 2008年
Reduction of the Rayleigh-Taylor instability growth with cocktail color irradiation 査読

K. Otani, K. Shigemori, T. Sakaiya, S. Fujioka, A. Sunahara, M. Nakai, H. Shiraga, H. Azechi, K. Mima

PHYSICS OF PLASMAS 14 ( 12 ) 2007年12月

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A novel method for reducing the Rayleigh-Taylor instability (RTI) growth in inertial confinement fusion (ICF) targets is reported. It is well known that high-density compression of ICF targets is potentially prevented by the RTI. Previous studies [K. Shigemori , Phys. Rev. Lett. 78, 250 (1997), S. G. Glendinning , Phys. Rev. Lett. 78, 3318 (1997), and H. Azechi , Phys. Plasmas 4, 4079 (1997)] have indicated that nonlocal electron heat transport enhances the effect on the ablative stabilization of the RTI growth with long wavelength laser irradiation. Planar target experiments, using a small fraction of a long wavelength laser (lambda=0.53 or 1.05 mu m) in addition to the main drive laser (lambda=0.35 mu m), were conducted to verify the RTI reduction by inducing the effect of the nonlocal electron heat transport. The measured RTI growth rate for this "cocktail-color" laser irradiation was clearly reduced from that for the "single-color" short-wavelength laser irradiation. The experimental growth factors are in good agreement with the ablative RTI formula coupled with a one-dimensional Fokker-Planck simulation code. (c) 2007 American Institute of Physics.
Recent results and future prospects of laser fusion research at ILE, Osaka 査読

K. Mima, K. A. Tanaka, R. Kodama, T. Johzaki, H. Nagatomo, H. Shiraga, N. Miyanaga, M. Murakami, H. Azechi, M. Nakai, T. Norimatu, K. Nagai, T. Taguchi, H. Sakagami

EUROPEAN PHYSICAL JOURNAL D 44 ( 2 ) 259 - 264 2007年8月

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Reviewed are the present status of the fast ignition researches. Since 1997, the fast ignition experiment and theory researches have been extensively continued at the Institute of Laser Engineering of Osaka University. In particular, the cone-shell target experiments and simulation research have been progressing. In order to demonstrate heating of imploded high density plasma to the ignition temperature, in the April of 2003, the construction of heating laser of 10 kJ/10 ps/1.06 mu m (Laser for Fusion Experiment; LFEX), for FIREX-I (Fast Ignition Realization Experiment) has started. The fabrication of DT foam cryogenic cone target is also under development as a collaboration program between Osaka University and NIFS (National Institute for Fusion Science). The LFEX will be completed in 2008. After the completion of LFEX, the foam cryogenic cone shell target experiment will start in 2008. As a new approach toward a compact ignition, an impact fusion has been proposed, where the ablative acceleration to the order of 10(8) cm/s is the key issue. The ablation acceleration related to the impact fusion has been explored by experiments.
Foam structure of xerogel prepared via ring-opening reaction between epoxy groups attached on the side chain of polystyrene 査読

Kentaro Yamanaka, Keiji Nagai, Nobukatsu Nemoto, Kaori Nomura, Tomonori Shimoyama, Kei Tanji, Tomoya Tanji, Mitsuo Nakai, Takayoshi Norimatsu

FUSION SCIENCE AND TECHNOLOGY 51 ( 4 ) 665 - 672 2007年5月

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This paper deals with a new foam material containig polysytrene and its oxirane derivative. A monomer, 4-vinylphenyloxirane (MI), was prepared from 4-chlorostyrene. Polystyrene-based copolymers using styrene and M1 were prepared by free radical copolymerization using azo-bis(isobutyronitrile) (AIBN) as an initiator. The solutions of the obtainedpolystyrene-based copolymers in 4-chlorotoluene were gelated by the addition of a cationic initiator, which caused crosslinking via ring-opening polymerization of the pendant cyclic moieties. SEM images of the dried gel show various foam structures. The formation mechanism of the micro- and nano-structure was explained from the view point of the affinity of the monomer unit and the solvent. The homopolymer of 4-vinyphenylolxirane showed the finest and most uniform structure.
Laser machining of RF foam by second harmonics of Nd : Yag laser 査読

Takeshi Fujimura, Takayoshi Norimatsu, Mitsuo Nakai, Keiji Nagai, Akifumi Iwamoto, Kunioki Mima

FUSION SCIENCE AND TECHNOLOGY 51 ( 4 ) 677 - 681 2007年5月

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A way to make a hole in a resorcinol-formaldehyde (RF) foam shell target is described. A target used in fast ignition (FI) experiments consists of an RF foam shell and a guide cone. The fragile RF foam cannot accept conventional mechanical drilling or laser machining. We used the second harmonics of a Nd:YAG laser (532nm) to bore a hole for the cone by utilizing thermal decomposition of the RF foam.
To optimize the cutting condition, the thermal characteristic and absorption spectrum of the RF foam were measured with a thermo-gravimetric meter and a spectrometer respectively. Then, using these results, relationships between the laser power and cutting speed were optimized for RF foams with several densities.
Preliminary results of fuel layering on the cryogenic target for the firex project 査読

Iwamoto, A, Maekawa, R, Mito, T, Sakagami, H, Motojima, O, Nakai, M, Nagai, K, Fujimura, T, Norimatsu, T, Azechi, H, Mitna, K

FUSION SCIENCE AND TECHNOLOGY 51 ( 4 ) 753 - 757 2007年5月
Comprehensive diagnosis of growth rates of the ablative Rayleigh-Taylor instability 査読

H. Azechi, T. Sakaiya, S. Fujioka, Y. Tamari, K. Otani, K. Shigemori, M. Nakai, H. Shiraga, N. Miyanaga, K. Mima

PHYSICAL REVIEW LETTERS 98 ( 4 ) 2007年1月

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The growth rate of the ablative Rayleigh-Taylor instability is approximated by gamma=root kg/(1+kL)-beta km/rho(a), where k is the perturbation wave number, g the gravity, L the density scale length, m the mass ablation rate, and rho(a) the peak target density. The coefficient beta was evaluated for the first time by measuring all quantities of this formula except for L, which was taken from the simulation. Although the experimental value of beta=1.2 +/- 0.7 at short perturbation wavelengths is in reasonably good agreement with the theoretical prediction of beta=1.7, it is found to be larger than the prediction at long wavelengths.
Encapsulation of low density materials for the first stage of fast ignition realization experiment (FIREX-I) - Control of microstructure and gelation process using a phase-transfer catalyst and tailored polymers 査読

Keiji Nagai, F. Ito, H. Yang, A. Iwamoto, M. Nakai, H. Homma, H. Shiraga, H. Azechi, K. A. Tanaka, R. Kodama, T. Norimatsu, K. Mima

22ND IEEE/NPSS SYMPOSIUM ON FUSION ENGINEERING 33 - + 2007年

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Development of foam capsule fabrication for cryogenically cooled fuel targets is overviewed in the present paper. The fabrication development was initiated as a part of the Fast Ignition Realization Experiment (FIREX) Project at the ILE, Osaka University in the way of bilateral collaboration between Osaka University and National Institute for Fusion Science (NIFS). For the first stage of FIREX (FIREX-1), a foam cryogenic target was designed where low-density foam shells with a conical fight guide will be cooled down to the cryogenic temperature and will be fueled through a narrow pipe. The required diameter and thickness of the capsule are 500 pm and 20 [km, respectively. The material should be low-density plastics foam. We have prepared such capsules using 1) new material of (phloroglucinolcarboxylic acid)/formalin resin to control kinematic viscosity of the precursor, 2) phase-transfer-catalyzed gelation process to keep density matching of three phases of the emulsion. 3) non-volatile silicone oil as outer oil of emulsion in order to prevent hazard halogenated hydrocarbon and flammable mineral oil. The obtained foam capsule had fine structure of 180 nm (outer surface) to 220 nm (inner surface) and uniform thickness reaching to resolution limit of optical analysis (similar to 0.5 mu m). A small hole was made before the solvent exchange and the drying process to prevent distortion due to volume changes. The density of dried foam was 0.29 g/cm(3). After attaching the petawatt laser guiding cone and fueling glass tube, poly([2,2]paracyclophane) was coated on the foam surface and supplied for a fueling test of cryogenic hydrogen.
Progress of impact fast ignition

M. Murakami, H. Nagatomo, T. Sakaiya, S. Fujioka, H. Saito, H. Shiraga, M. Nakai, K. Shigemori, H. Azechi, M. Karasik, J. Gardner, J. Bates, D. Colombant, J. Weaver, A. Schmitt, A. Velikovich, Y. Aglitskiy, J. Sethian, S. Obenshain

34th EPS Conference on Plasma Physics 2007, EPS 2007 - Europhysics Conference Abstracts 31 ( 1 ) 21 - 24 2007年
プラズマ燃焼実験のための先進計測 5.レーザー慣性核融合の燃焼の物理と計測-高速点火実験のための先進計測-

疇地宏, 兒玉了祐, 田辺稔, 反保元伸, 中井光男, 中村浩隆, 西村博明, 藤岡慎介, 古河裕之, 細田裕計, 渡利威士

プラズマ・核融合学会誌 83 ( 12 ) 2007年
Fabrication of low-density solid xenon as laser-produced plasma extreme ultraviolet source 査読

Mizuho Nagata, Takayoshi Norimatsu, Mitsuo Nakai, Keiji Nagai, Nobuyoshi Ueda, Shinsuke Fujioka, Tatsuya Aota, Hiroaki Nishimura, Katsunobu Nishihara, Noriaki Miyanaga, Yasukazu Izawa, Kunioki Mima

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 45 ( 33-36 ) L884 - L886 2006年9月

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A low-density solid xenon (Xe) target has been developed as laser-produced plasma (LPP) extreme ultraviolet (EUV) source. Xe gas was cooled to below the condensation temperature, and liquid Xe was sprayed from a swirl atomizer into a low-pressure atmosphere. Microparticles of liquid Xe were rapidly cooled by their own latent heat of evaporation, and became a solid micrometer-sized powder. The most frequent particle diameter under an atomizing pressure of 0.3 MPa was 114 mu m, and the apparent density was 0.2 g/cm(3) 1/13 of the density of conventional solid Xe. The apparent production rate of the powder was 2.2 cm(3)/s.
Extreme ultraviolet emission from laser-irradiated low-density Xe targets 査読

Nobuyoshi Ueda, Mizuho Nagata, Hiroaki Nishimura, Shinsuke Fujioka, Tatsuya Aota, Yuzuri Yasuda, Yuichi Inubushi, Tsuyoshi Ando, Takayoshi Norimatsu, Mitsuo Nakai, Keiji Nagai, Katsunobu Nishihara, Atsushi Sunahara, Noriaki Miyanaga, Yasukazu Izawa, Kunioki Mima

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 45 ( 7 ) 5951 - 5953 2006年7月

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The effect of the initial density of xenon (Xe) targets on extreme ultraviolet (EUV) emission has been investigated. With decreasing initial density, it was found that the spectral width around 11 nm becomes broad, and the intensity of 13.5 nm emission increases. The maximum conversion efficiency (CE) for solid Xe targets is approximately 0.6% at a 2 x 10(11) W/cm(2) of laser intensity, whereas that for the low-density targets is approximately 0.7% at a 4 x 10(11) W/cm(2). The spectral broadening with decreasing initial density can be attributed to the change in optical thickness of laser-produced plasmas. The enhancement of CE is attributed to optically thick plasma formation.
Conceptual design of laser fusion reactor KOYO-fast - Target design and the fueling system 査読

T. Norimatsu, T. Johzaki, H. Azechi, K. Mima, Y. Nakao, H. Sakagami, H. Shiraga, R. Kodama, H. Nagatomo, T. Endo, A. Iwamoto, H. Yoshida, M. Nakai

JOURNAL DE PHYSIQUE IV 133 841 - 843 2006年6月

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Target design and the fabrication scheme are discussed aiming an application for the future laser fusion reactor KOYO-F that has 4 modular chambers with a wet wall operated with fast ignition scheme. Gain estimation and load of fusion output from the non-symetric burn on the first wall are shown.
Preliminary results on the cryogenic target for FIREX project 査読

A. Iwamoto, R. Maekawa, T. Mito, M. Okamoto, O. Motojima, M. Nakai, T. Norimatsu, K. Nagai

JOURNAL DE PHYSIQUE IV 133 899 - 901 2006年6月

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Preliminary tests on the cryogenic target for the fast ignition realization experiment (FIREX) project has been conducted. A foam shell method is proposed to realize its target design. A foam target consists of three parts: a foam shell, a conical laser guide and a liquid or gas feeder made of glass. The shell is a hollow sphere (500 pm in diameter) with a uniform and thin foam layer (similar to 20 mu m in thickness). Epoxy resin is utilized to assemble the parts into the target. Regarding target fabrication, one of the concerns is the influence on various thermal contractions from the different materials when it is cooled down to cryogenic environment. This paper describes the result on the validity check at cryogenic environment and the demonstration of H-2 liquefaction using a dummy target instead of the foam target.
Recent results and future prospects of laser fusion research at ILE, Osaka 査読

K. Mima, K. A. Tanaka, R. Kodama, T. Johzaki, H. Nagatomo, H. Shiraga, N. Miyanaga, M. Murakami, H. Azechi, M. Nakai, T. Norimatsu, K. Nagai, T. Taguchi, H. Sakagami

JOURNAL DE PHYSIQUE IV 133 27 - 28 2006年6月
Electrochemical fabrication of low density metal foam with mono-dispersed-sized micro- and submicro-meter pore 査読

K Nagai, D Wada, M Nakai, T Norimatsu

FUSION SCIENCE AND TECHNOLOGY 49 ( 4 ) 686 - 690 2006年5月

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This paper deals with the fabrication of low-density metal using micro-template and electrochemical plating techniques. Tin and gold foam films were demonstrated For both cases, porous foam plating required 0.5 V negatively higher bias potential than that for conventional metal plating. The electric current density values for them are smaller than those for bulk metal plating. In spite of these differences, the coulomb efficiency was almost the same as those for bulk metal plating. The density was almost close to the rest of closed packing density; 23 % of bulk metal for gold and 20 % of bulk metal for tin. These low-density foams will be applied for extreme ultraviolet (EUV) generation or other application through laser produced plasma.
Hugoniot measurement of diamond under laser shock compression up to 2 TPa 査読

H Nagao, KG Nakamura, K Kondo, N Ozaki, K Takamatsu, T Ono, T Shiota, D Ichinose, KA Tanaka, K Wakabayashi, K Okada, M Yoshida, M Nakai, K Nagai, K Shigemori, T Sakaiya, K Otani

PHYSICS OF PLASMAS 13 ( 5 ) 2006年5月

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Hugoniot data of diamond was obtained using laser-driven shock waves in the terapascal range of 0.5-2 TPa. Strong shock waves were generated by direct irradiation of a 2.5 ns laser pulse on an Al driver plate. The shock wave velocities in diamond and Al were determined from optical measurements. Particle velocities and pressures were obtained using an impedance matching method and known Al Hugoniot. The obtained Hugoniot data of diamond does not show a marked difference from the extrapolations of the Pavlovskii Hugoniot data in the TPa range within experimental errors. (c) 2006 American Institute of Physics.
Optimization of gelation to prepare hollow foam shell of resorcinol-formalin using a prase-transfer catalyst 査読

F Ito, K Nagai, M Nakai, T Norimatsu

FUSION SCIENCE AND TECHNOLOGY 49 ( 4 ) 663 - 668 2006年5月

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We studied the gelation of an RF foam shell using a phase-transfer catalyst and density-match non-volatile silicon oil. A phase-transfe catalyst circumvent the problem of density-mismatch and achieve gelation at room temperature, by which the catalyst is contained in the outer oil (O-o,) phase, and is then gradually transferred into the RF droplets. For the O-o phase, we used non-volatile silicon oil as a non-hazardous material instead of a toxic (mineral oil)/carbontetrachloride.
Vigorous agitation conditions were optimized based on three experiments. An emulsion was produced using a droplet generator, and was injected into a drum containg a mixture of 0.39% acetic acid and silicon oil. The drum was rotated and its speed were increased to 95 rpm within 15 minutes. Five minutes later, the rotation speed was increased to 120 rpm (maximum rotation speed), which was maintained for 1 minute, there after reduced to 95 rpm for 39 minutes.
Polystyrene based foam materials for cryogenic targets of fast ignition realization experiment (FIREX) 査読

N Nemoto, K Nagai, Y Ono, K Tanji, T Tanji, M Nakai, T Norimatsu

FUSION SCIENCE AND TECHNOLOGY 49 ( 4 ) 695 - 700 2006年5月

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This paper deals with the development of materials without volume change in the formation of uniform low density foam capsules with fine structures. Two monomers, i.e., 5-(4-vinylbenzyl)oxymethyl-5-methyl-1,3dioxane-2-thione (M1) and 4-vinylphenyloxirane (M2), were prepared as the comonomers polymerized with styrene. Polystyrene-based copolymers using styrene and M1 or M2 were prepared by free radical copolymerization using azobis(isoburyronitrile) (AIBN) as an initiator. The solutions of the obtained polystyrene-based copolymers in benzenel/dichloromethane mixture or 4-chlorotoluene were gelated by the addition of a cationic initiator, which caused cross-linking via ring-opening polymerization of the pendant cyclic moieties. The gel was transformed into an aerogel by exchanging solvent to 2-propanol, and removal of 2-propanol using supercritical CO2. SEM images of a cross sectional view of the aerogel indicated that sub-micrometer voids were distributed randomly, and most of parts look filled bulk morphology. The density of the gel obtained from the present polystyrene-based copolymers was estimated to be 200 mg/cm(3), which implies existence of vacancies without observation in the SEM image, suggesting the extremely fine cell structure.
Tin-polymer composite on a rotating drum as a high repetition rate laser target for extreme ultraviolet generation 査読

Y Yasuda, QC Gu, K Nagai, M Nakai, T Norimatsu, S Fujioka, H Nishimura, M Nakatsuka

FUSION SCIENCE AND TECHNOLOGY 49 ( 4 ) 691 - 694 2006年5月

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High repetition rate irradiation of a laser on target is necessary for practical operation of an extreme ultraviolet (EUV) light source. A rotating drum with a tin composite film was fabricated for this purpose. Uniformly tin-dispersed plastic film was prepared from hydroxypropyl cellulose (HPC) and tin source solution of SnCl4/ethanol/H2O. It was transparent in the visible to near infrared region. The film was coated on an aluminum rotating drum from HPC-Sn solution. When this solution was coated on aluminum rotating target drum directly, the drum was corroded. Therefore an alternative method was developed starting with tin(tertbutoxide) instead of SnCl4. The later solution was used for coating on aluminum rotating target drum directly.
Low-density-plastic-foam capsule of resorcinol/formalin and (phloroglucinolcarboxylic acid)/formalin resins for fast-ignition realization experiment (FIREX) in laser fusion research 査読

F Ito, K Nagai, M Nakai, T Norimatsu, A Nikitenko, S Tolokonnikov, E Koresheva, T Fujimura, H Azechi, K Mima

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 45 ( 8-11 ) L335 - L338 2006年3月

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In this report, we describe fuel (deuterium and tritium) Capsule preparation for the fast-ignition realization experiment (FIREX) in laser fusion research. The required diameter and thickness of the capsule are 500 and 20 pill, respectively. The material Should be plastics with low-density foam. We have prepared such a capsule using (1) a new material of (phloroglucinolcarboxylic acid)/formalin resin to control the kinematic viscosity of the precursor, (2) the phase-transfer-catalyzed gelation process to maintain the density matching of the emulsion. The obtained foam capsule had a fine structure of 180 run (outer surface) to 220 run (inner surface) size and a uniform thickness reaching the resolution limit of optical analysis (similar to 0.5 mu m).
Cool-down performance of the apparatus for the cryogenic target of the FIREX project 査読

A. Iwamoto, R. Maekawa, T. Mito, M. Okamoto, O. Motojima, S. Sugito, K. Okada, M. Nakai, T. Norimatsu, K. Nagai

Fusion Engineering and Design 81 ( 8-14 PART B ) 1647 - 1652 2006年2月

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The apparatus for cryogenic target experiments of the Fast Ignition Realization EXperiment (FIREX) project has been developed at the National Institute for Fusion Science (NIFS). To achieve the target specifications for the project, the foam shell method has been proposed. The Institute of Laser Engineering (ILE), Osaka University and NIFS have started a cooperative study of the method. NIFS is responsible for the demonstration of the fuel layering process. The first cool-down test of the apparatus was conducted. Its cool-down performance is described in this paper. © 2005 Elsevier B.V. All rights reserved.
Angular distribution control of extreme ultraviolet radiation from laser-produced plasma by manipulating the nanostructure of low-density SnO2 targets 査読

K Nagai, QC Gu, ZZ Gu, T Okuno, S Fujioka, H Nishimura, YZ Tao, Y Yasuda, M Nakai, T Norimatsu, Y Shimada, M Yamaura, H Yoshida, M Nakatsuka, N Miyanaga, K Nishihara, Y Izawa

APPLIED PHYSICS LETTERS 88 ( 9 ) 2006年2月

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We have found that the divergence of a relatively monochromatic extreme ultraviolet (EUV) emission from a laser-produced plasma can be manipulated by changing the target morphology which is a porous low-density tin oxide (SnO2) structure. The fundamental light of a Nd-YAG laser was irradiated on the target with laser intensity of similar to 10(11) W/cm(2) and pulse duration of 10 ns. The nanostructure and density of the targets were tuned by a combination of colloidal polymer template and sol-gel processes [Gu, Nagai, Norimatsu, Fujioka, Nishimura, Nishihara, Miyanaga, and Izawa, Chem. Mater. 17, 1115 (2005)], which has a merit in large-scale preparation. When the target has an open cell nanostructure, the EUV emission directed predominantly along target normal, while a closed cell target exhibited divergent emission. The angular distribution may be affected by the orientation of the microstructured initial target, and this phenomenon can be applied to wavefront control of EUV emission.
Ultrafast x-ray imaging with sliced sampling streak cameras 査読

TX Huang, M Nakai, H Shiraga, H Azechi, TX Huang, YK Ding, ZJ Zheng

REVIEW OF SCIENTIFIC INSTRUMENTS 77 ( 2 ) 2006年2月

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The ultrafast imaging methods in sliced sampling streak cameras are investigated. It is shown that the sampling-image x-ray streak camera has potential advantages in highly time-resolved and space-resolved imaging for imploded core plasmas. An optimized sampling method is presented to acquire two-dimensional spatial resolutions <= 10 mu m and temporal resolution similar to 10 ps, within a field of view similar to 100 mu m and a time range similar to 100 ps.
Polymorphic tin dioxide synthesis via sol-gel mineralization of ethyl-cyanoethyl cellulose lyotropic liquid crystals 査読

Qincui Gu, Keiji Nagai, Mitsuo Nakai, Takayoshi Norimatsu

Colloid and Polymer Science 284 ( 4 ) 429 - 434 2006年1月

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The polymorphic tin dioxide (SnO2) was synthesized by calcinating the sol-gel mineralized hybrid of the tin source solution (SnC14/ethanol/H2O) and the lyotropic liquid crystal of ethyl-cyanoethyl cellulose((E-CE)C)/acrylic acid (AA). The sub-micrometer SnO2 spheres with bimodal distribution at 370 and 860 nm were obtained after calcinating the hybrid at 400 °C for 5 h. When the hybrid was exposed to ultraviolet first and then calcinated the flying-saucer-like SnO2 was formed. The exposure time was found to influence the morphology of the as-prepared SnO2. Except for the spherical and the flying-saucer-like SnO2, a small amount of well-developed polyhedral SnO2 was also observed in the as-prepared samples. On this basis, the lyotropic liquid crystal of (E-CE)C/AA afforded a novel route to obtain polymorphic SnO2. © Springer-Verlag 2005.
Equation of state of diamond under shock compression up to 2 TPa 査読

H. Nagao, K. G. Nakamura, K. Kondo, N. Ozaki, T. Ono, K. Takamatsu, K. A. Tanaka, K. Nagai, M. Nakai, K. Wakabayashi, K. Okada, M. Yoshida

Shock Compression of Condensed Matter - 2005, Pts 1 and 2 845 111 - 114 2006年

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The equation of state of diamond was studied using laser-driven shock waves in a terapascal region between 0.5 and 2 TPa. Strong shock waves were generated by direct irradiation of a 2.5 ns laser pulse on an Al driver plate. The shock wave velocities in the diamond and Al were measured optically. Particle velocities and pressures were obtained using impedance matching and the known Al Hugoniot. The dependence of U-s(Dia)(u(p)(Dia)) obtained for single crystalline diamond is well-approximated by U-s(Dia)=11.2+1.2u(p)(Dia) for the obtained Hugoniot data, all previous experimental data, and the bulk sound velocity.
Observation of Xenon EUV Spectra in Compact Helical System 査読

SUZUKI Chihiro, NISHIMURA Hiroaki, SONG Mi-Young, KATO Takako, OKAMURA Shoichi, MORE Richard, NISHIHARA Katsunobu, NAKAI Mitsuo, SHIGEMORI Keisuke, FUJIOKA Shinsuke, OGAWA Hiroaki, SASAKI Akira

Journal of Plasma and Fusion Research SERIES 7 73 - 76 2006年

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We have carried out spectroscopic measurements of xenon (Xe) extreme ultraviolet (EUV) emissions in plasmas produced by a medium-size fusion-oriented torus device, Compact Helical System (CHS), for the development of reliable spectroscopic data of Xe ions. The EUV spectra have been measured in low density (<1019 m?3) hydrogen plasma with Xe gas injection by an existing grazing incidence spectrometer. Electron density and temperature profiles are measured by Thomson scattering diagnostic. Observed spectral lines arecompared with the results of HULLAC code calculation and charge exchanging collisions experiment. The charge states of Xe ions and transitions are inferred for several prominent peaks.
Towards realization of hyper-velocities for impact fast ignition 査読

M. Murakami, H. Nagatomo, T. Sakaiya, H. Azechi, S. Fujioka, H. Shiraga, M. Nakai, K. Shigemori, H. Saito, S. Obenschain, M. Karasik, J. Gardner, J. Bates, D. Colombant, J. Weaver, Y. Aglitskiy

Plasma Physics and Controlled Fusion 47 ( 12 B ) B815 - B822 2005年12月

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A new ignition scheme, impact fast ignition (IFI), is studied, in which the compressed DT main fuel is to be ignited by impact with another fraction of separately imploded DT fuel, which is accelerated in the hollow conical target. The first and distinct milestone in the IFI scenario is the demonstration of such a hyper-velocity, of the order of 108 cm s-1. Two-dimensional hydrodynamic simulation results obtained in full geometry using plastic instead of DT fuel are presented, in which some key physical parameters for the impact shell dynamics, such as an implosion velocity of 108 cm s-1, a compressed density of 300-400 g cm-3 and a converted temperature greater than 5 keV, are demonstrated. A preliminary experimental result with a planar target is presented to show the highest velocity, 6 × 107 cm s-1, ever achieved. © 2005 IOP Publishing Ltd.
Dynamic imaging of 13.5 nm extreme ultraviolet emission from laser-produced Sn plasmas 査読

Y Tao, H Nishimura, T Okuno, S Fujioka, N Ueda, M Nakai, K Nagai, T Norimatsu, N Miyanaga, K Nishihara, Y Izawa

APPLIED PHYSICS LETTERS 87 ( 24 ) 2005年12月

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Temporally resolved imaging of 13.5 nm extreme ultraviolet (EUV) emission from laser-produced Sn plasmas was experimentally investigated with a monochromatic EUV imager. Absorption caused by the surrounding plasma was eliminated by adopting a stripe Sn target laminated on a plastic film so that the CH plasma tamped lateral expansion of the Sn plasma. The experimental results revealed that reabsorption induced by plasma, both in EUV emission-dominant and long scale coronal regions, plays an key role in extracting the EUV light from the plasma efficiently. (c) 2005 American Institute of Physics.
Opacity effect on extreme ultraviolet radiation from laser-produced tin plasmas 査読

S Fujioka, H Nishimura, K Nishihara, A Sasaki, A Sunahara, T Okuno, N Ueda, T Ando, YZ Tao, Y Shimada, K Hashimoto, M Yamaura, K Shigemori, M Nakai, K Nagai, T Norimatsu, T Nishikawa, N Miyanaga, Y Izawa, K Mima

PHYSICAL REVIEW LETTERS 95 ( 23 ) 2005年12月

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Opacity effects on extreme ultraviolet (EUV) emission from laser-produced tin (Sn) plasma have been experimentally investigated. An absorption spectrum of a uniform Sn plasma generated by thermal x rays has been measured in the EUV range (9-19 nm wavelength) for the first time. Experimental results indicate that control of the optical depth of the laser-produced Sn plasma is essential for obtaining high conversion to 13.5 nm-wavelength EUV radiation; 1.8% of the conversion efficiency was attained with the use of 2.2 ns laser pulses.
Resorcinol-formalin foam balls via gelation of emulsion using phase-transfer catalysts 査読

Fuyumi Ito, Keiji Nagai, Mitsuo Nakai, Takayoshi Norimatsu

Macromolecular Chemistry and Physics 206 ( 21 ) 2171 - 2176 2005年11月

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Highly spherical (98.5%) low-density foam balls with 1-mm diameters were fabricated from a density-matched emulsion consisting of a resorcinol/formalin aqueous solution and a (mineral oil and carbon tetrachloride) mixture. Phase-transfer catalysts of carboxylic acid were utilized to induce gelation of the emulsion. The gelation process was monitored by a mechanical test. Gelation forming ball shapes happened within 20-30 min, depending on the catalysts, at room temperature. The gelation time decreased with high-catalyst concentration. Acids with long alkyl chains did not induce gelation and no balls were obtained. The gelated balls were dried to obtain foam via an exchange of the solvent with 2-propanol and extraction using the supercritical fluid CO2. The density obtained from the catalyst was 0.15-0.16 g · cm-3. SEM images revealed surface membrane formation, which can be explained by local concentration at the interface of W/O. We observed different bulk foam cell sizes, which may depend on the catalysts and, therefore, on the different gelation rates. © 2005 WILEY-VCH Verlag GmbH &amp
Co. KGaA, Weinheim.
Foam materials for cryogenic targets of fast ignition realization experiment (FIREX) 査読

K Nagai, H Azechi, F Ito, A Iwamoto, Y Izawa, T Johzaki, R Kodama, K Mima, T Mito, M Nakai, N Nemoto, T Norimatsu, Y Ono, K Shigemori, H Shiraga, KA Tanaka

NUCLEAR FUSION 45 ( 11 ) 1277 - 1283 2005年11月

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Development of foam materials for cryogenically cooled fuel targets is described in this paper. The fabrication development was initiated as a part of the fast ignition realization experiment (FIREX) project at the ILE, Osaka University under a bilateral collaboration between OsakaUniversity and National Institute for Fusion Science (NIFS). For the first stage of FIREX (FIREX-1), a foam cryogenic target was designed in which low-density foam shells with a conical light guide will be fuelled through a narrow pipe and will be cooled down to the cryogenic temperature. Acrylic polymer, resorcinol-formaldehyde (RF) resin, poly(4-methyl-1-pentene) (PMP), and polystyrene-based crosslinking polymer have been investigated as supporting materials for cryogenic fuel. The properties of the material and the present status of the material development are summarized.
Characterization of density profile of laser-produced Sn plasma for 13.5 nm extreme ultraviolet source 査読

Y Tao, H Nishimura, S Fujioka, A Sunahara, M Nakai, T Okuno, N Ueda, K Nishihara, N Miyanaga, Y Izawa

APPLIED PHYSICS LETTERS 86 ( 20 ) 2005年5月

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We investigated the electron density profile corresponding to the dominant extreme ultraviolet (EUV) emission from a laser-produced Sn plasma using a combination of a green and an UV interferometer. A comparison between experimental results and a one-dimensional radiation hydrodynamic simulation shows reasonable agreement, and the discrepancy could be attributed to three-dimensional plasma expansion. It was found that, due to opacity effects, most of the EUV light comes from an under-dense plasma region. (c) 2005 American Institute of Physics.
Present status of fast ignition research and prospects of FIREX project 査読

K Mima, H Azechi, Y Johzaki, Y Kitagawa, R Kodama, Y Kozaki, N Miyanaga, K Nagai, H Nagatomo, M Nakai, H Nishimura, T Norimatsu, H Shiraga, KA Tanaka, Y Izawa, Y Nakao, H Sakagami

FUSION SCIENCE AND TECHNOLOGY 47 ( 3 ) 662 - 666 2005年4月

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This is the review on the laser fusion research at Institute of Laser Engineering of Osaka University. Since 1996, we have concentrated our efforts on fast ignition laser fusion research. By constructing 100 TW and 1 Peta watt lasers, experiments on relativistic laser plasma interactions related to fast ignition and pellet implosion and heating have been carried out. The results indicate that imploded core plasma is heated with relatively high coupling efficiency. According to the above results, we started the FIREX (Fast Ignition Realization Experiment) project for demonstrating ignition and burn with a multi 10kJ short pulse laser. The future prospects of the project are presented in this paper.
Characterization of extreme ultraviolet emission from laser-produced spherical tin plasma generated with multiple laser beams 査読

Y Shimada, H Nishimura, M Nakai, K Hashimoto, M Yamaura, Y Tao, K Shigemori, T Okuno, K Nishihara, T Kawamura, A Sunahara, T Nishikawa, A Sasaki, K Nagai, T Norimatsu, S Fujioka, S Uchida, N Miyanaga, Y Izawa, C Yamanaka

APPLIED PHYSICS LETTERS 86 ( 5 ) 2005年1月

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Spherical solid tin targets were illuminated uniformly with twelve beams from the Gekko XII laser system to create spherical plasmas, and the extreme ultraviolet (EUV) emission spectra from the plasmas were measured. The highest conversion efficiency of 3% to 13.5 nm EUV light in 2% bandwidth was attained for an irradiance of around 5 x 10(10) W/cm(2). The experimental results were reproduced fairly well using a theoretical model taking the power balance in the plasma into consideration. (C) 2005 American Institute of Physics.
Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target

Yoneyoshi Kitagawa, Yasuhiko Sentoku, Shin Akamatsu, Wataru Sakamoto, Kazuo A. Tanaka, Ryosuke Kodama, Hiroaki Nishimura, Yuichi Inubushi, Mitsuo Nakai, Takeshi Watari, Takayoshi Norimatsu, Atsushi Sunahara

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 71 ( 1 ) 2005年1月

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A uniformly imploded deuterated polystyrene (CD) shell target is fast-heated by a Petawatt (PW) laser without cone guide. The best illumination timing is found to be in a narrow region around 80±20 picoseconds from the onset of the stagnation phase, where thermal neutrons are enhanced four to five times by the PW laser of energy less than 10% of the implosion laser. The timing agrees with the timings of enhancement of the x-ray emission from the core and reduction of the bremsstrahlung radiation from scattered hot electrons. The PW laser, focused to the critical density point, generates the energetic electrons within as narrow an angle as 30°, which then heats the imploded CD shell to enhance thermal neutrons. These results first demonstrate that the PW laser directly heats the imploded core without any conelike laser guide. © 2005 The American Physical Society.
Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target 査読

Y Kitagawa, Y Sentoku, S Akamatsu, W Sakamoto, KA Tanaka, R Kodama, H Nishimura, Y Inubushi, M Nakai, T Watari, T Norimatsu, A Sunahara

PHYSICAL REVIEW E 71 ( 1 ) 2005年1月

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A uniformly imploded deuterated polystyrene (CD) shell target is fast-heated by a Petawatt (PW) laser without cone guide. The best illumination timing is found to be in a narrow region around 80 20 picoseconds from the onset of the stagnation phase, where thermal neutrons are enhanced four to five times by the PW laser of energy less than 10% of the implosion laser. The timing agrees with the timings of enhancement of the x-ray emission from the coreand reduction of the bremsstrahlung radiation from scattered hot electrons. The PW laser, focused to the critical density point, generates the energetic electrons within as narrow an angle as 30degrees, which then heats the imploded CD shell to enhance thermal neutrons. These results first demonstrate that the PW laser directly heats the imploded core without any conelike laser guide.
Equation-of-state measurements for polystyrene at multi-TPa pressures in laser direct-drive experiments 査読

N. Ozaki, T. Ono, K. Takamatsu, K. A. Tanaka, M. Nakano, T. Kataoka, M. Yoshida, K. Wakabayashi, M. Nakai, K. Nagai, K. Shigemori, T. Yamanaka, K. Kondo

Physics of Plasmas 12 ( 12 ) 1 - 4 2005年

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Equation-of-state (EOS) measurements for polystyrene in TPa (10 Mbar) pressure regions are presented. Polystyrene Hugoniot data were obtained up to 2.7 TPa using impedance matching techniques with laser direct drive at the GEKKO/HIPER laser facility [N. Miyanaga, in Proceedings of the 18th International Conference on Fusion Energy (IAEA, Sorrento, Italy, 2001), IAEA-CN-77] The results were compared with theoretical models and previous experimental data and found to be in good agreement with the previous data obtained by different drive and diagnostic techniques. © 2005 American Institute of Physics.
Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement

Yoneyoshi Kitagawa, Shin Akamatsu, Wataru Sakamoto, Kazuo A. Tanaka, Ryosuke Kodama, Hiroaki Nishimura, Yuichi Inubushi, Mitsuo Nakai, Takeshi Watari, Takayoshi Norimatsu, Atsushi Sunahara, Yasuhiko Sentoku

Inertial Fusion Sciences and Applications 2003 387 - 393 2004年12月

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To heat an uniformly imploded deuterated polystyrene shell target, Petawatt laser illumination timing is scanned from the implosion, through stagnation to expansion or disruption phases. After 80 ± 20 picosecond from the onset of the stagnation phase but yet within it, thermal neutrons are four times enhanced from l × 106. The timing exactly agrees with that of X-ray emission from the core. In the stagnation phase, beam fusion neutrons reduced to 1.5 times the thermal one. Temporal behaviours of Bremsstrahlung due to hot electrons and laser backscatterings support the the timing.
Two-dimensional ablation density measurement relevant to Rayleigh-Taylor instability with fresnel phase zone plate

Yohei Tamari, Hiroshi Azechi, Shinsuke Fujioka, Tatsuhiro Sakaiya, Hiroyuki Shiraga, Mitsuo Nakai, Keisuke Sigemori

Inertial Fusion Sciences and Applications 2003 182 - 185 2004年12月

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Fresnel phase zone plate (FPZP) can image hard x rays (>5 keV) with high spatial resolution of a few μm. In FPZP image, a structured background overlaps on an image. The image intensity profile cannot be obtained accurately. We have resolved this problem of structured background, and obtained plasma intensity profile within 10% error. Using FPZP, the plasma density measurement experiment has been demonstrated. The density profile of in-flight polystyrene plasma has been measured at several different times. The experimental density profiles have been compared with the calculated results by 1-D simulation code. The experiment data agreed with the simulation results.
Fast plasma heating in a cone-attached geometry - towards fusion ignition 査読

R Kodama, H Azechi, H Fujita, H Habara, Y Izawa, T Jitsuno, T Jozaki, Y Kitagawa, K Krushelnick, T Matsuoka, K Mima, N Miyanaga, K Nagai, H Nagatomo, M Nakai, H Nishimura, T Norimatsu, P Norreys, K Shigemori, H Shiraga, A Sunahara, KA Tanaka, M Tanpo, Y Toyama, K Tsubakimoto, T Yamanaka, M Zepf

NUCLEAR FUSION 44 ( 12 ) S276 - S283 2004年12月

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We have developed a PW (0.5 ps/500J) laser system to demonstrate fast heating of imploded core plasmas using a hollow cone shell target. Significant enhancement of thermal neutron yield has been realized with PW-laser heating, confirming that the high heating efficiency is maintained as the short-pulse laser power is substantially increased to a value nearly equivalent to the ignition condition. It appears that the efficient heating is realized by the guiding of the PW laser pulse energy within the hollow cone and by self-organized relativistic electron transport. Based on the experimental results, we are developing a 10kJ-PW laser system to study the fast heating physics of high-density plasmas at an ignition-equivalent temperature.
Suppression of the Rayleigh-Taylor instability and its implication for the impact ignition 査読

H Azechi, H Shiraga, M Nakai, K Shigemori, S Fujioka, T Sakaiya, Y Tamari, K Ohtani, M Murakami, A Sunahara, H Nagatomo, K Nishihara, N Miyanaga, Y Izawa

PLASMA PHYSICS AND CONTROLLED FUSION 46 B245 - B254 2004年12月

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The Rayleigh-Taylor (RT) instability with material ablation through an unstable interface is the key physics that determines the success or failure of inertial fusion energy (IFE) generation, as the RT instability potentially quenches ignition and burn by disintegrating the IFE target. We present two suppression schemes of the RT growth without significant degradation of the target density. The first scheme is to generate a double ablation structure in high-Z doped plastic targets. In addition to the electron ablation surface, a new ablation surface is created by x-ray radiation from the high-Z ions. Contrary to the previous thought, the electron ablation surface is almost completely stabilized by extremely high flow velocity. On the other hand, the RT instability on the radiative ablation surface is significantly moderated. The second is to enhance the nonlocal nature of the electron heat transport by illuminating the target with long wavelength laser light, whereas the high ablation pressure is generated by irradiating with short wavelength laser light. The significant suppression of the RT instability may increase the possibility of impact ignition which uses a high-velocity fuel colliding with a preformed main fuel.
Temporally resolved Schwarzschild microscope for the characterization of extreme ultraviolet emission in laser-produced plasmas

Y Tao, M Nakai, H Nishimura, S Fujioka, T Okuno, T Fujiwara, N Ueda, N Miyanaga, Y Izawa

REVIEW OF SCIENTIFIC INSTRUMENTS 75 ( 12 ) 5173 - 5176 2004年12月

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A temporally resolved monochromatic extreme ultraviolet (EUV) imager has been developed for use in EUV radiation source research. The imager consists of a Schwarzschild microscope, with near-normal-incident Mo/Si multilayer mirrors adjusted for 13.5 nm and 4% bandwidth, and an x-ray streak camera (XSC). The spatial resolution of the microscope was limited by the image detector's resolution to 3.5 mum for the CCD camera and 15 mum for the XSC, respectively, for a field of view of 1.2 mm. With the high photon collection efficiency, clear streak images could be obtained on a single-shot basis with laser pulse energy as low as 50 mJ at an intensity of 1x10(10) W/cm(2). Expansion behavior of the EUV emission region was successfully observed for laser-produced Sn plasmas. (C) 2004 American Institute of Physics.
Suppression of the Rayleigh-Taylor instability due to self-radiation in a multiablation target

Shinsuke Fujioka, Atsushi Sunahara, Katsunobu Nishihara, Naofumi Ohnishi, Tomoyuki Johzaki, Hiroyuki Shiraga, Keisuke Shigemori, Mitsuo Nakai, Tadashi Ikegawa, Masakatsu Murakami, Keiji Nagai, Takayoshi Norimatsu, Hiroshi Azechi, Tatsuhiko Yamanaka

Physical Review Letters 92 ( 19 ) 1 - 195001 2004年5月

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The suppression of the Rayleigh-Taylor instability that occurs due to self-Radiation in a multiablation target was investigated. It was demonstrated that in a high-Z doped plastic target, two ablation surfaces were formed separately, one driven by thermal radiation and the other driven by electron conduction. It was found that the growth of the Rayleigh-Taylor instability was significantly suppressed on the radiation-driven ablation surface inside the target becasue of a large ablation velocity and long density scale length. Using a brominated plastic target, a significant reduction in growth rate was observed.
Suppression of Rayleigh-Taylor instability due to radiative ablation in brominated plastic targets

S Fujioka, A Sunahara, N Ohnishi, Y Tamari, K Nishihara, H Azechi, H Shiraga, M Nakai, K Shigemori, T Sakaiya, M Tanaka, K Otani, K Okuno, T Watari, T Yamada, M Murakami, K Nagai, T Norimatsu, Y Izawa, S Nozaki, YW Chen

PHYSICS OF PLASMAS 11 ( 5 ) 2814 - 2822 2004年5月

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Suppression of hydrodynamic instabilities is very crucial for the ultimate goal of inertial fusion energy (IFE). A high-Z doped plastic of CHBr (brominated polystyrene) ablator is a very promising candidate to suppress the ablative Rayleigh-Taylor (RT) instability in a directly laser-driven IFE target. When a CHBr target is irradiated by intense laser beams, bromine atoms in the corona plasma emit strong radiation. The strong radiation drives the radiative ablation front inside the CHBr targets. This radiative ablation in the high-Z doped plastic target has many advantages for the suppression of the growth of the RT instability in analogy to the indirect-drive approach, i.e., large mass ablation rate, long density scale length and low peak density. Two-dimensional (2D) hydrodynamic simulation shows significant suppression of the RT instability in a CHBr target compared to an undoped polystyrene (CH) target. RT growth rate, calculated theoretically using the Betti-Goncharov procedure with a one-dimensional radiation-hydrodynamic simulation code, is in good agreement with the 2D calculations. Experiments were performed at the GEKKO XII- [C. Yamanaka , IEEE J. Quantum Electron. QE-17, 1639 (1981)] HIPER (High Intensity Plasma Experimental Research) laser facility. The trajectory of a laser-driven CHBr target observed in the experiment was reproduced fairly well by the simulation. The radiative ablation front formed inside a directly laser-driven CHBr target was clearly observed for the first time. The strong suppression of the RT instability in the CHBr target was confirmed using the face-on and side-on x-ray backlighting technique. The high-Z doped ablator can be applied to high density cryogenic deuterium-deuterium and deuterium-tritium compression, because the hydrogen-isotopes are nearly transparent to x rays, which are transmitted through the ablator from the laser-irradiation side. (C) 2004 American Institute of Physics.
GEKKO/HIPER-driven shock waves and equation-of-state measurements at ultrahigh pressures

N Ozaki, KA Tanaka, T Ono, K Shigemori, M Nakai, H Azechi, T Yamanaka, K Wakabayashi, M Yoshida, H Nagao, K Kondo

PHYSICS OF PLASMAS 11 ( 4 ) 1600 - 1608 2004年4月

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The GEKKO/HIPER-laser [N. Miyanaga et al., in Proceedings of the 18th International Conference on Fusion Energy (IAEA, Sorrento, Italy, 2001), IAEA-CN-77] driven shock experiments were characterized in detail for studies on equation-of-state (EOS) at ultrahigh pressures. High-quality shock waves were produced with the bundled 9 laser beams optically smoothed by spectral dispersion technique and Kinoform phase plates. The laser beams were directly focused on targets at up to an intensity of 10(14) W/cm(2) or higher with a wavelength of 351 nm and a duration of 2.5 us. Key issues on dynamic EOS research; the spatial uniformity and temporal steadiness of shock wave were estimated, and the preheating problem was also investigated by measurements of the self-emission and reflectivity from target rear surface. The experimental and analytical methods were validated by using double-step targets consisting of two Hugoniot standard metals. Extreme pressures only accessed in nuclear explosion experiments were generated with reproducibility and good accuracy using the laser direct-drive experimental system, for Al, Cu, polystyrene, and Ta. It was indicated that new and reliable EOS data at the ultrahigh pressures could be provided for materials ranging from low to high initial density by the laser direct-drive experimental technique. (C) 2004 American Institute of Physics.
Present status and future prospects of laser fusion research at ILE Osaka university 査読

K Mima, KA Tanaka, R Kodama, T Johzaki, H Nagatomo, H Shiraga, Y Sentoku, N Miyanaga, H Azechi, M Nakai, T Norimatu, K Nagai, J Sunahara, K Nishihara, T Taguchi, H Sakagami

PLASMA SCIENCE & TECHNOLOGY 6 ( 1 ) 2179 - 2184 2004年2月

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Reviewed are the present status and future prospects of the laser fusion research at the ILE Osaka. The Gekko XII and Peta Watt laser system have been operated for investigating the implosion hydrodynamics, fast ignition, and the relativistic laser plasma interactions and so on. In particular, the fast ignition experiments with cone shell target have been in progress as the UK and US-Japan collaboration programs. In the experiments, the imploded high density plasmas are heated by irradiating 500 J level peta-watt laser pulse. The thermal neutron yield is found to increase by three orders of magnitude by injecting the peta-watt laser into the cone shell target. The Rayleigh-Taylor instability experiment results are also reviewed is this paper.
Characterization of extreme UV radiation in laser produced plasma for use in lithography 査読

Nishimura H, Shigemori K, Nakai M, Fujioka S, Shimada Y, Hashimoto K, Yamaura M, Uchida S, Matsui R, Hibino T, Okuno T, Tao Y, Nagai K, Norimatsu T, Nagatomo H, Zhakhovckii V, Furukawa H, Sunahara A, Kawamura T, Murakami M, Nishihra K, Miyanaga N, Nakatsuka M, Izawa Y

Inertial Fusion Sciences and Applications 2003 1077 - 1080 2004年
Characterization of GEKKO/HIPER-driven shock waves for equation-of-state measurements in ultra-high pressure regime

Takamatsu Kikuo, Yamanaka Tatsuhiko, Azechi Hiroshi, Miyanaga Noriaki, Nakai Mitsuo, Ono Takatoshi, Nagai Keiji, Shigemori Keisuke, Ozaki Norimasa, Tanaka Kazuo A.

Journal of Plasma and Fusion Research vol. 80, pp. 486-491 ( 6 ) 486 - 491 2004年
Estimation of emission efficiency for laser-produced EUV-plasmas 査読

T Kawamura, A Sunahara, K Gamada, K Fujima, F Koike, H Furukawa, T Nishikawa, A Sasaki, T Kagawa, R More, T Kato, M Murakami, Zhakhovskii, V, H Tanuma, T Fujimoto, Y Shimada, M Yamaura, K Hashimoto, S Uchida, C Yamanaka, T Okuno, T Hibino, N Ueda, R Matsui, YZ Tao, M Nakai, K Shigemori, S Fujioka, K Nagai, T Norimatsu, H Nishimura, K Nishihara, N Miyanaga, Y Izawa

EMERGING LITHOGRAPHIC TECHNOLOGIES VIII 5374 918 - 925 2004年

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Extreme Ultra Violet (EUV) light source produced by laser irradiation emits not only the desired EUV light of 13 similar to 14 nm (about 90 eV) but also shorter x-rays. For example, emissions around. 4 similar to 8 nm (about 150 similar to 300 eV) and 1 similar to 2.5 nm (about 0.5 similar to 1.2 keV) are experimentally observed from Sn and/or SnO2 plasmas. These emissions are correspond to the N-shell and M-shell transitions, respectively. From the view point of energy balance and efficiency, these transitions should be suppressed. However, they may, to some extent, contribute to provide the 5p and 4f levels with electrons which eventually emit the EUV light and enhance the intensity. To know well about radiative properties and kinematic of the whole plasma, atomic population kinetics and spectral synthesis codes have been developed. These codes can estimate the atomic population with nl-scheme and spectral shapes of the EUV light. Radiation hydrodynamic simulation have been proceeding in this analysis. Finally, the laser intensity dependence of the conversion efficiency calculated by these codes agrees with that of the corresponding experimental results.
Experimental study on basic properties of laser-produced EUV plasmas on GEKKO-XII laser facility 査読

K Shigemori, M Nakai, Y Shimada, M Yamaura, K Hashimoto, S Fujioka, H Nishimura, S Uchida, A Sunahara, K Nishihara, N Miyanaga, Y Izawa

EMERGING LITHOGRAPHIC TECHNOLOGIES VIII 5374 971 - 978 2004年

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Extremely ultraviolet (EUV) light at around 13.5 nm of wavelength is the most probable candidate of the light source for lithography for semiconductors of next generation. We have been studying about the EUV light source from laser-produced plasma. Detailed understanding of the EUV plasma is required for developments of modeling with simulation codes. Several parameters should be experimentally measured to develop the important issues in the simulation codes. We focused on density profile, properties of EUV emission, and opacity of the laser-produced plasmas. We present recent experimental results on these basic properties of the laser-produced EUV plasmas.
Experimental study on ablative stabilization of Rayleigh-Taylor instability of laser-irradiated targets 査読

K Shigemori, T Sakaiya, K Otani, S Fujioka, M Nakai, H Azechi, H Shiraga, Y Tamari, K Okuno, A Sunahara, H Nagatomo, M Murakami, K Nishihara, Y Izawa

HIGH-POWER LASER ABLATION V, PTS 1 AND 2 5448 634 - 641 2004年

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Hydrodynamic instabilities are key issues of the physics of inertial confinement fusion (ICF) targets. Among the instabilities, Rayleigh-Taylor (RT) instability is the most important because it gives the largest growth factor in the ICF targets. Perturbations on the laser irradiated surface grow exponentially, but the growth rate is reduced by ablation flow. The growth rate gamma is written as Takabe-Betti formula: gamma = (kg/(1+kL))(1/2). -betakm/rho(a), where k is wave number of the perturbation, g is acceleration, L is density scale-length, beta is a coefficient, m is mass ablation rate per unit surface, and rho(a), is density at the ablation front. We experimentally measured all the parameters in the formula for polystyrene (CH) targets. Experiments were done on the RIPER laser facility at Institute of Laser Engineering, Osaka University. We found that the beta value in the formula is similar to 1.7, which is in good agreements with the theoretical prediction, whereas the beta for certain perturbation wavelengths are larger than the prediction. This disagreement between the experiment and the theory is mainly due to the deformation of the cutoff surface, which is created by non-uniform ablation flow from the ablation surface. We also found that high-Z doped plastic targets have multiablation structure, which can reduce the RT growth rate. When a low-Z target with high-Z dopant is irradiated by laser, radiation due to the high-Z dopant creates secondary ablation front deep inside the target. Since, the secondary ablation front is ablated by x-rays, the mass ablation rate is larger than the laser-irradiated ablation surface, that is, further reduction of the RT growth is expected. We measured the RT growth rate of Br-doped polystyrene targets. The experimental results indicate that of the CHBr targets show significantly small growth rate, which is very good news for the design of the ICF targets.
Rayleigh-taylor instability and its reduction in laser-accelerated targets 査読

Shiraga H, Shigemori K, Nakai M, Sakaiya T, Fujioka S, Tamari Y, Azechi H, Nishihara K, Sunahara A, Nagatomo H, Ikegawa T, Ohnishi N, Nagai K, Norimats T, Yamanaka T

Inertial Fusion Sciences and Applications 2003 115 - 120 2004年
Reduction of the Rayleigh-Taylor instability growth with multi-color laser irradiation 査読

Shigemori K, Otani K, Sakaiya T, Sunahara A, Fujioka S, Nakai M, Shiraga H, Azechi H, Nishihara K

Inertial Fusion Sciences and Applications 2003 186 - 189 2004年
Theoretical modeling of laser-produced plasmas for development of extreme UV radiation source for lithography 査読

Nishihara K, Nishikawa T, Sasaki A, Kawamura T, Sunahara A, Furukawa H, Murakami M, Nishimura H, Shimada Y, Nakai M, Fujioka S, Shigemori K, Uchida S, Fujima K, More R, Koike F, Kagawa T, Zhakhovskii V, Hashimoto K, Yamaura M, Matsui R, Hibino T, Okuno T, Tao Y, Sohnatzadeh F.L, Nagai K, Norimatsu T, Tanuma H, Miyanaga N, Izawa Y

Inertial Fusion Sciences and Applications 2003 1069 - 1073 2004年
First observation of density profile in directly laser-driven polystyrene targets for ablative Rayleigh-Taylor instability research 査読

S Fujioka, H Shiraga, M Nishikino, K Shigemori, A Sunahara, M Nakai, H Azechi, K Nishihara, T Yamanaka

PHYSICS OF PLASMAS 10 ( 12 ) 4784 - 4789 2003年12月

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The temporal evolution of the density profile of a directly laser-driven polystyrene target was observed for the first time using an x-ray penumbral imaging technique coupled with side-on x-ray backlighting at the GEKKO XII [C. Yamanaka , IEEE J. Quantum Electron. QE-17, 1639 (1981)]-High Intensity Plasma Experimental Research laser facility (I-L=0.7x10(14) W/cm(2), lambda(L)=0.35 mum). This density measurement makes it possible to experimentally confirm all physical parameters [gamma(k),k,g,m,rho(a),L-m] appearing in the modified Takabe formula for the growth rate of the ablative Rayleigh-Taylor instability. The measured density profiles were well reproduced by a one-dimensional hydrodynamic simulation code. The density measurement contributes toward fully understanding the ablative Rayleigh-Taylor instability. (C) 2003 American Institute of Physics.
Equation-of-state measurements of polyimide at pressures up to 5.8 TPa using low-density foam with laser-driven shock waves 査読

K Takamatsu, N Ozaki, KA Tanaka, T Ono, K Nagai, M Nakai, T Watari, A Sunahara, M Nakano, T Kataoka, H Takenaka, M Yoshida, K Kondo, T Yamanaka

PHYSICAL REVIEW E 67 ( 5 ) 2003年5月

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The laser-driven equation-of-state (EOS) experiments for polyimide are presented. The experiments were performed with emission measurements from the rear sides of shocked targets at up to a laser intensity of 10(14) W/cm(2) or higher with 351 nm wavelength and 2.5 ns duration. Polyimide Hugoniot data were obtained up to 0.6 TPa with good accuracy. Applying low-density foam ablator to the EOS unknown material, we also obtained the data at a highest pressure of 5.8 TPa in the nonmetal materials. Those data were in agreement with the theoretical curves.
Side-on measurement of hydrodynamics of laser-driven plasmas with high space- and time-resolution x-ray imaging technique 査読

S Fujioka, H Shiraga, M Nishikino, Y Tamari, K Shigemori, M Nakai, H Azechi

REVIEW OF SCIENTIFIC INSTRUMENTS 74 ( 3 ) 2198 - 2201 2003年3月

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We developed and improved high space- and time-resolution x-ray imaging techniques (3-6 mum, 100-200 ps). These techniques were coupled with side-on x-ray backlighting for observing hydrodynamics of directly laser-driven polystyrene plasmas. As a high sensitive x-ray image detector, Imaging Plate was introduced to penumbral imaging technique [S. Fujioka et al, Rev. Sci. Instrum. 73, 2588 (2002)]. Noise in penumbral images was reduced by this improvement, and high quality density profiles of plasmas were obtained. A large-magnification slit camera, whose-slit width and magnification were 4 mum and 82.8, was coupled with an x-ray streak camera (XSC). Due to the advantage of the large-magnification, high spatial resolution of 5.8 mum was found even with an XSC, the photocathode of which usually has low spatial resolution. These techniques are useful in understanding of hydrodynamic instability in inertial confinement fusion. (C) 2003 American Institute of Physics.
Temporal evolution of temperature and density profiles of a laser compressed core (invited) 査読

Y Ochi, Golovkin, I, R Mancini, Uschmann, I, A Sunahara, H Nishimura, K Fujita, S Louis, M Nakai, H Shiraga, N Miyanaga, H Azechi, R Butzbach, E Forster, J Delettrez, J Koch, RW Lee, L Klein

REVIEW OF SCIENTIFIC INSTRUMENTS 74 ( 3 ) 1683 - 1687 2003年3月

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Temporal evolutions of the electron temperature and density profiles in the inertial confinement fusion core plasma were obtained through a combination of experimental technology to create a uniform core, diagnostics developments,,and a data analysis technique to obtain an optimal solution. In the experiment, time- and space-resolved x-ray spectroscopic measurements were carried out; an x-ray streak spectrograph and a monochromatic x-ray framing camera provided temporal evolution of x-ray spectrum and monochromatic emissivities, respectively. The spectrum and emissivity profile were iteratively fitted as a function of electron temperature, density, and space. Then, optimal solutions were successfully extracted with the help of Niched-Pareto genetic algorithm. Temporal behavior between those data is well corrected by comparing spatially and spectrally integrated intensities. The resultant profiles were compared with hydrocode simulations, showing that spatially averaged electron temperature and density evolutions are well replicated by the simulations, but their detail spatial profiles do not agree with them. (C) 2003 American Institute of Physics.
X-ray imaging diagnostics for laser-driven hydrodynamic instability experiments 査読

H Shiraga, H Azechi, M Nakai, K Shigemori, M Nishikino, T Sakaiya, S Fujioka, Y Tamari, T Yamanaka

REVIEW OF SCIENTIFIC INSTRUMENTS 74 ( 3 ) 2194 - 2197 2003年3月

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Rayleigh-Taylor (RT) instability is one of the most important physical issues in the inertial confinement fusion research. The reduction of its growth rate due to laser-driven ablation, which is described by the modified Takabe formula, is of great importance for-a precise understanding of the target physics. We have developed various diagnostic techniques for the measurement of the parameters appearing in the Takabe formula, such as the growth rate, the acceleration, the mass ablation rate, and the density structure including ablation density and density scalelength. Face-on and side-on x-ray backlighting were coupled with moire interferometry imaging, penumbral imaging, and Fresnel zoneplate imaging. All the physical parameters related to RT instability were measured experimentally, and compared with simulation results. (C) 2003 American Institute Of Physics.
Equation-of-state measurements of polyimide at pressures up to 5.8 TPa using low-density foam with laser-driven shock waves 査読

K. Takamatsu, N. Ozaki, K. A. Tanaka, T. Ono, K. Nagai, M. Nakai, T. Watari, A. Sunahara, M. Nakano, T. Kataoka, H. Takenaka, M. Yoshida, K. Kondo, T. Yamanaka

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 67 ( 5 ) 5 2003年

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The laser-driven equation-of-state (EOS) experiments for polyimide are presented. The experiments were performed with emission measurements from the rear sides of shocked targets at up to a laser intensity of [Formula presented] or higher with 351 nm wavelength and 2.5 ns duration. Polyimide Hugoniot data were obtained up to 0.6 TPa with good accuracy. Applying low-density foam ablator to the EOS unknown material, we also obtained the data at a highest pressure of 5.8 TPa in the nonmetal materials. Those data were in agreement with the theoretical curves. © 2003 The American Physical Society.
High-speed x-ray radiographic measurement of laser-driven hydrodynamic instability 査読

H Shiraga, H Azechi, M Nakai, K Shigemori, M Nishikino, T Sakaiya, S Fujioka, Y Tamari, T Yamanaka

25TH INTERNATIONAL CONGRESS ON HIGH-SPEED PHOTOGRAPHY AND PHOTONICS 4948 425 - 430 2003年

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Hydrodynamic instability in laser-irradiated targets have been investigated in detail by using ultra high-speed x-ray radiographic technique. Recently developed high-resolution x-ray imaging for laser-driven Rayleigh-Taylor (RT) instability experiments as well as data including RT growth rate, ablation density and plasma density profile are described. Results are of great importance for comprehensive understanding of the dispersion relation of the laser-driven RT instability. Especially, direct observation of the ablation density was first achieved with temporal and spatial resolutions of 100 ps and 3 mum, respectively. Imaging technique includes x-ray Moire imaging, x-ray penumbral imaging and Fresnel phase zone plate imaging coupled with x-ray streak cameras or x-ray CCD cameras. Experiments were performed by using Gekko-XII/HIPER laser system at the Institute of Laser Engineering, Osaka University.
Hydrodynamic instability experiments on the HIPER laser 査読

K Shigemori, H Azechi, S Fujioka, Y Kanai, N Miyanaga, A Murakami, T Muranaka, H Nagatomo, M Nakai, M Nishikino, K Nishihara, H Nishimura, T Sakaiya, H Shiraga, A Sunahara, H Takabe, T Takayama, Y Tamari, A Tanaka, T Yamanaka

PLASMA PHYSICS 669 269 - 272 2003年

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We present recent results on the hydrodynamic instability experiments on the HIPER (High Intensity Plasma Experimental Research) laser facility at Institute of Laser Engineering, Osaka University. We measured the Rayleigh-Taylor growth rate on the HIPER laser. Also measured were all parameters that determine the RT growth rate. We focused on the measurements of the ablation density of laser-irradiated targets, which had not been experimentally measured. The experimental results were compared with calculations with one dimensional simulation coupled with and without Fokker-Planck equation for electron heat transport.
Progress in understanding of laser-produced plasmas for EUV source 査読

N Miyanaga, K Fujima, S Fujioka, Y Fujimoto, H Fujita, H Furukawa, K Hashimoto, T Hibino, T Kagawa, T Kato, T Kawamura, F Koike, R Matsui, R More, M Murakami, K Nagai, M Nakai, M Nakatsuka, T Nishikawa, K Nishihara, H Nishimura, T Norimatsu, T Okuno, A Sasaki, K Shigemori, Y Shimada, FL Sohnatzadeh, A Sunahara, H Tanuma, Y Tao, K Tsubakimoto, S Uchida, M Yamaura, H Yoshida, Zhakhovskii, V, Y Izawa

2003 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2 297 - 298 2003年
Study on EUV emission properties of laser-produced plasma at ILE, Osaka 査読

M Nakai, H Nishimura, K Shigemori, N Miyanaga, T Norimatsu, K Nagai, R Matsui, T Hibino, T Okuno, FS Sohbatzadeh, Y Tao, K Hashimoto, M Yamaura, S Fujioka, H Nagatomo, Zhakhovckii, V, K Nishihra, S Uchida, Y Shimada, H Furukawa, M Nakatsuka, Y Izawa

LASER-GENERATED AND OTHER LABORATORY X-RAY AND EUV SOURCES, OPTICS, AND APPLICATIONS 5196 289 - 297 2003年

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A new research project on extreme ultraviolet (EUV) source development has just been started at the Institute of Laser Engineering, Osaka University. The main task of this project is to find a scientific basis for generating efficient, high-quality, high power EUV plasma source for semiconductor industry. A set of experimental data is to be provided to develop a detailed atomic model included in computer code through experiments using GEKKO-XII high power laser and smaller but high-repetitive lasers. Optimum conditions for efficient EUV generation will be investigated by changing properties of lasers and targets. As the,first step of the experiments, spherical solid tin and tin-oxide. targets were illuminated uniformly with twelve beams from the GEKKO XII. It has been confirmed that maximum conversion efficiency into 13.5 nm EUV light is achieved at illumination intensity less than 2 x 10(11) W/cm(2). No significant difference is found between laser wavelengths of one pm and a half mum. Density structure of the laser-irradiated surface of a planar tin target has been measured experimentally at 10(12) W/cm(2) to show formation of double ablation structure with density plateau by thermal radiation transport. An opacity experiment has just been initiated.
Nuclear fusion - Fast heating scalable to laser fusion ignition 査読

R Kodama, H Shiraga, K Shigemori, Y Toyama, S Fujioka, H Azechi, H Fujita, H Habara, T Hall, Y Izawa, T Jitsuno, Y Kitagawa, KM Krushelnick, KL Lancaster, K Mima, K Nagai, M Nakai, H Nishimura, T Norimatsu, PA Norreys, S Sakabe, KA Tanaka, A Youssef, M Zepf

NATURE 418 ( 6901 ) 933 - 934 2002年8月
Penumbral imaging for measurement of the ablation density in laser-driven targets 査読

S Fujioka, H Shiraga, M Nishikino, M Heya, K Shigemori, M Nakai, H Azechi, S Nakai, T Yamanaka

REVIEW OF SCIENTIFIC INSTRUMENTS 73 ( 7 ) 2588 - 2596 2002年7月

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One-dimensional (1D) penumbral imaging technique with high spatial resolution has been developed, and applied to density profile measurements in laser-driven Rayleigh-Taylor instability experiments at a GEKKO XII-HIPER laser system. A laser-irradiated planar target was observed with side-on x-ray backlighting. A penumbral image of an x-ray radiograph was made by using a knife-edge imager. The x-ray radiograph was, then, reconstructed by differentiating the penumbral image with a proper Wiener filtering. A density profile was deduced from the reconstructed x-ray radiograph. In a proof-of-principle experiment, the density profile of a polystyrene (PS) target before laser irradiation was measured by using this method, and high spatial resolution of 3-4 mum was demonstrated. A laser-irradiated PS target in the acceleration phase was observed. The experimentally observed density profile was found to be consistent with the prediction by a 1D hydrodynamic simulation code. The x-ray penumbral imaging is a very simple and useful technique with high spatial resolution for research in hydrodynamics relevant to inertial fusion energy. (C) 2002 American Institute of Physics.
Single spatial mode experiments on initial laser imprint on direct-driven planar targets 査読

M Nakai, H Azechi, N Miyanaga, K Shigemori, T Kawasaki, T Nagaya, M Nishikino, Y Kanai, D Ohnuki, H Nishimura, H Shiraga, O Maegawa, R Ishizaki, K Nishihara, H Takabe, T Yamanaka

PHYSICS OF PLASMAS 9 ( 5 ) 1734 - 1744 2002年5月

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Flat plastic targets were directly irradiated and accelerated by partially coherent light from the GEKKO XII laser [Yamanaka , IEEE J. Quantum Electron. QE-17, 1639 (1981)] with the wavelength of 0.53 mum in order to investigate initial laser imprinting. The growth of the perturbation imprinted on the target by an initial foot pulse modulated with a single spatial frequency was observed by the face-on x-ray backlight technique. Imprint levels produced by the foot beam with a stationary intensity modulation of the illumination profile and with a dynamically changing modulation were successfully obtained by an image relay technique and the improved two-wavelength Young's interference method. Simple analytic models are proposed and compared with the experimental results. Stationary imprinting with perturbation wavelength longer than the target thickness is found to be well described by a simple incompressible model. The dynamic dependence of the imprint on the time scale of the temporal illumination profile is found to be qualitatively explained by linear perturbation analysis. (C) 2002 American Institute of Physics.
Imprint reduction in a plasma layer preformed with x-ray irradiation 査読

M Nishikino, H Shiraga, N Miyanaga, N Ohnishi, K Shigemori, S Fujioka, M Nakai, H Nishimura, H Azechi, K Mima, H Takabe, S Nakai, T Yamanaka

PHYSICS OF PLASMAS 9 ( 4 ) 1381 - 1391 2002年4月

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Indirect-direct-hybrid irradiation scheme has been proposed for suppressing the initial imprint of the laser irradiation nonuniformities. The target is irradiated by a low intensity x-ray radiation prior to the direct-drive laser pulse. The x-ray irradiation generates a plasma expansion layer on the target surface. The thermal smoothing effect is expected to take place in the preformed plasma when the direct-drive laser pulse comes onto the target, and then, the initial imprint can be significantly reduced. Planar target experiments on the indirect-direct-hybrid irradiation scheme were performed. The preformed plasma profile was measured by using x-ray side-on backlighting method. The reduction of the initial imprint was demonstrated by the indirect-direct-hybrid irradiation scheme on planar target experiments. The imprint is suppressed by a factor of 1.5-7 depending on x-ray preirradiation conditions. Results are in good agreement with the cloudy-day model with parameters derived from one-dimensional simulation. (C) 2002 American Institute of Physics.
Perturbation transfer from the front to rear surface of laser-irradiated targets 査読

K Shigemori, H Azechi, M Nakai, T Endo, T Nagaya, T Yamanaka

PHYSICAL REVIEW E 65 ( 4 ) 2002年4月

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We present experimental results on the perturbation transfer of laser irradiated planar foils. Perturbed polystyrene foils were irradiated directly by laser at intensity of 6x10(13) W/cm(2). We measured perturbations on the foils by side-on x-ray backlighting technique. Perturbations on the rear surface due to the rippled shock front were observed just after the shock breakout. We also observed feedthrough of perturbations on the laser-irradiated surface that grows due to the Rayleigh-Taylor instability.
Ablative Rayleigh-Taylor instability at short wavelengths observed with moire interferometry 査読

T Sakaiya, H Azechi, M Matsuoka, N Izumi, M Nakai, K Shigemori, H Shiraga, A Sunahara, H Takabe, T Yamanaka

PHYSICAL REVIEW LETTERS 88 ( 14 ) 2002年4月

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One of the most important quantities to be measured for better understanding of the ablative Rayleigh-Taylor (RT) instability is the growth rate in the short wavelength region at which the RT instability is significantly reduced. The short wavelength (4.7-12 mum) RT growth rates for direct-drive targets were measured for the first time by utilizing the innovated moire interferometry [M. Matsuoka et al., Rev. Sci. Instrum. 70, 637 (1999)]. These growth rates were reasonably well reproduced by the simulation that solves the Fokker-Planck equation for nonlocal heat transport.
Perturbation transfer from the front to rear surface of laser-irradiated targets 査読

K. Shigemori, H. Azechi, M. Nakai, T. Endo, T. Nagaya, T. Yamanaka

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 65 ( 4 ) 045401/4 2002年4月

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We present experimental results on the perturbation transfer of laser irradiated planar foils. Perturbed polystyrene foils were irradiated directly by laser at intensity of 6 × 1013 W/cm2. We measured perturbations on the foils by side-on x-ray backlighting technique. Perturbations on the rear surface due to the rippled shock front were observed just after the shock breakout. We also observed feedthrough of perturbations on the laser-irradiated surface that grows due to the Rayleigh-Taylor instability. © 2002 The American Physical Society.
Perturbation transfer from the front to rear surface of laser-irradiated targets 査読

K. Shigemori, H. Azechi, M. Nakai, T. Endo, T. Nagaya, T. Yamanaka

Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 65 ( 4 ) 4 2002年

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We present experimental results on the perturbation transfer of laser irradiated planar foils. Perturbed polystyrene foils were irradiated directly by laser at intensity of [formula presented] We measured perturbations on the foils by side-on x-ray backlighting technique. Perturbations on the rear surface due to the rippled shock front were observed just after the shock breakout. We also observed feedthrough of perturbations on the laser-irradiated surface that grows due to the Rayleigh-Taylor instability. © 2002 The American Physical Society.
Rayleigh Taylor and laser imprinting diagnostics 査読

H Azechi, M Nakai, K Shigemori, N Izumi, H Shiraga, M Nishikino, T Sakaiya, S Fujioka, Y Tamari, N Miyanaga, H Nishimura

ADVANCED DIAGNOSTICS FOR MAGNETIC AND INERTIAL FUSION 169 - 176 2002年
Density profile of the ablating plasma produced by soft x-ray irradiation

M Nishikino, H Shiraga, M Matsuoka, S Fujioka, K Shigemori, M Nakai, H Azechi, N Miyanaga, T Yamanaka, S Nakai

REVIEW OF SCIENTIFIC INSTRUMENTS 72 ( 1 ) 653 - 656 2001年1月

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Indirect/direct-hybrid irradiation has been proposed for suppressing the initial imprint of laser-irradiation nonuniformities. Indirect soft x-ray preirradiation of the target generates a plasma expansion layer on the target surface. When the drive laser beam comes later, the target has a substantial stand-off distance between the ablation front and the beam absorption region, in which the thermal smoothing effect is expected to take place, and then, the initial imprint of the laser irradiation nonuniformities can be significantly reduced. Stand-off distance is of great importance in the imprint mitigation. We measured the preformed plasma profile by using the x-ray side-on backlighting method. The preformed plasma was backlit by x rays and imaged onto an x-ray streak camera. The scale length of the preformed plasma was found to increase with duration of the soft x-ray irradiation. The expansion velocity was found to be 6 x 10(5) cm/s at an x-ray irradiation of 1 x 10(11) W/cm(2). (C) 2001 American Institute of Physics.
Monochromatic x-ray imaging with bent crystals for laser fusion research

K Fujita, H Nishimura, Niki, I, J Funakura, Uschmann, I, R Butzbach, E Forster, M Nakai, M Fukao, A Sunahara, H Takabe, T Yamanaka

REVIEW OF SCIENTIFIC INSTRUMENTS 72 ( 1 ) 744 - 747 2001年1月

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Monochromatic x-ray imaging with toroidally bent crystals has been applied to investigate critical issues in laser fusion research in collaboration with Jena University [for example, I. Uschmann , Rev. Sci. Instrum. 66, 734 (1995)]. Described in this article is the study on x-ray diagnostics to provide simultaneously time, space, and spectral resolutions for the laser fusion experiments by the use of toroidally bent crystals. A monochromatic x-ray imager was developed, which consists of two sets of identical five bent crystals and a fast x-ray framing camera. The attained spatial resolution of 6 mum, time resolution of 34 ps, and spectral resolution of 10 eV are high enough to observe temporal evaluation and temperature distribution of the laser fusion hot core. In addition, a new x-ray imager with bent crystal was developed to investigate hydrodynamic instabilities occurring in laser-driven planer targets as one of the most critical issues in laser fusion research. The imager was so designed as to match the experiments using rather thick, massive targets irradiated under the same condition as in the high-gain experiments. Configuration and specifications of the imager are presented. (C) 2001 American Institute of Physics.
Time-resolved ten-channel monochromatic imaging of inertial confinement fusion plasmas

Ingo Uschmann, Kazuhiza Fujita, Izam Niki, Randolf Butzbach, Hiroaki Nishimura, Jiro Funakura, Mitsuo Nakai, Eckhart Förster, Kunioki Mima

Applied Optics 39 ( 31 ) 5865 - 5865 2000年11月
Feed-out of rear surface perturbation due to rarefaction wave in laser-irradiated targets

K Shigemori, M Nakai, H Azechi, K Nishihara, R Ishizaki, T Nagaya, H Nagatomo, K Mima

PHYSICAL REVIEW LETTERS 84 ( 23 ) 5331 - 5334 2000年6月

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We report experimental results on hydrodynamic perturbation transfer from the rear to the front of laser-irradiated targets. Flat polystyrene foils with rear-surface perturbations were irradiated by partially coherent light. We observed phase inversion of the rear surface after the shock breakout at the rear surface. Perturbations on the laser-irradiated surface arose due to the rippled rarefaction wave. Experimental results were well reproduced by a simple model with unperturbed hydrodynamic quantities calculated From the one-dimensional simulation.
Indirect-direct hybrid target experiments with the GEKKO XII laser 査読

H Nishimura, H Shiraga, H Azechi, N Miyanaga, M Nakai, N Izumi, M Nishikino, M Heya, K Fujita, Y Ochi, K Shigemori, N Ohnishi, M Murakami, K Nishihara, R Ishizaki, H Takabe, K Nagai, T Norimatsu, M Nakatsuka, T Yamanaka, S Nakai, C Yamanaka, K Mima

NUCLEAR FUSION 40 ( 3Y ) 547 - 556 2000年3月

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A new fusion capsule drive scheme was investigated. The capsule is illuminated by a low intensity thermal X ray pulse prior to the main drive pulse. This leads to a noticeable suppression of initial imprinting by the drive beam because of thermal smoothing in the preformed plasma. Of the several types of indirect-direct hybrid target, the authors investigated the hybrid effect for two types. One is a foam hybrid, in which the fuel capsule has a low density foam layer attached directly on its surface and where pulsed radiation generated from a thin high Z layer on the foam propagates through the foam, creating a preformed plasma. The other is an external hybrid, in which the capsule is illuminated by external X ray radiation generated using different beams from the capsule drive beams. The hybrid effect was demonstrated for both types by imposing an initial imprint on a planar target with an intensity modulated beam, and subsequent non-uniformity growth due to Rayleigh-Taylor instability was observed by means of face-on backlighting. The observed suppression due to the presence of the preformed plasma is interpreted by a cloudy day model for both hybrids. Capsule implosion experiments have also been started. The overall implosion dynamics observed is replicated by 1-D hydrocode simulations. Preliminary results from the implosion experiments are presented.
C. レーザーエネルギー応用

山神晋, 中山斌義, Yu W., 佐々木明, 内海隆行, 森林健悟, 河内哲哉, 加道雅孝, 長谷川登, 上島豊, 田島俊樹, 大道博行, 南雲雄三, 林茂樹, 八木隆志, 松村健, 山崎将, 小島勇夫, 本田一匡, 下浦厚志, 望月孝晏, 宮本修治, 長友英夫, 天野壮, 唐華興, 吉住泰明, 畦地博, 中井光男, Joyeux Denis, Phalippou Daniel, Jamelot Gerard, 高橋栄一, 奥田功, 鈴木将之, 松本裕治, 松嶋功, 加藤進, 桑原研爾, 大和田野芳郎, 岩崎優, 実野孝久, 本越伸二, 西紀昭, 中塚正大, 村上陽一, 森浩一, 小紫公也, 荒川義博, 石本雅嗣, 内田成明, 今崎一夫, 周香林, 阪部周二, 河島信樹, 沖原伸一朗, 崔日祐, 佐藤文信, 島田岳洋, 高橋浩司, 坂部祐介, 乗松孝好, 井澤靖和, 飯田敏行, 中島一久, 金沢修平, 神門正城, Fiedorowicz H., 近藤修司, 小瀧秀行, 出羽英紀, 細貝知直, 依田正樹, 馬場洋介, 向井成彦, 佐野雄二, 荻須達樹, 山浦道照, Bartnik A., 猪原哲, 佐藤三郎, 山部長兵衛, 野澤俊一, 島田義則, 緒方淳寿, 山中龍彦, 山中千代衛, 石窪雄二, 川端欣哉, Rakowski R.

レーザー研究 28 ( 0 ) 69 - 71,74 2000年
Hydrodynamic model experiment of the collision of supernova 1987A with its circumstellar ring using high power laser 査読

YG Kang, H Nishimura, H Takabe, H Azechi, T Norimatsu, M Nakai, H Nagatomo, A Sunahara, K Fujita, M Nakatsuka, K Mima, HG Kim, HJ Kong

HIGH-POWER LASERS IN ENERGY ENGINEERING 3886 489 - 495 2000年

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Laboratory simulation of the ejecta-ring collision of Supernova 1987A has been performed by using a high power laser system. Pure hydrodynamic modeling was applied using the invariance of the Euler equations and the experiment was designed with one-dimensional hydrodynamic simulations. Three laser beams of lambda = 0.53 mu m, at the intensity I = 2 x 10(14) W/cm(2) irradiated a CH foil to generate a strong shock wave and subsequent dense plasma flow in a low density CHO foam including a solid sphere at its center. Shock wave propagation and plasma flow with vortex ring - like structures were observed with gated x-ray radiography. Overall hydrodynamic behaviors are consistent with one- and two-dimensional hydrodynamic simulations. The collision dynamics is dominated by a complicated interplay of reflected shock, diffracted shock, transmitted shock waves, and plasma flow behind the main shock passage.
Indirect/direct-hybrid drive implosion experiments with x-ray pre-irradiation 査読

M Nishikino, H Shiraga, N Miyanaga, H Nishimura, K Shigemori, M Heya, H Azechi, M Nakai, K Mima, H Takabe, S Nakai, T Yamanaka

HIGH-POWER LASERS IN ENERGY ENGINEERING 3886 465 - 472 2000年

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Indirect/direct-hybrid drive scheme to suppress the initial imprint of the laser irradiation nonuniformities has been proposed and investigated as a new drive scheme for inertial fusion. In direct drive inertial confinement fusion, initial imprinting of laser irradiation nonunifornity is considered to cause seeding of the perturbation on target surface in the very beginning of the irradiation which may be amplified by Rayleigh-Taylor instability in the acceleration phase of the implosion and be deleterious to efficient heating of the hot spark at the center of the compressed fuel core plasma. In indirect/direct-hybrid drive scheme, the target is first irradiated very uniformly with low-intensity soft x-ray prepulse(indirect drive) from external sources apart from the target. Indirect x-ray pre-irradiation of the surface causes a pre-expansion layer of the plasma before the irradiation of the direct drive laser beam. When the drive beam(direct drive) comes later, the target has a substantial stand-off distance between the ablation front and the beam absorption region. Thus the thermal smoothing effect is expected to occur in this transport layer, and then, the initial imprint can be significantly reduced. We have demonstrated planar target experiments on the indirect/direct hybrid scheme and observed reduction of the initial imprint. Implosion experiments the indirect/direct hybrid drive spherical capsules with external x-ray sources has been started. Overall implosion was performed successfully.
Direct measurement of laser irradiation uniformity of fusion pellets by the use of X-ray frame images 査読

H Honda, H Nishimura, M Nakai, N Miyanaga, K Tsubakimoto, H Shiraga, H Azechi, H Takabe, K Nishihara, S Nakai, K Mima

FUSION ENGINEERING AND DESIGN 44 137 - 140 1999年2月

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Time-resolved 2-dimensional (2D) X-ray images were taken to evaluate laser irradiation non-uniformity of fusion pellets. X-ray distributions corresponding to the drive laser geometry were obtained on the circumference of the image of a gold-coated surrogate target. The experimental results were analyzed to derive the irradiances by using an experimentally-determine d relation between the laser irradiation intensity and the X-ray intensity. The analyzed results were compared with a laser illumination calculation in which temporally varying laser beams were projected onto a target sphere. A reasonable agreement between the measurement and calculation has been obtained. (C) 1999 Elsevier Science S.A. All rights reserved.
Effects of non-local electron thermal transport on ablative Rayleigh-Taylor instability 査読

M Honda, K Mima, K Shigemori, M Nakai, H Azechi, A Nishiguchi

FUSION ENGINEERING AND DESIGN 44 205 - 208 1999年2月

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A two-dimensional full Fokker-Planck (FP) simulation code coupled with an ideal fluid equation has been constructed. This code was applied for the numerical simulation of the Rayleigh-Taylor (RT) instability on the directly driven ablation front. The simulation results show that an accelerated thin foil is preheated by the non-local electron heat transport, the ablation front density is depleted, and the linear growth rate of the RT instability is suppressed strongly. By investigating the mode structure in the simulation, it is found that the peak of the eigen mode shifts toward the corona region by the non-local heat conduction effects. This is the reason why the growth rate is reduced. (C) 1999 Elsevier Science S.A. All rights reserved.
Hydrodynamic perturbation growth in the start-up phase 査読

R Ishizaki, K Nishihara, JG Wouchuk, K Shigemori, M Nakai, H Azechi, K Mima

FUSION ENGINEERING AND DESIGN 44 199 - 203 1999年2月

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A simple analytical model is presented to study hydrodynamic perturbation growth in the start-up phase in laser fusion, namely propagation of a rippled shock driven by non-uniform laser ablation induced by initial target roughness or non-uniform laser irradiation. These perturbation growths are very important because they seed the Rayleigh-Taylor (RF) instability in the subsequent acceleration and stagnation phases. We investigate temporal evolutions of the shock front and the ablation surface. In the result, we have found that the shock front ripples oscillate and decay in both cases of uniform laser irradiation on a target with a rippled surface and non-uniform laser irradiation on a smooth target surface. On the other hand, we obtain that there is the asymptotic value of the ablation surface deformation in the former case and the asymptotic growth rate of the ablation surface ripple in the latter case. Approximate formulas expressing both temporal evolutions of the shock front and the ablation surface are obtained in the weak shock limit. These formulas are also applicable in a relatively strong shock. We also investigate the case of oscillating non-uniform laser irradiation with time. The oscillation frequency dependences of the shock front ripple and the growth rate of the ablation surface ripple are discussed. (C) 1999 Elsevier Science S.A. All rights reserved.
Rippled shock propagation and hydrodynamic perturbation growth in laser implosion 査読

R Ishizaki, K Nishihara, JG Wouchuk, K Shigemori, M Nakai, N Miyanaga, H Azechi, K Mima

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 85 ( 1-3 ) 34 - 38 1999年1月

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A simple analytical model is presented to study hydrodynamic perturbation growth in the start-up phase in laser fusion, namely propagation of a rippled shock driven by nonuniform laser ablation induced by initial target roughness or nonuniform laser irradiation. These perturbation growths are very important, because they seed the Rayleigh-Taylor instability in the subsequent acceleration and stagnation phases. We investigate temporal evolutions of the shock front and the ablation surface. As a result, we have found that the shock front ripples oscillate and decay in both the case of uniform laser irradiation on a target with a rippled surface and that of nonuniform laser irradiation on a smooth target. It was also found that there is an asymptotic value of the ablation surface deformation in the former case and an asymptotic growth rate of the ablation surface ripple in the latter case. Approximate formulae expressing both temporal evolutions of the shock front and the ablation surface are obtained in the weak shock limit. These formulae are also applicable in a relatively strong shock. We also investigate the case of oscillating nonuniform laser irradiation with time. The oscillation frequency dependences of the shock front ripple and the growth rate of the ablation surface ripple are discussed. (C) 1999 Elsevier Science S.A. All rights reserved.
Progress of direct drive laser fusion research at ILE, Osaka 査読

K Mima, H Azechi, H Fujita, N Izumi, T Jitsuno, Y Kato, T Kanabe, Y Kitagawa, R Kodama, N Miyanaga, M Nakai, M Nakatsuka, S Nakai, H Nagatomo, T Norimatsu, K Nishihara, H Nishimura, H Shiraga, H Takabe, T Yamanaka

THIRD INTERNATIONAL CONFERENCE ON SOLID STATE LASERS FOR APPLICATION TO INERTIAL CONFINEMENT FUSION, PTS 1 AND 2 3492 34 - 41 1999年

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Reviewed are the progress in direct drive implosion researches with Gekko XII laser system. Precise observation of the growth rate of Rayleigh-Taylor instability and the suppression of imprints using indirect-direct hybrid implosion have been investigated. Theoretical and experimental researches on the fast ignition scheme are also studied. Relativistic laser plasma interaction experiments with Peta-Watt Module and Gekko XII are also described. Finally, the future direction of the research including the development of solid state laser for fusion reactor is discussed.
Measurements of mass ablation rate of laser-irradiated target by the face-on x-ray backlighting technique

K Shigemori, H Azechi, M Nakai, K Mima

REVIEW OF SCIENTIFIC INSTRUMENTS 69 ( 11 ) 3942 - 3944 1998年11月

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We report a novel method to measure the value of mass ablation rate per unit surface (m(over dot))in laser-irradiated targets. The face-on x-ray backlighting technique was utilized for the measurement. Flat polystyrene foils were irradiated by the partially coherent light at the intensity of 0.7 or 1.4 x 10(14) W/cm(2). We observed the residual areal mass of the planar targets to deduce temporally resolved mass ablation rate. Observed mass ablation rates are well reproduced both by the steady-state ablation model and by one-dimensional simulation. (C) 1998 American Institute of Physics. [S0034-6748(98)02111-X].
Comment on "Measurements of Rayleigh-Taylor growth rate of planar targets irradiated directly by partially coherent light" - Reply 査読

K Shigemori, H Azechi, M Nakai, H Takabe, K Mima

PHYSICAL REVIEW LETTERS 80 ( 15 ) 3415 - 3415 1998年4月
Recent progress on diagnostic developments for ICF research at IEE Osaka 査読

H Nishimura, H Azechi, M Nakai, N Miyanaga, H Shiraga, R Kodama, N Izumi, M Heya, H Honda, K Fujita, Y Ochi, H Takabe, T Yamanaka, Y Kato, K Mima

PLASMA PHYSICS REPORTS 24 ( 2 ) 114 - 122 1998年2月

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A variety of novel diagnostic instruments and methods have been developed for use in laser fusion research at the Institute of Laser Engineering (ILE), Osaka University. Our efforts are particularly concentrated on development of a diagnostic method capable of high spatial, temporal, and energy resolutions, which, at the same time, makes it possible to observe precisely implosion stability and hot spark formation at the center of compressed plasma. Present status of the X-ray and particle diagnostics development is overviewed.
Rippled Shock Propagation and Hydrodynamic Perturbation Growth in Laser Implosion

R. Ishizaki, K. Nishihara, J. G. Wouchuk, K. Shigemori, M. Nakai, N. Miyanaga, H. Azechi, K. Mima

Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu 7 930 - 932 1998年

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A simple analytical model is presented to study hydrodynamic perturbation growths induced by nonuniform laser ablation in the start-up phase in laser fusion. Namely, propagation of a rippled shock and deformation of an ablation surface caused by nonuniform laser ablation are studied for cases of initial target roughness and nonuniform laser irradiation. The perturbation growth is very important because it seeds the Rayleigh-Taylor instability in the subsequent acceleration and stagnation phases. In result, it can be shown that high intensity of laser irradiation promotes the ablation surface to distort and short wavelength of laser inhibits its deformation. Those behaviors are also investigated in the case that nonuniformity of laser irradiation oscillates with time. © 1998, The Japan Society of High Pressure Science and Technology. All rights reserved.
Direct-drive hydrodynamic instability experiments on the GEKKO XII laser 査読

H Azechi, M Nakai, K Shigemori, N Miyanaga, H Shiraga, H Nishimura, M Honda, R Ishizaki, JG Wouchuk, H Takabe, K Nishihara, K Mima, A Nishiguchi, T Endo

PHYSICS OF PLASMAS 4 ( 11 ) 4079 - 4089 1997年11月

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Hydrodynamic instabilities, such as the Rayleigh-Taylor (R-T) instability, play a critical role in inertial confinement fusion as they finally cause fuel-pusher mixing that potentially quenches thermonuclear ignition. Good understanding of the instabilities is necessary to limit the mixing within a tolerable level. A series of experiments has been conducted on the GEKKO XII laser facility [C. Yamanaka et al., IEEE J. Quantum Electron. QE-17, 1639 (1981)] to measure hydrodynamic instabilities in planar foils directly irradiated by 0.53 mu m laser light. It has been found that (1) the imprint is reasonably explained by an imprint model based on the equation of motion with the pressure perturbation smoothed by the cloudy-day effect, and (2) the experimental R-T growth rate is significantly reduced from the classical growth rate due probably to ablative stabilization enhanced by nonlocal heat transport. (C) 1997 American Institute of Physics. [S1070-664X(97)0-2811-5].
Three-dimensional imaging of laser-imploded targets using X-ray computed tomography technique 査読

YW Chen, N Miyanaga, M Yamanaka, M Nakai, T Yamanaka, S Nakai

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 44 ( 3 ) 890 - 893 1997年6月

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An x-ray emission computed tomography technique has been demonstrated to diagnose the laser implosion uniformity of spherical targets. Three-dimensional images of compressed core were reconstructed from five pinhole camera images obtained at different viewing directions by using an iterative algorithm. The uniformity of the heated plasma is estimated from the intensity distribution of the x-ray emitted from the surface of the target.
Irradiation uniformity measurement of laser fusion pellets by an X-ray imaging method 査読

H Honda, H Nishimura, S Miyamoto, M Nakai, K Kondo, N Miyanaga, K Tsubakimoto, H Azechi, S Nakai, K Mima

FUSION ENGINEERING AND DESIGN 34-35 197 - 200 1997年3月

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Time integrated X-ray emission images at an energy range of 1.8-3.6 keV were obtained to evaluate laser irradiation nonuniformity on fusion pellets. The experimental results were analyzed with a simple illumination calculation. A positive correlation was found between the nonuniformity obtained from the measured X-ray emission intensity and that from the calculated laser irradiation intensity, although the absolute values of the nonuniformities are discrepant. (C) 1997 Elsevier Science S.A.
Measurements of Rayleigh-Taylor growth rate of planar targets irradiated directly by partially coherent light

K Shigemori, H Azechi, M Nakai, M Honda, K Meguro, N Miyanaga, H Takabe, K Mima

PHYSICAL REVIEW LETTERS 78 ( 2 ) 250 - 253 1997年1月

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We report the first measurements of laser-driven Rayleigh-Taylor instability at the linear growth regime in an imprint-free condition. Initially rippled polystyrene foils were irradiated by the partially coherent light. We measured temporal evolution of areal-density perturbation by the face-on x-ray backlighting technique. The observed maximum growth factor was nearly 50. We also measured the acceleration of the irradiated foil. The growth rate was approximately 50% of the classical growth rate. These experimental results were well reproduced by a two-dimensional simulation coupled with the Fokker-Planck treatment of electron heat transport.
Study of laser-imploded core plasmas with an advanced Kirkpatrick-Baez x-ray microscope

R Kodama, H Shiraga, M Miyanaga, T Matsushita, M Nakai, H Azechi, K Mima, Y Kato

REVIEW OF SCIENTIFIC INSTRUMENTS 68 ( 1 ) 824 - 827 1997年1月

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We developed an advanced Kirkpatrick-Baez (AKB) x-ray microscope which consisted of two hyperbolic mirrors and two elliptic mirrors. The spatial resolution of less than or similar to 3 mu m was realized over similar to 1 mm diam. This AKB microscope was used for x-ray imaging in laser fusion experiments. Laser absorption nonuniformity with a large wave number on a spherical solid target or a plane slab target was estimated by measurements of x-ray emission from the target surface with the microscope. The x-ray images of the imploded core plasmas were also obtained with the AKB microscope, changing the laser focus condition and the laser energy balance. (C) 1997 American Institute of Physics.
Experimental study on laser irradiation nonuniformity caused by beam power imbalance 査読

H Honda, H Nishimura, S Miyamoto, M Nakai, K Kondo, N Miyanaga, K Tsubakimoto, H Shiraga, H Azechi, K Nishihara, K Mima

ICPP 96 CONTRIBUTED PAPERS - PROCEEDINGS OF THE 1996 INTERNATIONAL CONFERENCE ON PLASMA PHYSICS, VOLS 1 AND 2 1782 - 1785 1997年

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Time-resolved 2-dimensional (2D) x-ray images were obtained to evaluate laser irradiation nonuniformity on fusion pellets caused by laser beam power imbalance. Intensity modulation was observed on the circumference of the detected image corresponding to laser beam geometry. The experimental results were analyzed with an illumination calculation in which twelve laser beams are simply projected onto a solid sphere and the emitted x-ray flux is assumed to be proportional to the incident laser flux. At early time of laser irradiation, a good agreement between the measured x-ray emission intensity and the model prediction was obtained whereas small discrepancy was found in later time probably due to the omission of plasma expansion.
High-convergence uniform implosion of fusion pellets with the new GEKKO laser 査読

Nishimura H, Azechi H, Shiraga H, Nakai M, Miyanaga N, Takabe H, Norimastu T, Fujita H, Shigemori K, Heya M, Izumi S, Honda H, Fujita K, Sunahara A, Honda M, Kanabe T, Jitsuno T, Takagi M, Kodama R, Tanaka K.A, Nakatsuka M, Nishihara K, Kato Y, Yamanaka T, Nakai S, Mima K

Plasma Physics and Controlled Fusion 39 ( 5A ) 1997年
Experiments on indirect/direct hybrid drive scheme 査読

H Shiraga, H Azechi, Y Kato, K Mima, N Miyanaga, M Murakami, M Nakai, S Nakai, K Nishihara, H Nishimura, T Norimatsu, K Shigemori, H Takabe, M Takagi, T Yamanaka, T Endo, C Yamanaka

FUSION ENERGY 1996, VOL 3 79 - 84 1997年

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An indirect/direct hybrid irradiation scheme of laser fusion targets to reduce the initial imprint of the laser irradiation non-uniformities has been proposed and examined experimentally. The initial imprint of non-uniformities in laser irradiation (direct drive) was successfully reduced by X ray preirradiation emitted by an external source (indirect drive). The indirect/direct hybrid irradiation scheme has been applied to spherical implosion experiments.
Hydrodynamic instability experiments at GEKKO XII 査読

H Azechi, M Nakai, K Shigemori, A Nishiguchi, N Miyanaga, M Honda, H Shiraga, R Kodama, O Maekawa, R Ishizaki, H Takabe, K Nishihara, Y Kato, T Yamanaka, S Nakai, K Mima, T Endo, C Yamanaka

FUSION ENERGY 1996, VOL 3 223 - 231 1997年

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Hydrodynamic instabilities play an important role in inertial confinement fusion implosions. Target surface perturbations will grow, primarily owing to the Rayleigh-Taylor (R-T) instability and finally resulting in fuel-pusher mixing that degrades the implosion performance. Good understanding of the instabilities is necessary to limit the mixing to a tolerable level. At the GEKKO XII laser facility, an extensive series of direct drive experiments has been conducted on the effect of rippled shock propagation, initial imprinting and its suppression by X ray pre-irradiation, and the R-T instability in the linear regime. As to the drive laser, partially coherent light achieves the state-of-the-art uniformity by which spurious imprints are minimized. For the initial imprinting experiments, a single mode perturbation was introduced on the foot pulse for imprint, followed by a uniform main pulse for R-T amplification. The experimental R-T growth rate was significantly reduced in comparison to the classical growth rare.
Recent progress of laser fusion research with the GEKKO lasers at Ile, Osaka 査読

K Mima, M Nakatsuka, H Azechi, H Fujita, H Honda, M Honda, R Ishizaki, Y Izawa, N Izumi, T Jitsuno, T Kanabe, Y Kato, Y Kitagawa, R Kodama, S Matsuoka, N Miyanaga, M Murakami, M Nakai, S Nakai, K Nishihara, H Nishimura, T Norimatsu, S Sakabe, K Shigemori, H Shiraga, H Takabe, M Takagi, KA Tanaka, M Yamanaka, T Yamanaka, GY Yoon, A Nishiguchi, S Miyamoto, K Tsubakimoto, C Yamanaka

FUSION ENERGY 1996, VOL 3 13 - 30 1997年

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The irradiation symmetry of GEKKO XII has recently been improved. It is crucial for laser implosion to form a hot spark in a highly compressed cold fuel. Uniform laser irradiation was achieved by introducing Partially coherent light with angular spectral dispersion and by improving the power balance among the 12 beams. Implosion experiments with the improved GEKKO XII have been carried out to increase the neutron yield normalized by the 1-D simulation result. The normalized neutron yield is of order unity for a convergence ratio of less than 8. The improved uniformity also makes it possible to obtain experimental data which are necessary for the ignition target design. Namely, the Rayleigh-Taylor instability growth rate, the bandwidth dependence of the initial imprint, the effects of an X ray prepulse in reducing the initial imprint and so on have been investigated. As a new project directed towards ignition and burn, an ultra-intense short pulse laser beam is to be added to the GEKKO XII system. This short pulse laser is capable of delivering 100 J/l ps into the compressed core plasma for investigating the feasibility of the fast ignition concept. In future, it will be upgraded to 1 kJ/1 ps to heat plasmas imploded by GEKKO XII.
Three-dimensional imaging of laser-imploded targets using x-ray computed tomography technique 査読

YW Chen, N Miyanaga, M Yamanaka, M Nakai, T Yamanaka, S Nakai

1996 IEEE NUCLEAR SCIENCE SYMPOSIUM - CONFERENCE RECORD, VOLS 1-3 283 - 286 1997年

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An x-ray emission computed tomography technique has been demonstrated to diagnose the laser implosion uniformity of spherical targets. Three-dimensional images of compressed core were reconstructed from five pinhole camera images obtained at different viewing directions by using an iterative algorithm. The uniformity of the heated plasma is estimated from the intensity distribution of the x-ray emitted from the surface of the target.
Theoretical studies on uniformity and stability in direct drive laser fusion 査読

K Nishihara, H Takabe, M Murakami, R Ishizaki, JG Wouchuk, M Honda, A Sunahara, S Hasegawa, Y Shimuta, Y Ueshima, H Azechi, H Shiraga, H Nishimura, N Miyanaga, M Nakai, K Shigemori, Y Fukuda, K Mima, A Nishiguchi, H Sakagami

FUSION ENERGY 1996, VOL 3 161 - 170 1997年

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Uniformity and stability issues are investigated for three phases of a laser implosion process: startup, acceleration and stagnation. Hydrodynamic perturbation growth in the startup phase seeds the Rayleigh-Taylor (RT) instability in the subsequent phases. An analytical model is developed to study the propagation of a rippled shock and the deformation of an ablation surface driven by non-uniform laser ablation. Agreement between theory and experiment is found in the propagation of the shock front ripple and also in areal mass density perturbation. A new instability of the uniform contact surface is found to be driven by the rippled shock. For both linear and non-linear cases, the growth rate depends on the phase of the oscillating shock wave at the time when the shock hits the contact surface. Exact analytical solutions of the linear growth rates for the Richtrryer-Meshkov instability are found for both reflected shock and reflected rare action cases. They agree well with recent experiments. Two dimensional (2-D) Fokker-Planck heat transport is introduced in a 2-D hydrodynamic code to study the RT instability at the ablation surface. Non-local heat transport is shown to play an important role in reducing the growth rate. 2-D simulations are also carried out to study the neutron yield reduction observed in the GEKKO XII laser implosion experiments. It is found that odd number non-uniformity is dominant in repelling the fuel from the centre and in reducing the neutron yield. A new type of self-similar solution, which determines the stagnation dynamics, is obtained, and the density gradient generated by the conduction is shown to reduce the RT growth.
Laser fusion research at ILE Osaka University 査読

S Nakai, M Nakatsuka, H Fujita, N Miyanaga, T Jitsuno, T Kanabe, Y Izawa, T Norimatsu, M Takagi, T Yamanaka, Y Kato, H Azechi, H Nishimura, H Shiraga, M Nakai, KA Tanaka, R Kodama, H Takabe, K Nishihara, K Mima, Y Kitagawa, S Sakabe, M Yamanaka, Y Kosaki, C Yamanaka, T Sasaki, Y Mori, K Miyazaki, M Nishikawa, H Kan, T Hiruma, Y Soman, H Ito, JM Perlado, E Alonso, E Munoz, J Sanz

FUSION TECHNOLOGY 30 ( 3 ) 625 - 633 1996年12月

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The progress of laser fusion research at the Institute of Laser Engineering, Osaka University is reviewed. They are physics investigations on target implosion, development of laser technologies, and R&D for laser fusion power plants. The long term strategy of Inertial Fusion Energy (IFE) development has been reexamined taking into account the recent progress of implosion physics and reactor related technologies.
Measurements of Absorption Distribution by Second Harmonic and X-Ray Images

Kazuo A. Tanaka, Tomoki Ohnishi, Atsunori Ozaki, Tomohiro Matsushita, Mikio Nakasuji, Hiroyuki Hashimoto, Ryosuke Kodama, Yasushi Oshikane, Mitsuo Nakai, Masahiro Tsukamoto, Shinji Matsuioka, Kouji Tubakimoto, Masakatsu Murakami, Yoshinori Simada, Hiroshi Azechi, Hiroyuki Nishimura, Noriaki Miyanaga, Hiroyuki Shiraga, Yoshiaki Kato, Kunioki Mima, Sadao Nakai

Laser Interaction and Related Plasma Phenomena, pp.131-135 1996年7月

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【工学部論文データから移行】
Recent progress of implosion experiments with uniformity-improved GEKKO XII laser facility at the Institute of Laser Engineering, Osaka University 査読

K Mima, Y Kato, H Azechi, K Shigemori, H Takabe, N Miyanaga, T Kanabe, T Norimatsu, H Nishimura, H Shiraga, M Nakai, R Kodama, KA Tanaka, M Takagi, M Natatsuka, K Nishihara, T Yamanaka, S Nakai

PHYSICS OF PLASMAS 3 ( 5 ) 2077 - 2083 1996年5月

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The irradiation uniformity of the GEKKO XII laser [C. Yamanaka et al., IEEE J. Quantum Electron. QE-17 1639 (1981)] has been improved by using partially coherent light with angular spectral dispersion and by improving power balance among the beams. Implosion experiments with the uniformity-improved GEKKO XII have been carried out in order to demonstrate stable formation of the hot spark. The isentrope of the compressed pellet shell is controlled by adding a prepulse to enhance the ablative stabilization of the Rayleigh-Taylor instability. The implosion dynamics has been investigated by x-ray imaging and neutron diagnostics. The experimental results are compared with the mix model prediction based on the one-dimensional hydrodynamic simulation. The degradation of neutron yield is attributed to the low-mode asymmetry. Finally, recent results of planer target experiments on the ablative stabilization of the Rayleigh-Taylor instability are also presented. The observed linear growth rate was about 50% of the classical growth rate and was lower than that of the theoretical prediction, based on the Takabe formula combined with the one-dimensional simulation. (C) 1996 American Institute of Physics.
Development of XUV lasers at the RAL central laser facility 査読

MH Key, WJ Blyth, AE Dangor, P Dhez, A Djoui, L Dwivedi, M Holden, PB Holden, P Jaegle, CLS Lewis, AG McPhee, A Modena, M Nakai, D Neely, PA Norreys, AA Offenberger, GJ Pert, JA Ploues, SG Preston, SA Ramsden, SJ Rose, B Russ, CG Smith, A Sureau, GJ Tallents, F Walsh, JS Wark, YL You, J Zhang

OPTICAL AND QUANTUM ELECTRONICS 28 ( 3 ) 201 - 208 1996年3月

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Recent progress in the development of XUV lasers by research teams using high-power and ultrashort-pulse Nd:glass and KrF laser facilities at the Rutherford Appleton Laboratory is reviewed. Injector-amplifier operation and prepulse enhanced output of the Ge XXIII collisional laser driven by a kilojoule glass laser, enhanced gain in CVI recombination with picosecond CPA drive pulses from a glass laser, and optical field ionization and XUV harmonic generation with a KrF CPA laser are described.
High-order harmonics of 248.6-nm KrF laser from helium and neon ions

SG Preston, A Sanpera, M Zepf, WJ Blyth, CG Smith, JS Wark, MH Key, K Burnett, M Nakai, D Neely, AA Offenberger

PHYSICAL REVIEW A 53 ( 1 ) R31 - R34 1996年1月

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We report high harmonic generation from a 248.6-nm KrF laser giving harmonic orders up to the 37th (67 Angstrom) in a helium gas jet and the 35th (71 Angstrom) in neon, for laser intensities up to 4 x 10(17) W/cm(2) in 380-fs pulses. These observations are interpreted using theoretical modeling that identifies the ion species He+, Ne+, and Ne2+ as the sources of the highest harmonics.
Development and application of ultra-bright laser and harmonic XUV sources 査読

MH Key, TW Barbee, JW Blyth, K Burnett, GF Cairns, AE Dangor, T Ditmire, A Djaoui, LB DaSilva, A Demir, A Dyson, AP Fews, EE Fill, P Gibbon, P Lee, S Healy, M Holden, DH Kalantar, NS Kim, CLS Lewis, Y Li, J Lin, P Loukakos, AG McPhee, Mercer, I, S Moustaizis, M Nakai, D Neely, P Norreys, AA Offenberger, GJ Pert, SG Preston, BA Remmington, A Sanpera, D Schlogl, CG Smith, R Smith, J Steingruber, GJ Tallents, F Walsh, JS Wark, J Warwick, E Wolfrum, M Zepf, J Zhang

X-RAY LASERS 1996 ( 151 ) 9 - 16 1996年

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Experimental work with high intensity lasers at the Rutherford Appleton Laboratory has led to the production of both XUV laser and XUV harmonic sources with extreme brightness. In particular an efficient XUV laser source has been developed based on collisionally excited neon -like Ge XXIII(J=0-1) at 19.6 nm using the high power glass laser Vulcan generating 75 ps pulses. With Vulcan operating in sub -ps CPA mode, extremely powerful and short wavelength XUV high harmonic sources have been obtained by irradiation of solid targets and recombinant laser action with high gain has been demonstrated with fibre targets. An ultra-bright Krypton-fluoride laser system, Sprite(recently upgraded to a new configuration Titania) has produced the shortest harmonic wavelength (6.7 nm) and has been used to assess the possibilities of optical field ionised recombinant laser action with gas jet targets. The Ge XUV laser has been successfully applied in fusion research for radiographic measurements of the effect of laser speckle on the hydrodynamic stability of laser accelerated thin foils. The present status of the work, the comparative performance of the XUV laser and harmonic sources and near-term future directions are reviewed.
Implosion experiments with uniformity-improved GEKKO XII: Overview

Y Kato, H Azechi, H Takabe, N Miyanaga, T Kanabe, T Norimatu, H Nishimura, H Shiraga, M Nakai, R Kodama, KA Tanaka, M Takagi, M Nakatsuka, K Nishihara, K Mima, T Yamanaka, S Nakai

LASER INTERACTION AND RELATED PLASMA PHENOMENA pp101-107 ( 369 ) 101 - 107 1996年
rho Delta R measurement of imploded cryogenic foam target by DD-protons

Y Kitagawa, KA Tanaka, M Nakai, T Yamanaka, K Nishihara, H Azechi, N Miyanaga, T Norimatsu, T Kanabe, C Chen, A Richard, M Sato, H Furukawa, S Nakai

LASER INTERACTION AND RELATED PLASMA PHENOMENA pp.136-142 ( 369 ) 136 - 141 1996年
Stimulated Raman scattering from two overlapped 527 nm laser beams 査読

M Tsukamoto, KA Tanaka, K Mima, R Kodama, M Kado, S Nakaji, A Nishiguchi, M Nakai, T Norimatsu, K Nishihara, T Yamanaka, S Nakai

LASER INTERACTION AND RELATED PLASMA PHENOMENA ( 369 ) 459 - 464 1996年
DYNAMIC BEHAVIOR OF RIPPLED SHOCK-WAVES AND SUBSEQUENTLY INDUCED AREAL-DENSITY-PERTURBATION GROWTH IN LASER-IRRADIATED FOILS (VOL 74, PG 3608, 1995) 査読

T ENDO, K SHIGEMORI, H AZECHI, A NISHIGUCHI, K MIMA, M SATO, M NAKAI, S NAKAJI, N MIYANAGA, S MATSUOKA, A ANDO, KA TANAKA, S NAKAI

PHYSICAL REVIEW LETTERS 75 ( 15 ) 2908 - 2908 1995年10月
Observation of Plasma Density Profile in Cylinder-Type X-Ray-Driven Fusion Target by GIR Method

Yasushi Oshikane, Masahiro Tsukamoto, Kazuo A. Tanaka, Shin-ichi Nakaji, Tomoki Ohnishi, Hiroyuki Hashimoto, Mitsuo Nakai, Hideaki Takabe, Kunioki Mima, Yoshiaki Kato, Sadao Nakai, Akio Nishiguchi, Osaka Institute of Technology

Bulletin of The American Physical Society, Vol.40, No.11, p.1783 1995年10月

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【工学部論文データから移行】
AREAL DENSITY-MEASUREMENT OF IMPLODED CRYOGENIC TARGET BY ENERGY PEAK SHIFT OF DD-PRODUCED PROTONS

Y KITAGAWA, KA TANAKA, M NAKAI, T YAMANAKA, K NISHIHARA, H AZECHI, N MIYANAGA, T NORIMATSU, T KANABE, C CHEN, A RICHARD, M SATO, H FURUKAWA, S NAKAI

PHYSICAL REVIEW LETTERS 75 ( 17 ) 3130 - 3133 1995年10月

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DD-produced protons are used to measure the imploded fuel-shell areal density rho Delta R. Twelve green beams of the GEKKO XII laser directly imploded a cryogenic foam-shell target containing a liquid or solid D-2 fuel. The proton emission is detected through a dipole magnet on a CR-39 plate, whose energy shift from 3.02 MeV yielded the maximum rho Delta R of 10 mg/cm(2) or the density of 6 g/cm(3), in agreement with that from the secondary neutron method within a factor of 2. The proton energy spread is sensitive to the laser energy imbalance.
CRYOGENIC DEUTERIUM TARGET EXPERIMENTS WITH THE GEKKO-XII, GREEN LASER SYSTEM

KA TANAKA, T YAMANAKA, K NISHIHARA, T NORIMATSU, N MIYANAGA, H SHIRAGA, M NAKAI, Y KITAGAWA, R KODAMA, T KANABE, H AZECHI, M HEYA, T JITSUNO, M KADO, K MIMA, M NAKATSUKA, A NISHIGUCHI, H TAKABE, M TAKAGI, K TSUBAKIMOTO, M TSUKAMOTO, Y KATO, Y IZAWA, S NAKAI

PHYSICS OF PLASMAS 2 ( 6 ) 2495 - 2503 1995年6月
DYNAMIC BEHAVIOR OF RIPPLED SHOCK-WAVES AND SUBSEQUENTLY INDUCED AREAL-DENSITY-PERTURBATION GROWTH IN LASER-IRRADIATED FOILS

T ENDO, K SHIGEMORI, H AZECHI, A NISHIGUCHI, K MIMA, M SATO, M NAKAI, S NAKAJI, N MIYANAGA, S MATSUOKA, A ANDO, KA TANAKA, S NAKAI

PHYSICAL REVIEW LETTERS 74 ( 18 ) 3608 - 3611 1995年5月
STIMULATED RAMAN-SCATTERING FROM SYMMETRICALLY ILLUMINATED 2-LAYERED SPHERICAL TARGETS WITH 527-NM LASER LIGHT 査読

M TSUKAMOTO, KA TANAKA, K MIMA, M KADO, S MIYAMOTO, M NAKAI, T NORIMATSU, M TAKAGI, K NISHIHARA, T YAMANAKA, S NAKAI, A NISHIGUCHI

PHYSICS OF PLASMAS 2 ( 2 ) 486 - 492 1995年2月
Erratum: Dynamic behavior of rippled shock waves and subsequently induced areal-density-perturbation growth in laser-irradiated foils (Physical Review Letters (1995) 75, 15) 査読

Endo T, Shigemori K, Azechi H, Nishiguchi A, Mima K, Sato M, Nakai M, Nakaji S, Miyanaga N, Matsuoka S, Ando A, Tanaka K.A, Nakai S

Physical Review Letters 75 ( 15 ) 1995年
HIGH HARMONIC-GENERATION WITH A CPA KRF LASER 査読

M ZEPF, W BLYTH, MH KEY, M NAKAI, SG PRESTON, JS WARK

LASER INTERACTION WITH MATTER ( 140 ) 467 - 470 1995年

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High harmonics have been observed from a 0.8 TW, 350-fs KrF CPA laser focused to 8 x 10(17) W cm(-2) in gas jet targets. Estimates of the absolute conversion efficiencies have been made. The efficiency and relative strength of the harmonics was found to be largely independent of the position of the laser focus within the gas jet, and of the density, suggesting a coherence length limited by dephasing effects due to plasma electrons. The highest harmonics are attributed to ions rather than neutrals.
IMPLOSION EXPERIMENTS OF CRYOGENICALLY COOLED TARGETS 査読

T YAMANAKA, KA TANAKA, K NISHIHARA, T NORIMATSU, H SHIRAGA, Y KITAGAWA, N MIYANAGA, H AZECHI, H NISHIMURA, M NAKAI, R KODAMA, M HEYA, M TAKAGI, Y IZAWA, T KANABE, T JITSUNO, M NAKATSUKA, K MIMA, M MURAKAMI, S NAKAI, T ENDO, C YAMANAKA

LASER INTERACTION WITH MATTER ( 140 ) 25 - 28 1995年

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Cryogenically cooled deuterium targets with plastic ablator are imploded as well as plastic targets with deuterium gas at laser intensities of 4-5x10(14) W/cm(2) and 1-2x10(14) W/cm(2). The low intensity shots showed neutron yields normalized by 1-D simulation to be one tenth up to convergence ratio of 30, while those at the high intensity are one hundredth. The observed neutron yields and density radius product rho Rs are respectively 10(8) and 8 mg/cm(2) for cryogenic liquid targets. 2-D x-ray images obtained with a 10 ps temporal resolution camera reveal previously undiscovered information of imploding core plasmas.
Observation of Raman light in expanding plasmas from two-layered spherical targets irradiated with 527 nm laser

M. Tsukamoto, K. A. Tanaka, K. Mima, M. Kado, S. Miyamoto, M. Nakai, T. Norimatsu, M. Takagi, K. Nishihara, T. Yamanaka, S. Nakai

Technol. Repts. Osaka Univ. 1994年10月
RECENT PROGRESS IN LASER FUSION-RESEARCH AT OSAKA-UNIVERSITY - UNIFORMITY AND STABILITY ISSUES

K NISHIHARA, M MURAKAMI, H AZECHI, T JITSUNO, T KANABE, M KATAYAMA, N MIYANAGA, M NAKAI, M NAKATSUKA, K TSUBAKIMOTO, S NAKAI

PHYSICS OF PLASMAS 1 ( 5 ) 1653 - 1661 1994年5月

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Improvement of laser irradiation uniformity in the Gekko XII system [IEEE J. Quantum Electron. QE-17, 1639 (1981)], both single beam pattern and power balance, is discussed. Substantial reduction of laser absorption nonuniformity is obtained for spherical harmonic modes greater than 15 by introducing spectrally dispersed amplified spontaneous emission. No perturbation growth is observed in flat foils accelerated by spectrally dispersed amplified spontaneous emission. Dependences of laser absorption uniformity on beam pattern and power imbalance are investigated in detail. The design goal of the power imbalance in the precision Gekko XII system is 3% in peak to valley, and laser absorption nonuniformity is estimated to be a few percent. Growth of hydrodynamic instabilities is analyzed for high convergence ratio implosions in the precision Gekko XII system.
IMPLOSION OF D-2 TEMPERATURE-CONTROLLED CRYOGENIC FOAM TARGETS WITH PLASTIC ABLATORS

A RICHARD, KA TANAKA, K NISHIHARA, M NAKAI, M KATAYAMA, YO FUKUDA, T KANABE, Y KITAGAWA, T NORIMATSU, M NAKATSUKA, T YAMANAKA, M KADO, T KAWASHIMA, C CHEN, M TSUKAMOTO, S NAKAI

PHYSICAL REVIEW E 49 ( 2 ) 1520 - 1526 1994年2月

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The implosion hydrodynamics of temperature-controlled cryogenic deuterium foam targets with plastic ablators is investigated. The experimental data recorded with x-ray imaging systems are compared to a one-dimensional (1D) simulation. The ablation front trajectories derived from x-ray streak-camera data agree with 1D simulation. However, an x-ray core emission is observed at an earlier time, and for a longer duration than that predicted. For the three liquid-fuel shots, the convergence ratios are, respectively, 0.4, 0.9, and 0.7 times that predicted by the ID simulation.
4.8-KEV X-RAY BACKLIGHT FRAMING METHOD FOR OBSERVING IMAGES OF SOFT-X-RAY-DRIVEN FUSION CAPSULES

M KATAYAMA, H SHIRAGA, M NAKAI, T KOBAYASHI, Y KATO

REVIEW OF SCIENTIFIC INSTRUMENTS 64 ( 3 ) 706 - 710 1993年3月

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We report on a diagnostic method for observing the implosion asymmetry of soft-x-ray-driven fusion capsules. The method consists of an x-ray backlight source using a 4.8-keV quasi-monochromatic titanium x-ray source and a fast multiframe x-ray imaging system. With the proper combination of spectral filters and photocathode to reduce intense background x rays from a gold cavity plasma, x-ray backlighting images of the fusion capsules have been successively obtained with spatial and temporal resolutions of 20 mum and 80 ps, respectively. These images are used to study the implosion velocity and the lower-mode distortion caused by x-ray irradiation nonuniformity on the imploding fusion capsule.
IMPLOSION EXPERIMENTS INVOLVING CRYOGENIC FOAM TARGETS WITH PLASTIC ABLATOR

T YAMANAKA, K NISHIHARA, KA TANAKA, T NORIMATSU, Y KITAGAWA, M NAKAI, M TAKAGI, A RICHARD, M KATAYAMA, C CHEN, M KADO, M TSUKAMOTO, T JITSUNO, R KODAMA, H AZECHI, N MIYANAGA, K MIMA, M NAKATSUKA, S NAKAI, T KANABE, M MURAKAMI, A NISHIGUCHI, C YAMANAKA

PLASMA PHYSICS AND CONTROLLED NUCLEAR FUSION RESEARCH 1992, VOL 3 pp 151-158 151 - 158 1993年
PHYSICS HIGHLIGHTS OF THE GEKKO12-PROGRAM 査読

K MIMA, S NAKAI, H AZECHI, A NISHIGUCHI, H TAKABE, N MIYANAGA, H NAKANO, M NAKAI, M KATAYAMA, K NISHIHARA, N NAKATSUKA, T JITSUNO, K TANAKA, H NISHIMURA, H SHIRAGA, T ENDO, T YAMANAKA, Y KATO, C YAMANAKA

PLASMA PHYSICS AND CONTROLLED FUSION 34 ( 13 ) 1775 - 1783 1992年12月

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Recently, hollow shell pellets have been imploded uniformly by the Gekko 1 2 laser system to be compressed to several hundreds g/cm3. The compressed density has been measured both by the neutron activation methods and the electron degeneracy measurement. The densities given by the above two methods are consistent.
The target parameter dependences of the density are analyzed with die one climensional implosion simulation code. Except the case of high convergence ratio implosion, the compressed plasma density obtained by the simulation code with nonlocal heat transport and/or high energy electron preheating agrees with the experimental results. As for the high convergence implosion, the one dimensional simulation does not give good prediction of the implosion, in particular for the neutron yield. Actually, the experimental neutron yield for the convergence ratio higher than 20 is lower by more than two orders of magnitude than the simulation value.
The preheating and stability are the key physics for die high density compression. As for the preheating, it turns out that the two plasmon decay plays an important role in the accelerated shell preheating. As for the stability, the initial target surface roughness and the laser irradiation non-uniformity are carefully checked. By the theoretical stability analysis, the stability of the high density compression is found to be marginal. Therefore, we are afraid that the neutron yield may degradate by the hot-cold plasma mixing. The details of the Rayleigh-Taylor instability analysis and experiments are discussed in the text.
二層構造球殼ターゲットにおける527nmレーザー光励起誘導ラマン散乱の発生

塚本雅裕, 田中和夫, 中井光男, 片山誠, 金辺忠, 西口彰夫, 三間圀興, 西原功修, 山中龍彦, 中井貞男

核融合研究 68 91 - 101 1992年11月

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【国立情報学研究所情報から移行】
COMPRESSION EXPERIMENTS AND PROSPECTS OF THERMONUCLEAR REACTION IGNITION ON GEKKO-XII INSTALLATION UNDER LTF PROGRAM 査読

S NAKAI, K MIMA, K AZECHI, N MIYANAGA, A NISHIGUCHI, T YAMANAKA, K NISHIKHARA, KA TANAKA, M NAKAI, R KODAMA, M KATAYAMA, M KADO, M TSUKOMOTO, KATO, I, K NISHIMURA, K SHIRAGA, T ENDO, M NAKATSUKA, T SASAKI, T YUTSUNO, K IOSHIDA, T KANABE, K NAKANO, M YAMANAKA, K NAITO, T NORIMATSU, M TAKAGI, T CHEN, Y IZAVA, S YAMANAKA

KVANTOVAYA ELEKTRONIKA 19 ( 10 ) 947 - 974 1992年10月

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Experimental results on high density compression of thermonuclear fuel on Gekko-XII installation are reported. The density of the compressed matter is up to 600 times high than the solid state density, rhoR parameter being 0.51 +/- 0.14 g/cm2. Prospects of going from the compression experiments to thermonuclear reaction ignition and high gain are studied numerically. A deeper insight into the processes occurring in the target cavity with indirect compression has been gained.
LASER FUSION - HIGH-DENSITY COMPRESSION EXPERIMENT AND IGNITION PROGRAM WITH GEKKO-XII 査読

S NAKAI, K MIMA, H AZECHI, N MIYANAGA, A NISHIGUCHI, T YAMANAKA, K NISHIHARA, KA TANAKA, M NAKAI, R KODAMA, M KATAYAMA, M KADO, M TSUKAMOTO, Y KATO, H TAKABE, H NISHIMURA, H SHIRAGA, T ENDO, M NAKATSUKA, T SASAKI, T JITSUNO, K YOSHIDA, T KANABE, H NAKANO, K TSUBAKIMOTO, M YAMANAKA, K NAITO, T NORIMATSU, M TAKAGI, T CHEN, Y IZAWA, C YAMANAKA

LASER INTERACTION AND RELATED PLASMA PHENOMENA, VOL 10 10 443 - 502 1992年
TIME-RESOLVED MEASUREMENTS OF LASER-INDUCED SHOCK-WAVES IN DEUTERATED POLYSTYRENE POROUS TARGETS BY X-RAY BACKLIGHTING

R KODAMA, KA TANAKA, M NAKAI, K NISHIHARA, T NORIMATSU, T YAMANAKA, S NAKAI

PHYSICS OF FLUIDS B-PLASMA PHYSICS 3 ( 3 ) 735 - 744 1991年3月

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Experimental studies are presented of laser-driven shock waves in deuterated polystyrene porous targets observed with x-ray streak shadowgraphy. Using two different target-mass densities of 0.1 g/cm3 and 0.2 g/cm3, the density dependence of the shock velocity was obtained as upsilon-s proportional-rho-0.45 +/- 0.02 and agreed well with a simple scaling obtained from the Hugoniot relation. X-ray shadowgraphy has shown a shock formation in porous targets and analysis suggests that there are two parts to compression waves: a shock front and a following pileup zone of multiple shock waves. Temporal histories of the pressure, the temperature, and the compression were estimated from the measured shock velocities and the opacities. It was found that the pressure peak due to the shock front was retarded to that by the pileup zone. The pileup zone had a higher compression and followed a thermodynamic condition closer to an adiabat than the shock front.
MULTIFRAME X-RAY-IMAGING SYSTEM FOR TEMPORALLY AND SPATIALLY RESOLVED MEASUREMENTS OF IMPLODING INERTIAL CONFINEMENT FUSION-TARGETS

M KATAYAMA, M NAKAI, T YAMANAKA, Y IZAWA, S NAKAI

REVIEW OF SCIENTIFIC INSTRUMENTS 62 ( 1 ) 124 - 129 1991年1月

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A compact and simple multiframe x-ray imaging system was developed in order to monitor the implosion of spherical targets in inertial confinement fusion research. Time intervals between consecutive frames can be adjusted flexibly, and the maximum number of adjacent frames is 20 for an overall duration of 1.4 ns. Each frame is recorded with a temporal resolution of 83 +/- 20 ps, a spatial resolution of 10 lp/mm at a modulation transfer function of 20%, and an intensity dynamic range of 10(3). A proximity focused image intensifier with two microchannel plates allows to obtain a gain of 10(5). Measured temporal response and gain characteristics could be reproduced by a simple Monte Carlo calculation.
ANNEALING OF POLYSTYRENE MICROCAPSULES FOR INERTIAL CONFINEMENT FUSION EXPERIMENTS 査読

S KOBAYASHI, T NORIMATSU, M NAKAI, KA TANAKA, T YAMANAKA, S NAKAI, K ITO

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS 9 ( 1 ) 150 - 153 1991年1月

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An underwater-annealing technique has been developed to recover the original strength of fragile polystyrene (PS) microcapsules fabricated by an emulsion technique. PS microcapsules are heated up to 120-degrees-C in a pressurized chamber prior to the dehydration process. This is done to recover the strength required for the pressure difference across the shell wall during fuel filling for inertial confinement fusion experiments.
HIGH-DENSITY COMPRESSION EXPERIMENTS AT ILE, OSAKA 査読

H AZECHI, T JITSUNO, T KANABE, M KATAYAMA, K MIMA, N MIYANAGA, M NAKAI, S NAKAI, H NAKAISHI, M NAKATSUKA, A NISHIGUCHI, PA NORRAYS, Y SETSUHARA, M TAKAGI, M YAMANAKA

LASER AND PARTICLE BEAMS 9 ( 2 ) 193 - 207 1991年

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Direct-drive implosion experiments on the GEKKO XII laser (9 kJ, 0.5-mu-m, 2 ns) with deuterium and tritium (DT) exchanged plastic hollow shell targets demonstrated fuel areal densities (rho-R) of approximately 0.1 g/cm2 and fuel densities of approximately 600 times liquid density at fuel temperatures of approximately 0.3 keV. (The density and rho-R values refer only to DT and do not include carbons in the plastic targets.) These values are to be compared with thermonuclear ignition conditions, i.e. fuel densities of 500-1000 times liquid density, fuel areal densities greater than 0.3 g/cm2, and fuel temperatures greater than 5 keV. The irradiation nonuniformity in these experiments was significantly reduced to a level of < 5% in root mean square by introducing random-phase plates. The target irregularity was controlled to a 1% level. The fuel rho-R was directly measured with the neutron activation of Si, which was originally compounded in the plastic targets. The fuel densities were estimated from the rho-R values using the mass conservation relation, where the ablated mass was separately measured using the time-dependent X-ray emission from multilayer targets. Although the observed densities were in agreement with one-dimensional calculation results with convergence ratios of 25-30, the observed neutron yields were significantly lower than those of the calculations. This suggests the implosion uniformity is not sufficient to create a hot spark in which most neutrons should be generated.
HIGH-DENSITY COMPRESSION OF HOLLOW-SHELL TARGET BY GEKKO XII AND LASER FUSION-RESEARCH AT ILE, OSAKA-UNIVERSITY 査読

S NAKAI, K MIMA, M YAMANAKA, H AZECHI, N MIYANAGA, A NISHIGUCHI, H NAKAISHI, YW CHEN, Y SETSUHARA, PA NORREYS, T YAMANAKA, K NISHIHARA, KA TANAKA, M NAKAI, R KODAMA, M KATAYAMA, Y KATO, H TAKABE, H NISHIMURA, H SHIRAGA, T ENDO, K KONDO, M NAKATSUKA, T SASAKI, T JITSUNO, K YOSHIDA, T KANABE, A YOKOTANI, T NORIMATSU, M TAKAGI, H KATAYAMA, Y IZAWA, C YAMANAKA

LASER INTERACTION AND RELATED PLASMA PHENOMENA, VOL 9 9 25 - 67 1991年
DEVELOPMENT OF X-RAY-EMISSION COMPUTED-TOMOGRAPHY FOR ICF RESEARCH

M NAKAI, S SHINOHARA, M KATAYAMA, YW CHEN, S KOBAYASHI, N MIYANAGA, KA TANAKA, K NISHIHARA, M YAMANAKA, T YAMANAKA, S NAKAI

REVIEW OF SCIENTIFIC INSTRUMENTS 61 ( 10 ) 2783 - 2785 1990年10月
X-RAY AND PARTICLE DIAGNOSTICS OF A HIGH-DENSITY PLASMA BY LASER IMPLOSION

M NAKAI, M YAMANAKA, H AZECHI, YW CHEN, T JITSUNO, M KATAYAMA, M MIMA, N MIYANAGA, H NAKAISHI, M NAKATSUKA, A NISHIGUCHI, PA NORREYS, Y SETSUHARA, M TAKAGI, T NORIMATSU, T YAMANAKA, C YAMANAKA, S NAKAI

REVIEW OF SCIENTIFIC INSTRUMENTS 61 ( 10 ) 3235 - 3240 1990年10月
3-DIMENSIONAL IMAGING OF LASER IMPLODED TARGETS 査読

YW CHEN, N MIYANAGA, M YAMANAKA, M NAKAI, K TANAKA, K NISHIHARA, T YAMANAKA, S NAKAI

JOURNAL OF APPLIED PHYSICS 68 ( 4 ) 1483 - 1488 1990年8月
Three-dimensional imaging of laser imploded targets

Y.-W.Chen, N.Miyanaga, M.Yamanaka, M.Nakai, K.A.Tanaka, K.Nishihara, T.Yamanaka, S.Nakai

J. Appl. Phys. Vol.68 pp.1483-1488[SCI] 1990年8月
3a-T-7 X線駆動爆縮核融合III : コアパラメータ

小林尚志, 遠藤琢磨, 白神宏之, 西村博明, 高部英明, 坂部周二, 加藤義章, 中井貞雄, GODグループ, Mグループ, Tグループ, OTグループ

秋の分科会予稿集 1990.4 190 1990年
X線エミッションCTによる爆縮プラズマの3次元温度分布測定 : 情報入力情報ディスプレイ(<特集>画像変換装置特集)

中井光男, 篠原誠一, 片山誠, 陳延偉, 宮永憲明, 田中和夫, 山中正宣, 西原功修, 山中龍彦, 中井貞雄

テレビジョン学会技術報告 14 ( 31 ) 53 - 57 1990年

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A computed tomographic technique has been developed to diagnose laser-irradiated shperical targets using x-ray emission. The three-dimensional x-ray distribution was reconstructed by using an algebraic reconstruction technique (ART) from x-ray pinhole camera images obtained along different sight directions. 3-D distributions of electron temperature and relative density were measured by use of an absorption filter technique with x-ray fluorescent screens.
レーザー計測

塚本雅裕, Vick D, 加道雅孝, 樹山英則, 畦地宏, 山中龍彦, 中井貞雄, 宮崎和彦, 富江敏尚, 近藤洋行, 矢野雅昭, 田中和夫, 吉田弘樹, 長田剛, 阪上幸男, 新田秀一, 朝倉利光, 野村毅, 山口博人, 山田敦, 吉田宇秀, 青森繁, 伊東元, 滝沢本承, 村原正隆, 安本真樹, 小林伸次, 片山誠, 中井光男, 乗松孝好, 児玉了祐

レーザー研究 18 ( 0 ) 183 - 186,189 1990年
レーザエネルギー応用

米田仁紀, 西尾匡弘, 山川考一, 白神宏之, 加藤義章, 大道博行, 曽観明, 戸川拓哉, 金炳泰, 金辺忠, 中塚正大, 新井達也, 有留宏明, 渡部俊久, 緑川克美, 小原實, 日下部直人, 安藤剛三, 屋代英彦, 橋本静代, 青柳克信, 井門俊治, 木村孝行, 吉田弘樹, 長田剛, 友松真次, 星屋英則, 阪上幸男, 佐々木明, 中石博之, 宮永憲明, 畦地宏, 節原裕一, 幸喜俊, 片山誠, 高木勝, 実野孝久, 西口彰夫, 三間圀興, 中井貞雄, Zeller P, Tanaka K. A, Norimatsu T, Nakai M, 寺田朋生, Kanabe T, Katayama H, Kodama R, Vick D, Katayama M, Kado M, Tsukamoto M, Kiyama H, Nishihara K, Yamanaka T, 三浦隆博, Yamanaka C, Nakai S, 児玉了祐, 田中和夫, 乗松孝好, 中井光男, 片山秀史, 道雅孝, 塚本雅裕, 西原功修, 村谷正之, 山中龍彦, 山中千代衛, 西村博明, 遠藤琢磨, 近藤公伯, 杉本耕一, 小林尚志, 高部英明, 植田憲一, 宅間宏

レーザー研究 18 ( 0 ) 128 - 133,138 1990年
クライオジェニックターゲット燃量層監視装置

塚本雅裕, 中井貞雄, 児玉了祐, 加道雅孝, 伊東元, 安本真樹, 乗松孝好, 中井光男, 田中和夫, 山中龍彦

レーザー研究 18 ( 9 ) 724 - 731 1990年

　詳細を見る

We have developed a monitoring system for the real-time characterization of cryogenic fuel layer in laser-fusion targets. This system is composed of an imaging interferometer, in addition to a normal target postion monitor with a single optical path. The fabrication process of a solid fuel layer in a plastic spherical shell is observed with this system. Solid fuel layer uniformity is displayed as concentric interference patterns. The distortions of the interference patterns can be interpreted as fuel layer nonuniformities.
CCDを用いたX線蛍光ピンホールカメラ

田中和夫, 篠原誠一, 中井光男, 山中龍彦, 中井貞雄

テレビジョン学会技術報告 13 ( 29 ) 1 - 4 1989年
X-RAY FRAMING CAMERA IMAGES OF IMPLODING TARGETS 査読

M KATAYAMA, KA TANAKA, T YAMANAKA, Y IZAWA, S NAKAI, M NAKAI, C YAMANAKA

X-RAY INSTRUMENTATION IN MEDICINE AND BIOLOGY, PLASMA PHYSICS, ASTROPHYSICS, AND SYNCHROTRON RADIATION 1140 406 - 410 1989年
レーザー計測

浦慶, 大場謙吉, 坂口総一郎, 谷山哲哉, 鈴木薫, 中田順治, 升谷孝也, 中島貞夫, 浅田智朗, 松井弘之, 甲藤正人, 北村新三, 黒沢宏, 佐々木亘, 青島紳一郎, 高橋宏典, 中村卓也, 土屋裕, 林光澤, 久保宇市, 片山誠, 西村博明, 笹野泰弘, 井澤靖和, 山中龍彦, 中井貞雄, 中井光男, 中根英昭, 前田三男, 柴田隆, 一森誠也, 小野高志, 秋吉英治

レーザー研究 17 ( 0 ) 185 - 193,198 1989年
レーザーエネルギー応用

三間圀興, 西口彰夫, Norreys P. A, 西村博明, 中石博之, 陳延偉, 節原裕一, 島田義則, 山中千代衛, 宮崎誠, 橋田昌樹, 中井貞雄, 首藤智一, 小坂学, 多田昭史, 阪部周二, 三間圀興, 近藤公伯, 小林尚志, 杉本耕一, 中西淑人, 遠藤琢磨, 山中正宣, 白神宏之, 高部英明, 加藤議章, 児玉了祐, 田中和夫, 中井光男, 加道雅孝, 冨田律也, 乗松好孝, 片山秀史, 実野孝久, 金辺忠, 西原功修, 山中龍彦, 椿原啓, 久保宇市, 真野豊司, 乗松孝好, 加藤義章, 井澤靖和, 足立智, 中塚正大, 仁木秀明, 黄国安, 加藤修司, 岡田芳樹, 里岡栄, 武内一夫, 和田一洋, 荒谷昌輝, 吉田国雄, 畦地宏, 宮永憲明, 高木勝

レーザー研究 17 ( 0 ) 127 - 135,144 1989年
FABRICATION OF A CRYOGENIC FOAM TARGET FOR INERTIAL CONFINEMENT FUSION EXPERIMENTS

T NORIMATSU, H KATAYAMA, T MANO, M TAKAGI, R KODAMA, KA TANAKA, Y KATO, T YAMANAKA, S NAKAI, Y NISHINO, M NAKAI, C YAMANAKA

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS 6 ( 6 ) 3144 - 3147 1988年11月
HYDRODYNAMIC INSTABILITY IN AN ABLATIVELY IMPLODED TARGET IRRADIATED BY HIGH-POWER GREEN LASERS 査読

H NISHIMURA, H TAKABE, K MIMA, F HATTORI, H HASEGAWA, H AZECHI, M NAKAI, K KONDO, T NORIMATSU, Y IZAWA, C YAMANAKA, S NAKAI

PHYSICS OF FLUIDS 31 ( 10 ) 2875 - 2883 1988年10月
SCALINGS OF IMPLOSION EXPERIMENTS FOR HIGH NEUTRON YIELD 査読

TAKABE H, YAMANAKA M, MIMA K, YAMANAKA C, AZECHI H, MIYANAGA N, NAKATSUKA M, JITSUNO T, NORIMATSU T, TAKAGI M, NISHIMURA H, NAKAI M, YABE T, SASAKI T, YOSHIDA K, NISHIHARA K, KATO Y, IZAWA Y, YAMANAKA T, NAKAI S

Physics of Fluids 31 ( 10 ) 2884 - 2893 1988年
レーザーエネルギー応用

疇地宏, 三間圀興, 山中千代衛, 中井貞雄, 中井光男, 島田耕治, 西村博明, 近藤公伯, 白神宏之, 加藤義章, 遠藤琢磨, 宮永憲明, 中西淑人, 矢部孝, 大山俊之, 横田千秋, 西沢博, 小林雅義, 石井忠浩, 武内一夫, 乗松孝好, 真野豊司, 中石博之, 片山秀史, 児玉了祐, 西野嘉也, 田中和夫, 高木勝, 椿原啓, 久保宇市, 実野孝久, 金辺忠, 横谷篤至, 陳延偉, 佐々木孝友, 吉田国雄, 中塚正大, 植田憲一, 宅間宏, 笹川照夫, 川原章裕, 小原實, 北川米喜, 中山師生, 節原裕一, 澤井清信, 三問圀興, 畦地宏, 大東延久, 松本孝之, 南畑毅, 奥村夏彦, 宮本照雄, 仁木秀明, 井澤靖和, 村上匡旦, 仲俊博, 小坂学, 橋田昌樹, 阪部周二, 山中龍彦, 望月孝晏, 多田昭史, 平原猛, 山中正宣, 西原功修, 高部英明

レーザー研究 16 ( 0 ) 101 - 103,108 1988年
超高速X線フレーミングカメラの開発 : "画像変換装置"合同研究会 : 電子装置 : 画像表示

片山誠, 中井光男, 西村博明, 山中龍彦, 井澤靖和, 中井貞雄, 山中千代衛

テレビジョン学会技術報告 12 ( 22 ) 27 - 34 1988年

　詳細を見る

We report on the construction and testing of a supra-high speed xray framing camera based on a gated microchannel plate. An infinite ground plane microstrip transmission-line configration is used. We used an InP optoelectric switch built into the microstrip transmission-line to generate the fast gating pulse. We have measured time and space resolution of the framing camera to. be better than 180psec and 15LP/mm. And coupling the camera with wolter type xray microscope, the xray images of a laser heated Au plasma were observed with 250psec intereframe time.
微小プラズマのX線エミッションCT : "画像変換装置"合同研究会 : 電子装置 : 画像表示

陳延偉, 西原功修, 嶋京子, 宮永憲明, 畦地宏, 中井光男, 田中和夫, 山中正宣, 山中龍彦, 中井貞雄, 田村進一

テレビジョン学会技術報告 12 ( 22 ) 15 - 20 1988年

　詳細を見る

A X-ray emission computed tomographic technique has been demonstrated to diagnose laser-irradiated spherical targets. The three dimensional X-ray distribution was estimated by using ART method from five pinhole camera images obtained along different sight directions. The relative error was estimated to be 15% from computer simulations. Obtained X-ray distribution were analyzed in detail comparing with the uniformity of laser focused on the target.
Stimulated Raman Scattering in Cannonball Targets 査読

Y. Sakawa, K. A. Tanaka, H. Nishimura, M. Nakai, T. Yabe, H. Sakurai, Y. Izawa, Y. Kato, T. Mochizuki, M. Nakatsuka, C. Yamanaka

Physics of Fluids 30 ( 10 ) 3276 - 3282 1987年10月
OBSERVATION OF HYDRODYNAMIC INSTABILITY IN SPHERICAL TARGET IMPLOSION WITH A GEKKO-XII GREEN LASER 査読

NISHIMURA, H, IZAWA, Y, TAKABE, H, MIMA, K, NAKAI, M, UCHIDA, S, HASEGAWA, H, NORIMATSU, T, NAKAI, S, NAKATSUKA, H, JITSUNO, T, SAKABE, S, YAMANAKA, C

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 3 ( 8 ) P166-P167 1986年8月
Suprathermal Electron Generation in Laser Fusion Targets

Y. Sakawa, H. Sakurai, T. Endo, Y. Arai, H. Hasegawa, S. Uchida, M. Nakai, H. Nishimura, H. Azechi, Y. Izawa, T. Yamanaka, C. Yamanaka

Technology Reports of Osaka University 1986年4月
Suprathermal Electron Generation in Cannonball Targets 査読

H. Nishimura, H. Azechi, M. Nakai, S. Uchida, Y. Sakawa, T. Wada, H. Hasegawa, H. Sakurai, T. Yamanaka, C. Yamanaka

Optics Communications 56 ( 6 ) 409 - 414 1986年1月
LASER IMPLOSION OF HIGH ASPECT-RATIO TARGETS PRODUCES THERMONUCLEAR NEUTRON YIELDS EXCEEDING 10(12) BY USE OF SHOCK MULTIPLEXING 査読

YAMANAKA C, NAKAI S, YABE T, NISHIMURA H, UCHIDA S, IZAWA Y, NORIMATSU T, MIYANAGA N, AZECHI H, NAKAI M, TAKABE H, JITSUNO J, MIMA K, NAKATSUKA M, SASAKI T, YAMANAKA M, KATO Y, MOCHIZUKI T, KITAGAWA Y, YAMANAKA T, YOSHIDA K

Physical Review Letters 56 ( 15 ) 1575 - 1578 1986年
レーザー核融合爆縮実験

井澤靖和, 宮永憲明, 仁木秀明, 田中和夫, 望月孝曇, 北川米喜, 中井光男, 白神宏之, 山中正宣, 山中龍彦, 畦地宏

レーザー研究 14 ( 12 ) 1090 - 1132 1986年
MEASUREMENTS OF INTENSITY SCALING OF ABLATION PRESSURE AT 10.6 MU-M AND 1.05 MU-M LASER WAVELENGTHS 査読

H DAIDO, R TATEYAMA, K OGURA, H AZECHI, M NAKAI, T YAMANAKA, K MIMA, S NAKAI, C YAMANAKA

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 23 ( 10 ) 1353 - 1356 1984年
LASER WAVELENGTH AND INTENSITY SCALING OF ABLATION PRESSURE FOR LASER FUSION TARGETS. 査読

Hiroyuki Daido, Ryuji Tateyama, Kazuki Ogura, Hiroshi Azechi, Mitsuo Nakai, Tatsuhiko Yamanaka, Kunioki Mima, Sadao Nakai, Chiyoe Yamanaka

Technology Reports of the Osaka University 33 ( 1684-1702 ) 89 - 95 1983年3月

　詳細を見る

In this report, the measurements of the ablation pressure and the mass ablation rate by 10. 6 mu m 1. 06 mu m and 0. 53 mu m laser irradiation using methods of the target pendulum, the observation of the thin foil acceleration, and the X-ray streaked shadow graph of the sphere target implosion are described. These results are compared with other experimental results and with the theoretical results based on the self-regulated flow model.
Laser fusion 査読

J. H. Nuckolls, A. M. Prokhorov, S. Singer, R. L. McCrory, C. Yamanaka, S. Nakai, T. Yamanaka, Y. Kato, T. Mochizuki, A. F. Gibson, H. Azechi, M. Nakai, T. Yabe, H. Shiraga, F. Mizutani

Applied Physics B Photophysics and Laser Chemistry 28 ( 2-3 ) 269 - 273 1982年6月
INTENSITY DEPENDENCE OF CLASSICAL AND COLLECTIVE ABSORPTION PROCESSES IN LASER-PRODUCED PLASMAS AT 1.053-MU-M AND 0.527-MU-M 査読

HAMA H, MIMA K, KATO Y, UENOYAMA T, MIYANAGA N, NAKAI M, YAMANAKA C

Ieee Transactions on Plasma Science 10 ( 1 ) 55 - 58 1982年
A COMPARISON OF ABLATIVE ACCELERATION MEASUREMENTS 査読

A RAVEN, H AZECHI, M NAKAI, T MATSUO, T YAMANAKA, C YAMANAKA

APPLIED PHYSICS LETTERS 40 ( 9 ) 776 - 778 1982年
カラスレーザー激光XII号システム

加藤義章, 的場幹史, 長田英紀, 豊田浩一, 難波進, 中井貞雄, 山中千代衛, 光野篤, 凌水謙正, 薬王輝雄, 寺井清寿, 大田一義, 沢井清信, 福丸文雄, 井沢靖和, 井上満夫, 大道博行, 藤田尚徳, 平井研三, 松嶋功, 大和田野, 芳郎, 葛西彪, 根本房司, 矢尾版昭, 富江敏尚, 中塚正大, 矢野雅昭, 松岡不識, McCall G, 西村博明, 八木誠, 山田家如勝, 水井順一, 山口直洋, 高木祥示, 西原功修, 吉田国雄, 岡田和之, 阪部周二, 菊池昭博, 白神宏之, 羽馬洋之, 藤原啓司, 川相勇二, 宮永憲明, 松本裕治, 小山和義, 山中龍彦, 谷本充司, Raven A, 松尾敏伸, 中井光男, 小原文雄, 間淵義宏, 北川博巳, 西村和利, 林文夫, 古川信朗, 望月孝晏, 阪上孝男, 有馬泉, 椿原啓, 久保宇市, 上野山雄, 三間圀興, 渡辺二太, マルクマカール, 山田良行, 西原秀範, 北川米喜, 横山昌弘, 西沢章光, 山中正宣, 岡島茂樹, 長坂啓吾, 高井正弘, 長島章, 藤田順治, 小泉俊郎, 牧野真吾, 黒田淳二, 野田信明, 綱脇恵章, 近璋三, 近藤道雄, 仲野重範, 武田佳宏, 巻出義紘, 萩原識, 粟原修, 武内一夫, 畦地宏, 石川洋一, 荒井重義, 富永健, 井上一郎, 中根良平, 大谷博康, 仁木秀明, 中島信昭, 吉原經太郎, 大山俊之

レーザー研究 9 ( 0 ) 45 - 58,65 1981年
27p-Y-14 ガラスレーザー激光IV号によるプラズマ実験 : VI レーザー光高調波変換とエネルギーバランス

羽馬洋之, 阪部周二, 中井光男, 宮永憲明, 森川鋭一, 加藤義章, 山中千代衛

年会予稿集 35.4 109 1980年

▼全件表示

MISC

激光XII号‐LFEXレーザーを用いたレーザー核融合高速点火方式による効率的な高エネルギー密度状態の生成

坂田匠平, LEE S, 森田大樹, 城崎知至, 澤田寛, 岩佐祐希, 松尾一輝, LAW King Fai Farley, 畑昌育, 砂原淳, 小島完興, 安部勇輝, 白戸高志, MORAC E Alessio, 余語覚文, 岩田夏弥, 劉暢, 李歓, 中井光男, 坂上仁志, 尾崎哲, 山ノ井航平, 乗松孝好, 中田芳樹, 時田茂樹, 宮永憲明, 河中準二, 白神宏之, 三間圀興, 西村博明, BAILLY‐GRANDVAUX Mathieu, SANTOS Jorge Joao, 長友英夫, 疇地宏, 兒玉了祐, 有川安信, 千徳靖彦, 藤岡慎介

プラズマ・核融合学会年会(Web) 35th ROMBUNNO.3Dp02 (WEB ONLY) 2018年
Pr³⁺添加APLF(20AI(PO₃)₃-80LiF)シンチレータの紫外光発光特性の温度特性

坪井瑞輝, 武田耕平, 中里智治, 河野雅弘, 山ノ井航平, Cadatal-RADUBAN Marilou, 酒井浩平, 西亮祐, 南佑輝, LUONG Mui Viet, 有川安信, 清水俊彦, 猿倉信彦, 乗松孝好, 中井光男, 疇地宏, 村田貴広, 藤野茂, 吉田英樹, 吉川彰, 佐藤仲弘, 菅博文, 鎌田圭

レーザー研究 = The review of laser engineering : レーザー学会誌 45 ( 3 ) 181 - 184 2017年3月
高速点火核融合加熱実験における中性子計測

有川安信, 小島完興, Lee Seungho, 松尾一輝, Farley Law, King Fai, 森田大樹, 上林祥平, 側貴行, 上司尚善, 長友英夫, 千徳靖彦, 安部勇輝, 畑昌育, 余語覚文, 戸崎翔太, 古賀啓資, 八尾顕, LFEX・GEKKO-XTeamIIチーム, 山ノ井航平, 乗松孝好, 清水俊彦, 中田芳樹, 岸本秀隆, 河仲準二, 時田茂樹, 白神宏之, 宮永憲明, 中井光男, 西村博明, 藤岡慎介, 疇地宏, 砂原淳, 染川智弘, 中島希, 城崎知至, 三間圀興, 坂上仁志, 尾崎哲, 加藤裕亮, 松原秋登, 岩佐祐希, 坂田匠平, Morace Alessio

日本物理学会講演概要集 72 ( 0 ) 960 - 960 2017年
超強磁場によるレーザーイオン加速の高効率化とナノ構造ターゲットによるシース電場の評価

余語覚文, MORACE A, 有川安信, 藤岡慎介, 戸崎翔太, 岩田夏弥, ZHANG Z, ZHANG Z, 小島完興, 坂田匠平, 安部勇輝, 李昇浩, LAW K. F, 松尾一樹, 側貴行, 西村博明, 白神宏之, 中井光男, 長友英夫, 山ノ井航平, 時田茂樹, 藤本靖, 河仲準二, 中田芳樹, 宮永憲明, 乗松孝好, 砂原淳, 城崎知至, 尾崎哲, 坂上仁志, 匂坂明人, 小倉浩一, BULANOV S. V, ESIRKEPOV T. Zh, PIROZHKOV A. S, 錦野将元, 近藤公伯, 三間圀興, 三間圀興, 疇地宏

大阪大学レーザーエネルギー学研究センター共同利用・共同研究成果報告書 2015 75 - 76 2016年3月
19aAP-7 高コントラストピコ秒レーザーによるパルス幅依存電子異常加熱現象を考慮したイオン加速エネルギースケーリング

余語覚文, 安部勇輝, 李昇浩, 松尾一輝, 側貴行, Law King, Fai Farley, 古賀啓資, 上司尚善, 長友英夫, 西村博明, 中井光男, 戸崎翔太, 白神宏之, 藤本靖, 山ノ井航平, 乗松孝好, 時田茂樹, 中田芳樹, 實野孝久, 河仲準二, 宮永憲明, Bulanov S. V, Morace Alessio, 匂坂明人, 小倉浩一, 城崎知至, 尾崎哲, 坂上仁志, 砂原淳, 三間圀興, 疇地宏, 有川安信, 藤岡慎介, 岩田夏弥, Zhang Zhe, 坂田匠平, 小島完興

日本物理学会講演概要集 71 ( 0 ) 548 - 548 2016年
21pCB-11 高コントラスト、ピコ秒、kJクラスレーザー駆動イオン加速の薄膜厚さ依存性

戸崎翔太, 安部勇輝, 李昇浩, 松尾一輝, 側貴行, Law K. K, 古賀啓資, 上司尚善, 長友英夫, 西村博明, 中井光男, 余語覚文, 白神宏之, 藤本靖, 山ノ井航平, 乗松孝好, 時田茂樹, 中田芳樹, 實野孝久, 河仲準二, 宮永憲明, Bulanov S. V, Alessio Morace, 匂坂明人, 小倉浩一, 城崎知至, 尾崎哲, 坂上仁志, 砂原淳, 三間圀興, 疇地宏, 有川安信, 藤岡慎介, 岩田夏弥, Zhe Zhang, 坂田匠平, 小島完興

日本物理学会講演概要集 71 ( 0 ) 948 - 948 2016年
中性子イメージングに向けたレーザー駆動重陽子加速実験と加速イオンによる中性子発生評価

古賀啓資, 安部勇輝, 李昇浩, 松尾一輝, 側貴行, Law King, Fai Farley, 長友英夫, 西村博明, 中井光男, 白神宏之, 藤本靖, 余語覚文, 山ノ井航平, 乗松孝好, 時田茂樹, 中田芳樹, 實野孝久, 河仲準二, 宮永憲明, 城崎知至, 砂原淳, 三間圀興, 戸崎翔太, 疇地宏, Alessio Morace, 有川安信, 藤岡慎介, 岩田夏弥, 坂田匠平, 小島完興

日本物理学会講演概要集 71 ( 0 ) 623 - 623 2016年
高強度レーザーによる薄膜からの陽子発生

匂坂明人, 小倉浩一, 錦野将元, PIROZHKOV Alexander S., 河内哲哉, 西内満美子, 今亮, 神門正城, 近藤公伯, 有川安信, 小島完興, MORACE Alessio, 戸崎翔太, 余語覚文, 中井光男, 西村博明

応用物理学会春季学術講演会講演予稿集(CD-ROM) 63rd 2016年
高エネルギー中性子による大型検体の非破壊検査技術の開発

有川安信, 松原秋登, 加藤裕亮, 岸本秀隆, 安部勇輝, 余語覚文, 西村博明, 中井光男, 白神宏之, 藤岡慎介, 疇地宏, 大竹淑恵, 小林知洋, 三間圀興

光量子工学研究-若手・中堅研究者から見た光量子工学の展開第4回理研シンポジウム平成28年 2016年
LFEXスポットサイズ計測の為の可視光散乱計測器の開発

側貴行, 有川安信, 長井隆浩, 小島完興, MORACE Alessio, 坂田匠平, 井上裕晶, 宇津木卓, 安部勇輝, 松尾一輝, 戸崎翔太, 清水俊彦, 余語覚文, 藤岡慎介, 西村博明, 中井光男, 疇地宏

日本物理学会講演概要集(CD-ROM) 70 ( 1 ) ROMBUNNO.24PBH-5 - 952 2015年3月
17pCP-1 外部磁場による相対論的電子ビーム輸送実験における磁場計測

Law King Fai Farley, 安部勇輝, 近藤康太郎, 城崎知至, 砂原淳, 坂上仁志, 尾崎哲, 三間圀興, 田口俊弘, Zhang Zhe, Santos Joao, 坂田匠平, Bailly-Grandvaux Mathieu, Bellei Claudio, Pollock Bradley, Moody John, 中井光男, 西村博明, 白神宏之, 長友英夫, 藤岡慎介, 疇地宏, 松尾一輝, 小島完興, 有川安信, Morace Alessio, Xavier Vaisseau, 戸崎翔太, 李昇浩

日本物理学会講演概要集 70 ( 0 ) 628 - 628 2015年
19aCP-4 プレプラズマが高強度レーザー生成高速電子のエネルギー分布及び発生効率に与える影響

小島完興, 戸崎翔太, 坂田匠平, 田口雄基, 松尾一輝, 安部勇輝, 李昇浩, 池之内孝仁, 加藤弘樹, 側貴行, Law King Fai, 有川安信, Xavier Vaisseau, 匂坂明人, 小倉浩一, Alexander PIROZHKOV, 錦野将元, 近藤公伯, 砂原淳, 城崎知至, 坂上仁志, 尾崎哲, 弘中陽一郎, 近藤康太郎, Zhang Zhe, Santos Joao, Bailly-Grandvaux Mathiue, Bellei Claudio, 長友英夫, 中井光男, 西村博明, 白神宏之, 藤岡慎介, 重森啓介, 疇地宏, 山本拓未, 川島丈嗣, Morace Alessio, 余語覚文, 畑昌育

日本物理学会講演概要集 70 ( 0 ) 697 - 697 2015年
18pCP-2 LFEXレーザー生成イオンのエネルギースペクトル分析

戸崎翔太, 安部勇輝, 松尾一輝, 側貴行, 田口雄基, 李昇浩, 長友英夫, 西村博明, 中井光男, 白神宏之, 藤本靖, 余語覚文, 山ノ井航平, 乗松孝好, 時田茂樹, 中田芳樹, 實野孝久, 河仲準二, 宮永憲明, S.V. Bulanov, 匂坂明人, A.S. Pirozhkov, Morace Alessio, T.Zh. Esirkepov, 小倉浩一, 近藤公伯, 城崎知至, 尾崎哲, 坂上仁志, 砂原淳, 三間圀興, 疇地宏, 有川安信, 藤岡慎介, 池之内考仁, Zhang Zhe, 坂田匠平, 小島完興

日本物理学会講演概要集 70 ( 0 ) 671 - 671 2015年
24aBH-6 支持ストーク切断による電気的に孤立した核融合ターゲットを用いた加熱実験

長井隆浩, Morace Alessio, 有川安信, 尾崎哲, 余語覚文, 藤岡慎介, 村上匡且, 中井光男, 白神宏之, 乗松孝好, 疇地宏, 安部勇輝, 小島完興, 坂田匠平, 池之内孝仁, 戸崎翔太, 側貴行, 松尾一輝, Zhe Zhang

日本物理学会講演概要集 70 ( 0 ) 928 - 928 2015年
The Study of the Low Energy Neutron Spectrum in the Inertial Confinement Fusion

Arikawa Y., Nagai T., Abe Y., Iwasa Y., Fujioka N., Sarukura S., Nakai M., Shiraga H., Azechi H., Murata T.

2014年11月
高速点火実験における高ノイズ過酷環境下でのX線並びに中性子計測 (小特集高速点火レーザー核融合実験の進展 : 過酷環境下での計測技術の発展から見えてきたもの)

中井光男, 有川安信, 古賀麻由子, 安部勇輝, 長井隆浩, 前川修, 藤岡慎介, 白神宏之, 疇地宏

プラズマ・核融合学会誌 90 ( 11 ) 659 - 664 2014年11月
28aAT-4 ダイヤモンドアブレーターによる初期インプリントの抑制効果(28aAT 核融合プラズマ(慣性核融合,高速点火,高エネルギー密度物理),領域2(プラズマ))

加藤弘樹, 重森啓介, 弘中陽一郎, 寺崎英紀, 境家達弘, 細木亮太, 中井光男, 疇地宏

日本物理学会講演概要集 69 ( 1 ) 252 - 252 2014年3月
28pAT-5 高速点火実験における高速電子およびイオンスペクトル計測(28pAT 核融合プラズマ(慣性核融合,高速点火,高エネルギー密度物理),領域2(プラズマ))

尾崎哲, 小島完興, 有川安信, 白神宏, 藤岡慎介, 坂上仁志, Zhang Zhe, 池之内孝仁, 多賀正樹, 坂田匠平, Morace Alesio, 長井隆浩, 安部勇輝, 石原和大, 井上裕晶, 服部祥治, Lee Seung Ho, 細田達矢, 宇津木卓, 長友英夫, 砂原淳, 中井光男, 城崎知至

日本物理学会講演概要集 69 ( 1 ) 260 - 260 2014年3月
28pAT-9 Plasma Mirror experiment on LFEX laser facility

Morace A., Arikawa Y., Sunahara A., Kojima S., Fujioka S., Nakai M., Shiraga H., Nishimura H., Tokita S., Kawanaka J., Jitsuno H., Miyanaga N., Nakata Y., LFEX-group, Azechi H., Sagisaka A., Ogura K., Yogo A., Nishikino M., Kawachi T., Pirozhkov A. S., Nishiuchi M., Kando M., Kondo K.

日本物理学会講演概要集 69 ( 1 ) 261 - 261 2014年3月
28pAT-7 高速点火基礎実験における高エネルギーX線分光計測(28pAT 核融合プラズマ(慣性核融合,高速点火,高エネルギー密度物理),領域2(プラズマ))

坂田匠平, 有川安信, 小島完興, 池之内孝仁, 長井隆浩, 安部勇輝, 井上裕晶, 宇津木卓, 藤岡慎介, 石原裕大, 細田達也, 加藤龍好, 尾崎哲, 中井光男, 白神宏之, LFEX及びGEKKO-XII班, 疇地宏

日本物理学会講演概要集 69 ( 1 ) 261 - 261 2014年3月
28pAT-6 高速点火核融合実験における加熱効率の測定(28pAT 核融合プラズマ(慣性核融合,高速点火,高エネルギー密度物理),領域2(プラズマ))

有川安信, 藤岡慎介, 長井隆弘, 安部勇輝, Zhang Zhe, 小島完興, 池ノ内孝仁, 坂田匠平, 井上裕晶, 益田洋平, Morace Alessio, 野添宏器, 宇津木卓, 多賀正樹, Lee Seung Ho, 石原和大, 細田達矢, 中井光男, 白神宏之, 砂原淳, 城崎知至, 坂上仁志, 尾崎哲, FIRE-X group, 疇地宏

日本物理学会講演概要集 69 ( 1 ) 260 - 260 2014年3月
高速点火レーザー核融合における加熱基礎実験の成果のまとめ

藤岡慎介, 有川安信, ZHANG Zhe, MORACE Allesio, 長井隆浩, 安部勇輝, 石原和大, 小島完興, 坂田匠平, 多賀正樹, 池之内孝仁, 井上裕晶, 宇津木卓, 細田達矢, 服部祥治, LEE Seung Ho, 砂原淳, 城崎知至, 坂上仁志, 尾崎哲, 三間圀興, 田口俊弘, 弘中陽一郎, 山ノ井航平, 乗松孝好, 藤本靖, 時田茂樹, 重森啓介, 中田芳樹, 河仲準二, 実野孝久, 宮永憲明, 中井光男, 西村博明, 白神宏之, あぜ地宏

日本物理学会講演概要集 69 ( 1 ) 259 - 259 2014年3月
レーザー核融合高速点火重水素クライオターゲット製造実験のための装置開発

岩野圭介, 岩佐祐希, 山ノ井航平, 森田太智, 有川安信, 岩本晃史, 長友英夫, 中井光男, 乗松孝好, 疇地宏

核融合エネルギー連合講演会予稿集 10th (CD-ROM) ROMBUNNO.19-049 2014年
高速点火実験と高強度硬X線過酷環境

白神宏之, 有川安信, 古賀麻由子, 中井光男, 尾崎哲, 藤岡慎介, 西村博明, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 10th 2014年
高速点火基礎プラットフォームを用いた高速電子へのエネルギー変換効率計測

小島完興, 有川安信, 池之内孝仁, 藤岡慎介, MORACE A., 長井隆浩, 安部勇輝, 坂田匠平, 井上裕晶, 中井光男, 西村靖彦, 戸川博美, 浅川誠, 尾崎哲, 加藤龍好, あぜ地宏

日本物理学会講演概要集 69 ( 1 ) 2014年
高速点火レーザー核融合実験における液体シンチレータを用いたカレントモード中性子計測器の開発

長井隆浩, 益田洋平, 井上裕晶, 宇津木卓, 安部勇輝, 小島完興, 坂田匠平, 有川安信, 猿倉信彦, 中井光男, 藤岡慎介, 白神宏之, 乗松孝好, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 10th ROMBUNNO.19-044 2014年
単結晶CVDダイヤモンド検出器の高速点火方式慣性核融合における中性子燃焼履歴モニタ応用の試み

嶋岡毅紘, 金子純一, 有川安信, 磯部光孝, 坪田雅功, 長井隆浩, 小島完興, 安部勇輝, 坂田匠平, 藤岡慎介, 中井光男, 白神宏之, 畦地宏, 茶谷原昭義, 梅澤仁, 鹿田真一

応用物理学会秋季学術講演会講演予稿集(CD-ROM) 75th 2014年
光核反応を用いたレーザー駆動高輝度中性子源開発

宇津木卓, 有川安信, 小島完興, 池之内孝仁, 戸崎翔太, 余語覚文, MORCE Alessio, 井上峻介, 寺本研介, 中島裕人, 橋田昌樹, 阪部周二, 大竹淑恵, 三間圀興, 藤岡慎介, 中井光男, 西村博明, 疇地宏

プラズマ・核融合学会年会(Web) 31st 2014年
高速点火核融合におけるレーザー生成高速電子へのエネルギー変換効率計測

小島完興, 有川安信, 池之内孝仁, 藤岡慎介, MORACE A., 長井隆浩, 安部勇輝, 坂田匠平, 井上裕晶, 中井光男, 西村博明, 白神宏之, 西村靖彦, 戸川博美, 尾崎哲, 加藤龍好, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 10th 2014年
レーザー核融合用ターゲット開発のための固体水素屈折率測定

岩本晃史, 坂上仁志, 藤村猛, 乗松孝好, 中井光男, 白神宏之, 疇地宏

低温工学・超電導学会講演概要集 88th 226 2013年12月
26pKB-10 (γ, n)反応を用いた高エネルギーX線スペクトロメーターの改良(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

坂田匠平, 有川安信, 長井隆浩, 宇津木卓, 小島完興, 安部勇輝, 井上裕晶, 加藤龍好, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 68 ( 2 ) 188 - 188 2013年8月
26pKB-2 ダイヤモンドアブレーターによる初期インプリントの抑制効果(核融合プラズマ(慣性核融合,高速点火),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

加藤弘樹, 重森啓介, 弘中陽一郎, 中井光男, 疇地宏, 寺崎英紀, 境家達弘, 細木亮太

日本物理学会講演概要集 68 ( 2 ) 186 - 186 2013年8月
26pKB-14 赤外線加熱法による積分球を用いた高速点火重水素クライオターゲット製造技術の検証(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

岩野圭介, 岩佐祐希, 有川安信, 岩本晃史, 長友英夫, 中井光男, 乗松孝好, 疇地宏, ターゲットグループ

日本物理学会講演概要集 68 ( 2 ) 189 - 189 2013年8月
26pKB-11 高速点火プラズマからの高エネルギー放射光測定(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

小島完興, 中井光男, 有川安信, 長井隆浩, 安部勇輝, 坂田匠平, 波元拓哉, 池之内孝仁, 尾崎哲, 疇地宏

日本物理学会講演概要集 68 ( 2 ) 189 - 189 2013年8月
散乱中性子計測法による高密度爆縮実験

有川安信, 長井隆浩, 安部勇輝, 岩佐祐希, 小島完興, 坂田匠平, 井上裕晶, 宇津木卓, 益田洋平, 村田貴広, 藤岡慎介, 猿倉信彦, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 68 ( 2 ) 189 2013年8月
高速点火核融合プラズマからの高エネルギーX線画像計測および再構成法

井上裕晶, 有川安信, 野崎真也, 藤岡慎介, 長井隆浩, 安部勇輝, 小島完興, 坂田匠平, 宇津木卓, 益田洋平, 金城篤史, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 68 ( 2 ) 188 - 188 2013年8月
27pEF-3 ダイヤモンドアブレータによる流体不安定性の抑制(27pEF 核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

重森啓介, 中井光男, 藤岡慎介, 弘中陽一郎, 砂原淳, 境家達弘, 清水克哉

日本物理学会講演概要集 68 ( 1 ) 288 - 288 2013年3月
25aKB-1 真空揺らぎによる放射の反作用の安定化モデル(プラズマ基礎・プラズマ科学(非線形現象・数値解析),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

瀬戸慧大, 張森, 甲賀ジェームス, 長友英夫, 中井光男, 三間國興

日本物理学会講演概要集 68 ( 0 ) 173 - 173 2013年
26pKB-12 高速点火レーザー核融合実験におけるイオン温度測定用液体シンチレータ中性子計測器の開発(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

長井隆浩, 中井光男, 藤岡慎介, 白神宏之, 乗松孝好, FIREXグループ, 疇地宏, 益田洋平, 井上裕晶, 宇津木卓, 安部勇輝, 小島完興, 坂田匠平, 有川安信, 猿倉信彦

日本物理学会講演概要集 68 ( 0 ) 189 - 189 2013年
26pKB-9 多チヤンネルnTOFスペクトロメーターを用いた高速点火核融合実験におけるイオン温度計測(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

安部勇輝, 白神宏之, 乗松孝好, 中井光男, 疇地宏, FIREXグループ, 有川安信, 長井隆浩, 小島完興, 坂田匠平, 井上裕晶, 岩佐祐希, 岩野圭介, 藤岡慎介

日本物理学会講演概要集 68 ( 0 ) 188 - 188 2013年
26pKB-13 散乱中性子計測法による高密度爆縮実験(核融合プラズマ(慣性核融合,高エネルギー密度物理,波動・加熱・不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

有川安信, 村田貴広, 藤岡慎介, 猿倉信彦, 中井光男, 白神宏之, 疇地宏, FIREXグループ, 長井隆浩, 安部勇輝, 岩佐祐希, 小島完興, 坂田匠平, 井上裕晶, 宇津木卓, 益田洋平

日本物理学会講演概要集 68 ( 0 ) 189 - 189 2013年
29pEB-6 高速点火核融合統合実験における加熱レーザーからコアへのエネルギー伝達効率測定(29pEB 核融合プラズマ(慣性核融合,高速点火),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

有川安信, 白神宏之, 疇地宏, およびFIREXグループ, 長井隆浩, 安部勇輝, 小島完興, 坂田匠平, 井上裕晶, 藤岡慎介, 猿倉信彦, 中井光男

日本物理学会講演概要集 68 ( 0 ) 309 - 309 2013年
レーザーとナノ粒子との相互作用による高エネルギーイオン発生

時田茂樹, 橋田昌樹, 乗松孝好, 中井光男, 阪部周二

大阪大学レーザーエネルギー学研究センター共同利用・共同研究成果報告書 2012 2013年
高速点火プラズマからの放射光測定による高速電子計測

小島完興, 有川安信, 池之内孝仁, 藤岡慎介, MORACE A., 長井隆浩, 安部勇輝, 坂田匠平, 井上裕晶, 中井光男, 西村靖彦, 戸川博美, 浅川誠, 尾崎哲, 加藤龍好, 疇地宏

プラズマ・核融合学会年会(Web) 30th 2013年
高速点火核融合実験における高エネルギーX線画像計測および再構成手法

井上裕晶, 有川安信, 野崎真也, 藤岡慎介, 長井隆浩, 安部勇輝, 小島完興, 坂田匠平, 宇津木卓, 益田洋平, 金城篤史, 中井光男, 白神宏之, 疇地宏

プラズマ・核融合学会年会(Web) 30th 2013年
ハイパワーレーザーで探る高エネルギー密度物質状態

尾崎典雅, GREGORI Gianluca, 真下茂, NELLIS William J, 木村友亮, 宮西宏併, 犬伏雄一, BENUZZI-MOUNAIX A, KOENIG M, 奥地拓生, 佐野孝好, 佐野智一, 清水克哉, 兒玉了祐

レーザー学会研究会報告 = Reports on the Topical meeting of the Laser Society of Japan 429 1 - 6 2012年8月
超高強度レーザー生成高エネルギー制動放射X線分光器開発

波元拓哉, 西村博明, 藤岡慎介, ZHANG Zhe, 中井光男, 古賀麻由子, 白神宏之, 有川安信, 小島完興, 疇地宏, 尾崎哲, CHEN H, PARK J, WILLIAMS J, BATANI Dimitri, SANTOS Joao, VAISSEAU Xavier, NICOLAI Philippe, MORACE Alessio, VELTCHEVA Mina Ivanova

レーザー学会研究会報告 = Reports on the Topical meeting of the Laser Society of Japan 429 23 - 27 2012年8月
20pFC-5 高速点火核融合実験に用いるコンプトン散乱を用いたγ線スペクトロメーターの開発(20pFC 核融合プラズマ(慣性核融合プラズマ(計測・高強度レーザー生成プラズマ)),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

小島完興, 中井光男, 有川安信, 長井隆浩, 安部勇輝, 坂田匠平, 西村博明, 波元拓哉, 尾崎哲, 加藤龍好, 疇地宏

日本物理学会講演概要集 67 ( 2 ) 217 - 217 2012年8月
高速点火核融合実験用多チャンネル液体シンチレーション中性子検出器の開発

安部勇輝, 細田裕計, 有川安信, 長井隆浩, 小島完興, 酒井浩平, 山ノ井航平, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏

日本物理学会講演概要集 67 ( 2 ) 216 - 216 2012年8月
高速点火核融合統合実験における中性子計測技術の進展

有川安信, 長井隆浩, 安部勇輝, 小島完興, 坂田匠平, 井上裕晶, 藤岡慎介, 猿倉信彦, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 67 ( 2 ) 216 - 216 2012年8月
24aYC-3 高速点火核融合実験におけるコンプトン散乱を用いたγ線スペクトロメーターの開発(24aYC 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)

小島宗興, 中井光男, 細田裕計, 有川安信, 長井隆浩, 安部勇輝, 西村博明, 古賀麻由子, 波元拓哉, 尾崎哲, 加藤龍好, 疇地宏

日本物理学会講演概要集 67 ( 1 ) 246 - 246 2012年3月
高速点火実験用多チャンネル液体シンチレーション検出器の開発

安部勇輝, 細田裕計, 有川安信, 長井隆浩, 小島完興, 酒井浩平, 山ノ井航平, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏

日本物理学会講演概要集 67 ( 1 ) 246 - 246 2012年3月
希土類ドープAPLFガラスシンチレータの発光特性測定による,ガラス中ドーパントの電子状態の研究

坪井瑞輝, 河野雅弘, 武田耕平, 中里智治, 清水俊彦, CADATAL‐RADUBAN M, 山ノ井航平, 酒井航平, 西亮介, 南佑輝, 有川安信, 猿倉信彦, 乗松孝好, 中井光男, 疇地宏, 村田貴広, 藤野茂, 吉田英樹, 須山敏尚, 福田健太郎, 吉川彰, 佐藤仲弘, 菅博文, 鎌田圭

応用物理学関係連合講演会講演予稿集(CD-ROM) 59th ROMBUNNO.17P-C4-8 2012年2月
19aFJ-4 超相対論レーザー電子相互作用ののもとでの量子効果を組み込んだ放射の反作用モデル(19aFJ プラズマ基礎(高エネルギー密度,レーザープラズマ),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

瀬戸慧大, 甲賀ジェームス, 長友英夫, 三間圀興, Nakai Mitsuo, Azechi Hiroshi

日本物理学会講演概要集 67 ( 0 ) 200 - 200 2012年
20pFC-6 (γ,n)反応を用いた高エネルギーγ線スペクトロメーターの開発(20pFC 核融合プラズマ(慣性核融合プラズマ(計測・高強度レーザー生成プラズマ)),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

坂田匠平, 小島完興, 有川安信, 長井隆浩, 安部勇輝, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 67 ( 0 ) 217 - 217 2012年
24aYC-6 レーザー爆縮プラズマを用いた極高圧力の発生(24aYC 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)

重森啓介, 疇地宏, 清水克哉, 長友英夫, 城崎知至, 砂原淳, 弘中陽一郎, 門野敏彦, 藤岡慎介, 白神宏之, 中井光男

日本物理学会講演概要集 67 ( 0 ) 246 - 246 2012年
27aYE-6 超相対論レーザー電子相互作用の下における放射の反作用モデル(27aYE 領域2・ビーム物理領域合同(高エネルギー密度物理・超高強度レーザー・レーザープラズマ加速),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

瀬戸慧大, 長友英夫, 甲賀ジェームス, 三間圀興, 中井光男, 畦地宏

日本物理学会講演概要集 67 ( 0 ) 284 - 284 2012年
超高強度レーザー生成プラズマ相互作用におけるエネルギー輸送観測用高エネルギーX線分光器

波元拓哉, 西村博明, 藤岡慎介, ZHANG Zhe, 中井光男, 古賀麻由子, 白神宏之, 有川安信, 小島完興, 疇地宏, 尾崎哲, CHEN H., PARK J., WILLIAMS J., BATANI Dimitri, SANTOS Joao, VAISSEAU Xavier, NICOLAI Philippe, MORACE Alessio, VELTCHEVA Mina Ivanova

プラズマ・核融合学会年会(Web) 29th 2012年
高速点火レーザー核融合実験用のγ線由来バックグラウンドノイズを低減した中性子計測器の開発

長井隆浩, 中井光男, 有川安信, 細田裕計, 安部勇輝, 小島完興, 乗松孝好, 猿倉信彦, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 9th ROMBUNNO.28A-29P 2012年
高速点火核融合における放射X線分光観測

波元拓哉, 西村博明, 藤岡慎介, ZHANG Zhe, 中井光男, 古賀麻由子, 白神宏之, 有川安信, 小島完興, 疇地宏, 尾崎哲, CHEN H., PARK J., WILLIAMS J., BATANI Dimitri, SANTOS Joao, VAISSEAU Xavier, NICOLAI Philippe, MORACE Alessio, VELTCHEVA Mina Ivanova

核融合エネルギー連合講演会(CD-ROM) 9th 2012年
高速点火核融合統合実験における中性子計測

有川安信, 細田裕計, 長井隆浩, 藤岡慎介, 猿倉信彦, 中井光男, 白神宏之, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 9th ROMBUNNO.28A-28P 2012年
高速点火核融合実験用多チャンネル液体シンチレーション中性子検出器の開発

安部勇輝, 細田裕計, 有川安信, 長井隆浩, 小島完興, 酒井浩平, 山ノ井航平, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 9th ROMBUNNO.29A-43P 2012年
レーザー核融合散乱中性子計測のためのガラスシンチレーター開発

山ノ井航平, 有川安信, 長井隆弘, 渡辺梢, 河野雅弘, 酒井浩平, 中里智治, 清水俊彦, CADATAL‐RADUBAN Marilou, 猿倉信彦, 中井光男, 乗松孝好, 西村博明, 疇地宏, 村田貴広, 藤野茂, 吉田英樹, 泉信彦, 福田健太郎, 須山敏尚, 佐藤仲弘, 菅博文

高速度イメージングとフォトニクスに関する総合シンポジウム論文集 2011 74 - 75 2011年12月
散乱中性子計測用ガラスシンチレーター材料の開発

村田貴広, 藤野茂, 吉田英樹, 有川安信, 中里智治, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 鎌田圭, 薄善行, 須山敏尚, 吉川彰, 佐藤仲弘, 菅博文

レーザー研究 39 ( 5 ) 312 - 318 2011年5月
ポリスチレン系慣性核融合ターゲット材料の二光子吸収係数計測と臭素化率の検討

南佑輝, 渡辺梢, 山ノ井航平, 有川安信, 兼安祐実, 鈴木由美子, 町真次, CADATAL‐RADUBAN Marilou, 清水俊彦, 本間啓史, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏

応用物理学関係連合講演会講演予稿集(CD-ROM) 58th ROMBUNNO.27P-BW-2 2011年3月
25aGY-5 爆縮燃料面密度計測のための多チャンネルシンチレーター散乱中性子計測器の開発(25aGY 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

有川安信, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 泉信彦, 吉田英樹, 村田貴広, 藤野茂, 吉川彰, 佐藤仲弘, 山ノ井航平, 菅博文, 渡辺梢, 長井隆浩, 中村浩隆, 渡利威士, 細田裕計, Raduban Marilou Cadatal, 清水俊彦

日本物理学会講演概要集 66 ( 0 ) 234 - 234 2011年
25aGY-6 高速点火レーザー核融合の中性子発生量測定のための高速減衰低残光液体シンチレータ中性子計測器の開発(25aGY 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

長井隆浩, 藤岡慎介, 村田勲, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 南佑輝, 渡辺梢, 山ノ井航平, 有川安信, 細田裕計, 中村浩隆, 渡利威士, 清水俊彦

日本物理学会講演概要集 66 ( 0 ) 235 - 235 2011年
レーザー核融合高速点火方式用クライオターゲットの開発―ターゲット冷却時の機械的な課題―

岩本晃史, 坂上仁志, 藤村猛, 中井光男, 乗松孝好, 砂原淳

低温工学・超電導学会講演概要集 83rd 58 2010年12月
レーザー衝撃圧縮を用いた液体水素のオフユゴニオ計測

佐野孝好, 尾崎典雅, 境家達弘, 重森啓介, 生駒大洋, 木村友亮, 宮西宏併, 遠藤恭, 城下明之, 高橋英樹, 實井辰也, 曽田智史, 堀安範, 弘中陽一郎, 岩本晃史, 門野敏彦, 中井光男, 奥地拓生, 清水克哉, 近藤忠, 兒玉了祐, 三間圀興

高圧討論会講演集 51 264 - 264 2010年10月
高圧発生・観測装置としての高出力レーザー : テラワットからペタワット, そしてエクサワットへ

重森啓介, 河仲準二, 中田芳樹, 藤本靖, 藤岡慎介, 佐野孝好, 長友英夫, 實野孝久, 弘中陽一郎, 中井光男, 坂和洋一, 椿本孝治, 門野敏彦, 宮永憲明, 村上匡且, 白神宏之, 古賀麻由子, 藤田尚徳, 疇地宏, LFEX建設チーム

高圧討論会講演集 51 54 - 54 2010年10月
311 レーザー衝撃圧縮による高圧水素のオフユゴニオ計測と巨大ガス惑星の内部構造(オーラルセッション8 ガス惑星・リング・原始惑星系円盤)

佐野孝好, 尾崎典雅, 境家達弘, 重森啓介, 生駒大洋, 木村友亮, 宮西宏併, 遠藤恭, 城下明之, 高橋英樹, 實井辰也, 曽田智史, 堀安範, 弘中陽一郎, 岩本晃史, 門野敏彦, 中井光男, 奥地拓生, 清水克哉, 近藤忠, 兒玉了祐, 三間圀興

日本惑星科学会秋期講演会予稿集 2010 62 - 62 2010年10月
ポリスチレン系慣性核融合ターゲット材料の二光子吸収係数評価

渡辺梢, 南佑輝, 山ノ井航平, 有川安信, 兼安祐実, 鈴木由美子, RADUBAN Marilou Cadatal, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏

応用物理学会学術講演会講演予稿集(CD-ROM) 71st ROMBUNNO.17P-L-2 2010年8月
レーザー核融合散乱中性子計測のための高速応答6Liガラスシンチレーター

有川安信, 山ノ井航平, 長井隆弘, 渡辺梢, 河野雅弘, 酒井浩平, 中里智治, 清水俊彦, RADUBAN Marilou Cadatal, ESTACIO Elmer Surat, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 村田貴広, 藤野茂, 吉田英樹, 泉信彦, 佐藤仲弘, 菅博文

応用物理学会学術講演会講演予稿集(CD-ROM) 71st ROMBUNNO.16A-L-5 2010年8月
レーザー核融合高速点火方式用クライオターゲットの開発―新概念による燃料層形成実証試験―

岩本晃史, 坂上仁志, 三戸利行, 藤村猛, 中井光男, 乗松孝好, 長井圭治

低温工学・超電導学会講演概要集 82nd 52 2010年5月
20pTE-2 衝撃点火方式実証へ向けた核融合反応中性子生成実験(20pTE 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

渡利威士, 弘中陽一郎, 中井光男, 村上匡且, 中村浩隆, 細田裕計, 有川安信, 本間啓史, 乗松孝好, Karasik Max, Bates Jason, Obenschain Steve, 疇地宏

日本物理学会講演概要集 65 ( 1 ) 228 - 228 2010年3月
高速点火実験用高速減衰中性子シンチレーション計測器の開発

長井隆浩, 渡利威士, 中村浩隆, 細田裕計, 有川安信, 中井光男, 乗松孝好, 猿倉信彦, 本間啓治, 疇地宏

日本物理学会講演概要集 65 ( 1 ) 244 - 244 2010年3月
高速点火核融合実験用散乱中性子計測器の開発

有川安信, 山ノ井航平, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 泉信彦, 村田貴広, 藤野茂, 吉田英樹, 鎌田圭, 薄善行, 須山敏尚, 深堀明博, 吉川彰, 清原元輔, 菅博文

日本物理学会講演概要集 65 ( 1 ) 244 - 244 2010年3月
20pTE-7 LFEXレーザーによる爆縮プラズマ高速加熱における加熱効率(20pTE 核融合プラズマ(慣性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

中村浩隆, 大平真司, 木田健児, 古賀麻由子, 坂和洋一, 嶋田和浩, 白神宏之, 日野慎太郎, 藤岡慎介, 疇地宏, 中井光男, 渡利威士, 細田裕計, 有川安信, 城崎知至, 長井隆浩, 岩脇智行, 植田達

日本物理学会講演概要集 65 ( 0 ) 229 - 229 2010年
LFEXレーザーによる爆縮プラズマ高速加熱における加熱効率

中村浩隆, 中井光男, 渡利威士, 細田裕計, 有川安信, 城崎知至, 長井隆浩, 岩脇智行, 植田達, 大平真司, 木田健児, 古賀麻由子, 坂和洋一, 嶋田和浩, 白神宏之, 日野慎太郎, 藤岡慎介, 疇地宏

日本物理学会講演概要集 65 ( 1 ) 2010年
LFEXレーザーを用いたレーザー核融合高速点火実験におけるプラズマ加熱効率

中村浩隆, 中井光男, 渡利威士, 細田裕計, 有川安信, 長井隆浩, 岩脇智行, 岩脇智行, 植田達, 大平真司, 木田健児, 木田健児, 古賀麻由子, 坂和洋一, 嶋田和浩, 嶋田和浩, 白神宏之, 田中和夫, 田中和夫, 羽原英明, 羽原英明, 日野慎太郎, 日野慎太郎, 藤岡慎介, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 8th 2010年
レーザー核融合散乱中性子イメージング計測器の開発

有川安信, 山ノ井航平, 長井隆浩, 乗松孝好, 猿倉信彦, 白神宏之, 中井光男, 疇地宏, 村田貴広, 藤野茂, 吉川彰, 薄善行, 泉信彦, 菅博文

核融合エネルギー連合講演会(CD-ROM) 8th ROMBUNNO.11B-04P 2010年
散乱中性子検出用ガラスシンチレーターの開発

村田貴広, 藤野茂, 吉田英樹, 有川安信, 中里智治, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 鎌田圭, 薄善行, 須山敏尚, 吉川彰, 佐藤仲弘, 菅博文

資源・素材 2010 ( 2 ) 7 - 8 2010年
高速点火核融合実験用高速減衰中性子シンチレーション計測器の開発

長井隆浩, 山ノ井航平, 有川安信, 中井光男, 猿倉信彦, 乗松孝好, 疇地宏

核融合エネルギー連合講演会(CD-ROM) 8th ROMBUNNO.11B-03P 2010年
レーザー核融合用低密度フォーム内における固体水素の充填状況の測定

藤村猛, 中井光男, 乗松孝好, 本間啓史, ヤンハン, 疇地宏, 岩本晃史, 坂上仁志, 三戸利行

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 81 154 - 154 2009年11月
慣性核融合燃料面密度計測のための散乱中性子検出用Pr3+ドープガラスシンチレーターの開発

村田貴広, 藤野茂, 吉田英樹, 有川安信, 中里智治, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 疇地宏, 鎌田圭, 薄善行, 須山敏尚, 吉川彰, 佐藤仲弘, 菅博文

ガラスおよびフォトニクス材料討論会講演要旨集 50th 145 - 146 2009年10月
27aYL-1 塩素化合ガス封入シェルターゲットを用いた爆縮コアプラズマの電子温度診断(核融合プラズマ(慣性)(高速点火),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)

田辺稔, 藤原隆史, 藤岡慎介, 林伸夫, 西村博明, 藤村猛, 中井光男, 白神宏之, 疇地宏

日本物理学会講演概要集 64 ( 2 ) 133 - 133 2009年8月
27pYL-8 レーザー核融合燃料面密度計測のための高速応答リチウム6シンチレーター(核融合プラズマ(慣性)(輸送/不安定性/他),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)

有川安信, 中里知治, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 村田貴広, 藤野茂, 吉田英樹, 鎌田圭, 遠藤貴範, 薄善行, 須山敏尚, 吉川彰, 佐藤仲弘, 菅博文, 疇地宏

日本物理学会講演概要集 64 ( 2 ) 138 - 138 2009年8月
27aYL-2 高速点火用コーン付きシェルターゲットの爆縮対称性向上(核融合プラズマ(慣性)(高速点火),領域2,プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理)

白神宏之, 古賀麻由子, 崔銀珠, 尾崎哲, 藤岡慎介, 中井光男, 本間啓史, 永井圭治, 乗松孝好, 長友英夫, 城崎知至, 三間國興, 疇地宏

日本物理学会講演概要集 64 ( 2 ) 133 - 133 2009年8月
衝撃点火核融合の原理実証

村上匡且, 弘中陽一郎, 畦地宏, 境家達弘, 白神宏之, 重森啓介, 藤岡慎介, 中井光男, 猿倉信彦, 藤田尚徳, 長友英夫, 門野敏彦, OBENSCHAIN S.P, KARASIK M, BATES J.W, AGLITSKIY Y

大阪大学レーザーエネルギー学研究センター共同利用・共同研究成果報告書 2008 37 - 38 2009年3月
超短パルスレーザー照射によって発生するSiの超高速融解過程の観察

井澤友策, 藤田雅之, 中井光男, 乗松孝好, 井澤靖和

電気学会研究会資料. OQD, 光・量子デバイス研究会 2009 ( 32 ) 31 - 36 2009年3月
27aYL-7 コーン付きシェルターゲットの爆縮加熱ダイナミクス計測(27aYL 慣性核融合(高速点火・実験・計測),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

白神宏之, Zhong J., 古賀麻由子, 尾崎哲, 寶田圭司, 中井光男, 疇地宏, 長井圭治, 乗松孝好, 長友英夫, 城崎知至, 三間圀興

日本物理学会講演概要集 64 ( 1 ) 197 - 197 2009年3月
30pSP-3 レーザー衝撃圧縮による水素の状態方程式計測と木星の内部構造への応用(30pSP プラズマ宇宙物理(観測,計測,新技術),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

佐野孝好, 生駒大洋, 重森啓介, 尾崎典雅, 境家達弘, 中井光男, 門野敏彦, 弘中陽一郎, 大谷一人, 城下明之, 兒玉了祐, 木村友晃, 宮西宏併, 遠藤恭, 近藤忠, 高橋英樹, 清水克哉, 岩本晃史, 奥地拓生, 堀安範

日本物理学会講演概要集 64 ( 1 ) 253 - 253 2009年3月
爆縮燃料面密度計測のための散乱中性子検出器の開発

有川安信, 村田貴広, 藤野茂, 吉田英樹, 中里智治, 清水俊彦, 山ノ井航平, 鷹取慧, 中井光男, 乗松孝好, 猿倉信彦, 清原元輔, 管博文, 疇地宏

日本物理学会講演概要集 64 ( 1 ) 198 2009年3月
27pYL-11 高強度レーザー生成プラズマを用いた数100GPaまでの等エントロピー圧縮法の開発と状態方程式研究への応用(27pYL プラズマ科学(高エネルギー密度プラズマ),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

宮西宏併, Vinci T, 佐野智一, 木村友亮, 遠藤恭, 實井辰也, Collins G, Eggert J, 坂和洋一, 重森啓介, 児玉了祐, 尾崎典雅, Smith R, Brambrink E, Benuzzi-Mounaix A, Ravasio A, Diziere A, Wei H, Koenig M

日本物理学会講演概要集 64 ( 0 ) 212 - 212 2009年
レーザー核融合高速点火方式用クライオターゲットの開発 : ターゲット組立て後の常温気密性試験装置の開発

藤村猛, 中井光男, 長井圭治, 本間啓史, 田邉賢一, 乗松孝好, 岩本晃史, 坂上仁志, 三戸利行

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 79 215 - 215 2008年11月
レーザー核融合高速点火方式用クライオターゲットの開発 : 固体水素燃料充填予備試験

岩本晃史, 前川龍司, 坂上仁志, 三戸利行, 藤村猛, 中井光男, 長井圭治, 乗松孝好, 疇地宏

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 79 216 - 216 2008年11月
Thin shell aerogel fabrication for FIREX-I targets using high viscosity (phloroglucinol carboxylic acid)/formaldehyde solution

H. Yang, K. Nagai, M. Nakai, T. Norimatsu

Laser and Particle Beams 26 ( 3 ) 449 - 453 2008年9月
中性子計測のためのプラスチックシンチレーター(BC‐422,BC‐422Q)の特性評価

有川安信, 中井光男, 渡利威士, 細田裕計, 古川裕介, 猿倉信彦, 長井圭治, 乗松孝好, 疇地宏

核融合エネルギー連合講演会予稿集 7th 66 2008年5月
新しい高速点火方式の探索

疇地宏, 境家達弘, 白神宏之, 重森啓介, 古賀麻由子, 中井光男, 猿倉信彦, 長友英夫, 三間圀興, 村上匡且, ELIEZER Shalom, NORREYS P

大阪大学レーザーエネルギー学研究センター共同研究成果報告書 2007 35 - 36 2008年3月
衝撃点火核融合の原理実証

畦地宏, 村上匡且, 境家達弘, 白神宏之, 重森啓介, 藤岡慎介, 中井光男, 猿倉信彦, 藤田尚徳, 長友英夫, 砂原淳, OBENSCHAIN S.P, KARASIK M, GARDNER J.H, AGLITSKIY Y

大阪大学レーザーエネルギー学研究センター共同研究成果報告書 2007 37 2008年3月
20pZH-3 高強度レーザー光を用いた高圧凝縮物性研究 : ショックユゴニオ計測とオフユゴニオへの展開(20pZH プラズマ科学(レーザー生成プラズマ),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

尾崎典雅, Smith R, Nazarov W, 真下茂, 木下貴博, 田辺稔, Vinci T, Collins G, Eggert J, 藤岡真介, 弘中陽一郎, 佐野孝好, 堀安範, 生駒大洋, 岩本晃史, 門野敏彦, 中井光男, 乗松孝好, 大谷和人, 境家達弘, 坂和洋一, 関根利守, 木村友亮, 重森啓介, 清水克哉, 城下明之, 高橋英樹, 兒玉了祐, 宮西宏併, 遠藤恭, 佐野智一, 寺井智之, 奥地拓生, Koenig M

日本物理学会講演概要集 63 ( 0 ) 158 - 158 2008年
20pZH-4 高強度レーザー生成プラズマを用いた等エントロピー圧縮実験(20pZH プラズマ科学(レーザー生成プラズマ),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

宮西宏併, Eggert John, 関根利守, 重森啓介, 児玉了祐, 尾崎典雅, Smith Raymond, Koenig M, Vinci Tomazo, 佐野智一, 木村友亮, 遠藤恭, Collins Gilbert

日本物理学会講演概要集 63 ( 0 ) 159 - 159 2008年
ターゲットインジェクター基盤技術の開発

吉田弘樹, 中井貞雄, 遠藤琢磨, 辻龍介, 乗松孝好, 実野孝久, 中井光男, 長井圭治, 田中良太, 丹羽祐介

大阪大学レーザーエネルギー学研究センター共同研究成果報告書 2007 2008年
可視化法を用いた極低温熱流動現象の研究レーザー核融合高速点火実証実験用クライオターゲットの開発―燃料充填状況の可視化技術―:—燃料充填状況の可視化技術—

藤村猛, 中井光男, 岩本晃史, 乗松孝好, 長井圭治, 本間啓史, ヤンハン, 坂上仁志, 三間圀興

低温工学 43 ( 3 ) 109 - 113 2008年
23pRS-11 高速点火実験用高速応答中性子シンチレーション検出器の開発(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)

有川安信, 中井光男, 渡利威士, 細田裕計, 古川裕介, 白神宏之, 畦地宏

日本物理学会講演概要集 62 ( 2 ) 240 - 240 2007年8月
23pRS-4 衝撃点火方式による中性子生成実験(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)

渡利威士, 躊地宏, 村上匡且, 中井光男, 白神宏之, 重森啓介, 門野敏彦, 藤岡慎介, 長友英夫, 仲佳勇, 武田和夫, 細田裕計, 有川安信, Karasik Max, TMSグループ, GODグループ, 三間圀興

日本物理学会講演概要集 62 ( 2 ) 238 - 238 2007年8月
23pRS-2 高速点火用コーン付きシェルターゲットの爆縮(核融合プラズマ(慣性閉じ込め),領域2,プラズマ基礎・プラズマ科学・核談合プラズマ・プラズマ宇宙物理)

白神宏之, 中井光男, 畦地宏, 重森啓介, Zhong Jiayong, 大谷一人, 渡利威士, 武田和夫, 細田裕計, 有川安信, 持山智浩, 田辺稔, 藤岡慎介, 西村博明, 坂和洋一, 小賀麻由子, 磯部光孝, 長友英夫, 砂原淳, 城崎知至, 中村龍史, 長井圭治, 乗松孝好, 岩本晃史, 三戸利行, 藤田尚徳, 猿倉信彦, 三間圀興

日本物理学会講演概要集 62 ( 2 ) 238 - 238 2007年8月
衝撃点火核融合のための超高速飛翔体の生成

境家達弘, 斉藤寛, 疇地宏, 大谷一人, 武田和夫, 一之瀬大吾, 村上匡且, 藤岡慎介, 重森啓介, 中井光男, 白神宏之, 長友英夫, 砂原淳, 三間圀興, KARASIK Max, GARDNER John, OBENSCHAIN Stephen

プラズマ・核融合学会誌 = Journal of plasma and fusion research 83 ( 7 ) 636 - 640 2007年7月
FIREX計画用クライオターゲットの開発 : ダミーフォームターゲットの冷却試験

岩本晃史, 前川龍司, 三戸利行, 坂上仁志, 本島修, 藤村猛, 中井光男, 長井圭治, 乗松孝好, 疇地宏, 三間圀興

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 76 114 - 114 2007年5月
FIREX計画用クライオターゲットの開発 : 固体燃料層の評価

藤村猛, 中井光男, 乗松孝好, 長井圭治, ヤンハン, 三間圀興, 岩本晃史, 三戸利行, 坂上仁志, 本島修

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 76 115 - 115 2007年5月
20aQC-5 クライオ重水素高速点火ターゲットの爆縮加熱統合実験(核融合プラズマ(慣性閉じ込め),領域2,原子・分子,量子エレクトロニクス,放射線物理)

白神宏之, 中井光男, 疇地宏, 重森啓介, 境家達弘, Zhong Jiayong, 大谷一人, 渡利威士, 李明篤, 武田和夫, 齋藤寛, 細田裕計, 有川安信, 田辺稔, 犬伏雄一, 藤岡慎也, 西村博明, 坂和洋一, 小賀麻由子, 磯部光孝, 長友英夫, 砂原淳, 城崎知至, 中村龍史, 長井圭治, 乗松孝好, 岩本晃史, 三戸利行, 藤田尚徳, 猿倉信彦, 三間圀興

日本物理学会講演概要集 62 ( 1 ) 213 - 213 2007年2月
20aQC-6 衝撃点火による燃焼プラズマの加熱実験(核融合プラズマ(慣性閉じ込め),領域2,原子・分子,量子エレクトロニクス,放射線物理)

渡利威士, 境家達弘, 中井光男, 疇地宏, 白神宏之, 重森啓介, 村上匡且, 細田裕計, 斉藤寛, 有川安信, 三間圀興

日本物理学会講演概要集 62 ( 1 ) 214 - 214 2007年2月
20pQC-1 爆縮燃料プラズマの2次反応計測 : 部分縮退プラズマ中の飛程の伸張(核融合プラズマ(燃焼プラズマ診断法),領域2,原子・分子,量子エレクトロニクス,放射線物理)

中井光男, 古河裕之, 細田裕計, 渡利威士, 城崎知至, 長友英夫, 畦地宏, 白神宏之, 重森啓介, 西原功修, 三間國興

日本物理学会講演概要集 62 ( 1 ) 220 - 220 2007年2月
20pQC-4 高速点火核融合実験におけるバブル検出器の適用(核融合プラズマ(燃焼プラズマ診断法),領域2,原子・分子,量子エレクトロニクス,放射線物理)

藤原隆史, 中井光男, 白神宏之, 前川修, 吉田國雄, 三間圀興

日本物理学会講演概要集 62 ( 1 ) 221 - 221 2007年2月
20pQC-3 高速応答中性子シンチレーション検出器の開発(核融合プラズマ(燃焼プラズマ診断法),領域2,原子・分子,量子エレクトロニクス,放射線物理)

有川安信, 中井光男, 渡利威士, 細田裕計, 藤原隆史, 乗松孝好, 畦地宏, 白神広之, 重森啓介, 坂和洋一

日本物理学会講演概要集 62 ( 1 ) 220 - 220 2007年2月
20pQC-2 TOF型多チャンネル中性子検出器の改良(核融合プラズマ(燃焼プラズマ診断法),領域2,原子・分子,量子エレクトロニクス,放射線物理)

細田裕計, 渡利威士, 有川安信, 中井光男, 泉信彦, 疇地宏, 三間國興

日本物理学会講演概要集 62 ( 1 ) 220 - 220 2007年2月
20pQC-10 クライオターゲットにおける先行加熱計測(核融合プラズマ(燃焼プラズマ診断法),領域2,原子・分子,量子エレクトロニクス,放射線物理)

大谷一人, 重森啓介, 一之瀬大吾, 砂原淳, 境家達弘, 中井光男, 疇地宏, 三間圀興

日本物理学会講演概要集 62 ( 1 ) 222 - 222 2007年2月
20aQC-4 衝撃点火核融合の原理実証実験(核融合プラズマ(慣性閉じ込め),領域2,原子・分子,量子エレクトロニクス,放射線物理)

境家達弘, 中井光男, 白神宏之, 長友英夫, 砂原淳, 躊地宏, 三間圀興, Karasik M, Gardner J, Obenschain S, PHI- PDT- TM, GOD-グループ, 斉藤寛, 大谷一人, 渡利威士, 一之瀬大吾, 細田裕計, 村上匡且, 藤岡慎介, 重森啓介

日本物理学会講演概要集 62 ( 0 ) 213 - 213 2007年
ターゲットインジェクション基盤技術開発

吉田弘樹, 乗松孝好, 中井光男, 長井圭治, 遠藤琢磨, 辻龍介

大阪大学レーザーエネルギー学研究センター共同研究成果報告書 2006 2007年
高速点火実験用高速応答中性子シンチレーション検出器の開発

有川安信, 中井光男, 渡利威士, 細田裕計, 武田和夫, 藤原隆史, 古川裕介, 乗松孝好, 白神宏之, 猿倉信彦, 疇地宏

プラズマ・核融合学会年会(Web) 24th ROMBUNNO.28aC09P (WEB ONLY) 2007年
28pB08 クライオ重水素ターゲットの高速点火統合実験(慣性)

白神宏之, 中井光男, 疇地宏, 境家達弘, 重森啓介, Zhang Jiayong, 大谷一人, 渡利威士, 李明篤, 武田和夫, 齋藤寛, 細田裕計, 有川安信, 田辺稔, 犬伏雄一, 藤岡慎介, 西村博明, 坂和洋一, 磯部光孝, 長友英夫, 砂原淳, 城崎知至, 中村龍史, 長井圭治, 乗松孝好, 岩本晃史, 三戸利行, 三間圀興

プラズマ・核融合学会年会予稿集 ( 23 ) 92 - 92 2006年11月
30pA25P レーザー照射フォームクライオターゲットにおける先行加熱(ヘリカルI、慣性)

大谷一人, 重森啓介, 一之瀬大吾, 塩田剛士, 砂原淳, 中井光男, 白神宏之, 疇地宏, 三間圀興

プラズマ・核融合学会年会予稿集 ( 23 ) 186 - 186 2006年11月
30pA33P 衝撃点火核融合のための超高速流体の生成と衝突実験(ヘリカルI、慣性)

斎藤寛, 境家達弘, 疇地宏, 村上匡且, 渡利威士, 大谷一人, 白神宏之, 中井光男, 重森啓介, 藤岡慎介, 長友英夫, 砂原淳, 三間圀興, PHI, PDT-, TM, GOD-グループ, Karasik M, Gardner J, Obenschain S

プラズマ・核融合学会年会予稿集 ( 23 ) 190 - 190 2006年11月
30pA27P フォームクライオ重水素実験での中性子計測によるプラズマ診断(ヘリカルI、慣性)

渡利威士, 中井光男, 細田裕計, 疇地宏, 白神宏之, 重森啓介, 境家達弘, 仲佳勇, 武田和夫, 斉藤寛, 李明篤, 有川安信, 三間圀興

プラズマ・核融合学会年会予稿集 ( 23 ) 187 - 187 2006年11月
30pA26P FIREX-1に用いられるクライオターゲットの液体燃料充填方法の開発の現状(ヘリカルI、慣性)

藤村猛, 中井光男, 乗松孝好, 長井圭治, 水田華奈子, 永田みず穂, 木村泰子, 白神宏之, 重森啓介, 疇地宏, 三間圀興, 三戸利行, 岩本晃史

プラズマ・核融合学会年会予稿集 ( 23 ) 186 - 186 2006年11月
30aUG-11 高強度レーザーを用いた地球核構造の解明(30aUG 高エネルギー密度状態の科学(X線・凝縮系プラズマ物性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

一之瀬大吾, 重森啓介, 入舩徹男, 大谷一人, 塩田剛士, 中井光男, 疇地宏

日本物理学会講演概要集 61 ( 1 ) 243 - 243 2006年3月
30pUC-4 レーザーアブレーションに伴う先行加熱の計測と抑制(30pUC 核融合プラズマ(輸送・閉じ込め特性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

大谷一人, 重森啓介, 塩田剛士, 砂原淳, 中井光男, 白神宏之, 疇地宏, 三間圀興

日本物理学会講演概要集 61 ( 1 ) 244 - 244 2006年3月
30pUC-7 フェルミ縮退を用いた高密度プラズマ診断法の開発(30pUC 核融合プラズマ(輸送・閉じ込め特性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

渡利威士, 細田裕計, 中井光男, 白神宏之, 重森啓介, 境家達弘, 武田和夫, 間東紀充, 斉藤寛, 李明篤, 疇地宏, 三間圀興, GOD TMグループ

日本物理学会講演概要集 61 ( 1 ) 245 - 245 2006年3月
30pUC-5 衝撃点火に必要な超高速流体の生成実験(30pUC 核融合プラズマ(輸送・閉じ込め特性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

斉藤寛, 境家達弘, 大谷一人, 塩田剛士, 一之瀬大吾, 重森啓介, 村上匡且, 藤岡慎介, 中井光男, 白神宏之, 長友英夫, 砂原淳, 疇地宏, 三間圀興, Karasik M, Gardner J, Obenschain S

日本物理学会講演概要集 61 ( 1 ) 245 - 245 2006年3月
01aB04 高速点火レーザー核融合炉KOYO-Fの概念設計3,炉システム/燃料系(新概念、炉設計)

乗松孝好, 神前康次, 上田良夫, 岡野邦彦, 功刀資彰, 小西哲之, 坂和洋一, 相良明男, 惣万芳人, 西川正史, 林巧, 古河裕之, 中井光男, 遠藤琢磨, 吉田弘樹, 岩本晃史

プラズマ・核融合学会年会予稿集 ( 23 ) 264 - 264 2006年
23pQA-3 衝撃点火核融合に必要な超高速飛翔体の生成実験(23pQA 核融合プラズマ(慣性閉じ込め核融合/超高強度レーザー),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

境家達弘, 砂原淳, 三間圀興, PHI- PDT, Karasik M, Gardner J, Obenschain S, 斉藤寛, 疇地宏, 村上匡且, 白神宏之, 中井光男, 重森啓介, 藤岡慎介, 長友英夫

日本物理学会講演概要集 61 ( 0 ) 135 - 135 2006年
B. 慣性核融合炉心・ドライバー(9. 一般講演,第6回核融合エネルギー連合講演会報告,本会記事)

中井光男

プラズマ・核融合学会誌 82 ( 8 ) 559 - 559 2006年
28pB07 衝撃点火核融合へのクリティカルパス(慣性)

境家達弘, 斉藤寛, 疇地宏, 大谷一人, 渡利威士, 武田和夫, 一之瀬大吾, 細田裕計, 村上匡且, 藤岡慎介, 重森啓介, 中井光男, 白神宏之, 長友英夫, 砂原淳, 三間圀興, KARASIK M, GARDNER J, OBENSCHAIN S, PHI-group, PDT-group, TM-group, GOD-group

プラズマ・核融合学会年会予稿集 ( 23 ) 91 - 91 2006年
30pA24P フォームクライオターゲットの冷却試験(ヘリカルI、慣性)

岩本晃史, 前川龍司, 三戸利行, 坂上仁志, 本島修, 中井光男, 藤村猛, 乗松孝好, 長井圭治, 白神宏之, 疇地宏, 三間圀興

プラズマ・核融合学会年会予稿集 ( 23 ) 185 - 185 2006年
30pUC-6 衝撃点火に必要な超高速流体の衝突実験(30pUC 核融合プラズマ(輸送・閉じ込め特性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

境家達弘, 白神宏之, 長友英夫, 砂原淳, 大西直文, 疇地宏, 三間圀興, Karasik M, Gardner J, Obenschain S, PHI- PDT, 斉藤寛, 大谷一人, 塩田剛士, 一之瀬大吾, 重森啓介, 村上匡且, 藤岡慎介, 中井光男

日本物理学会講演概要集 61 ( 0 ) 245 - 245 2006年
30pC09P バブル検出器の爆縮放射線計測への応用(プラズマ計測I)

藤原隆史, 中井光男, 白神宏之, 前川修, 吉田國雄, 三間圀興

プラズマ・核融合学会年会予稿集 ( 23 ) 221 - 221 2006年
30pC08P TOF型多チャンネル中性子計測システムの評価とアップグレード(プラズマ計測I)

細田裕計, 渡利威士, 中井光男, 泉信彦, 疇地宏

プラズマ・核融合学会年会予稿集 ( 23 ) 220 - 220 2006年
高速点火実証計画FIREXとその先導的研究―現状と解決すべき課題

疇地宏, 三間圀興, 白神宏之, 重森啓介, 大谷一人, 境家達弘, 兒玉了祐, 反保元伸, 中村浩隆, 西村博明, 藤岡慎介, 犬伏雄一, 田辺稔, 乗松孝好, 中井光男, 長井圭治, 長友英夫, 城崎知至, 砂原淳, 中村龍史, 藤田尚徳, 猿倉信彦, 岩本晃史, 三戸利行, 坂上仁志, 岡本正雄, 磯部光孝, 本島修

核融合エネルギー連合講演会予稿集 6th 63 2006年
19pWG-13 低密度フォームターゲット上でのレーリー・テーラー不安定性の抑制に関する研究(核融合プラズマ(不安定性),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

渡利威士, 中井光男, 長井圭治, 境家達弘, 畦地宏, 白神宏之, 重森啓介, 大谷一人, 間東紀充, 武田和夫, 三間圀興, TM, GOD, PDTグループ

日本物理学会講演概要集 60 ( 2 ) 97 - 97 2005年8月
20aWG-12 ダブルスリット結像バックライトX線ストリークカメラによるフォームクライオ重水素ターゲットの加速軌跡の研究(核融合プラズマ(強結合系/プラズマ応用),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

間東紀充, 山田武史, 李明篤, 藤岡慎介, 境家達弘, 白神宏之, 重森啓介, 中井光男, 畦地宏, 砂原淳, 三間圀興, PHI, PDT, GOD, M group

日本物理学会講演概要集 60 ( 2 ) 103 - 103 2005年8月
21pXK-14 衝撃波プラズマの可視域分光温度計測(診断法・計測器,領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

大谷一人, 重森啓介, 塩田剛士, 中井光男, 白神宏之, 畦地宏, 三間圀興, 阪大レーザー研PHI-PDT-TM-GODグループ

日本物理学会講演概要集 60 ( 2 ) 125 - 125 2005年8月
Temperature-Dependent EUV Spectra of Xenon Plasmas Observed in the Compact Helical System

鈴木千尋, 西村博明, 落合正幸, 加藤隆子, 岡村昇一, MORE Richard M, 西原功修, 中井光男, 重森啓介, 藤岡慎介, 小川宏明

プラズマ・核融合学会誌 81 ( 7 ) 480 - 481 2005年7月
レーザー核融合のためのクライオターゲットシステム

中井光男, 乗松孝好, ナカイミツオ, ノリマツタカヨシ

大阪大学低温センターだより 131 2 - 10 2005年7月
FIREX計画用クライオターゲットのための実証試験装置の冷却特性

岩本晃史, 前川龍司, 三戸利行, 岡本正雄, 本島修, 杉戸正治, 岡田光司, 中井光男, 乗松孝好, 長井圭治

低温工学・超電導学会講演概要集 = Meetings of Cryogenics and Superconductivity 72 42 - 42 2005年5月
24aXG-14 EUV放射プラズマのオパシティー構造と放射効率の関係(診断法・計測器/プラズマ分光・原子過程(イオン温度・流速・負イオン/EuV),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

藤岡慎介, 西村博明, 奥野智晴, 島田義則, 橋本和久, 一木理史, 重森啓介, 中井光男, 陶業争, 上田修義, 安藤強史, 谷勤翠, 長井圭治, 佐々木明, 西川亘, 砂原淳, 西原功修, 宮永憲明, 井澤靖和

日本物理学会講演概要集 60 ( 1 ) 197 - 197 2005年3月
25pXF-13 Recent Progress on Preparation of Planar Cryotarget at ILE

Huang T. X., Nakai M., Shigemori K., Shiraga H., Sakaiya T., Tamari Y., Watari T., Ohtani K., Shiota T., Yamada T., Fujioka S., Sunahara A., Mahigashi N., Miki T., Takeda K., Azechi H., Nagata M., Norimatsu T., Nagai K., Nishihara K., Miyanaga N., Mima K., Izawa Y., Mito T., Iwamoto K.

日本物理学会講演概要集 60 ( 1 ) 227 - 227 2005年3月
01pB06 多波長レーザー照射によるRayleigh-Taylor不安定性の制御(新概念、慣性)

重森啓介, 大谷一人, 砂原淳, 境家達弘, 藤岡慎介, 中井光男, 白神宏之, 疇地宏, 三間圀興

プラズマ・核融合学会年会予稿集 ( 22 ) 197 - 197 2005年
02aB23P 極端紫外光(EUV)発生用低密度薄膜(プラズマ応用)

長井圭治, 乗松孝好, 中井光男, 永田みず穂, 保田ゆづり, 藤岡慎介, 山浦道照, 島田義則, 西村博明, 西原功修, 宮永憲明, 井澤靖和, 三間圀興

プラズマ・核融合学会年会予稿集 ( 22 ) 255 - 255 2005年
02aA26P 衝撃点火実証のためのCHBrターゲットの製作と加速実験の解析(トカマクII、慣性)

斉藤寛, 境家達弘, 疇地宏, 村上匡且, 藤岡慎介, 大谷一人, 塩田剛士, 一之瀬大吾, 重森啓介, 中井光男, 白神宏之, 長友英夫, 砂原淳, 三間圀興, Karasik M, Gardner J, Obenschain S

プラズマ・核融合学会年会予稿集 ( 22 ) 239 - 239 2005年
02aA25P Fabrication and Characterization of Planar Cryogenic Target :

Huang Tianxuan, 中井光男, 重森啓介, 白神宏之, 境家達弘, 渡利威士, 大谷一人, 塩田剛士, 山田武史, 藤岡慎介, 砂原淳, 間東紀充, 三木拓也, 武田和夫, 前川修, 疇地宏, 永田みず穂, 乗松孝好, 長井圭治, 藤田尚徳, 三間圀興, 井澤靖和, 三戸利行, 岩本晃史

プラズマ・核融合学会年会予稿集 ( 22 ) 239 - 239 2005年
02aA24P FIREX計画用クライオターゲットの冷却予備試験(トカマクII、慣性)

岩本晃史, 前川龍司, 三戸利行, 岡本正雄, 本島修, 中井光男, 乗松孝好, 長井圭治

プラズマ・核融合学会年会予稿集 ( 22 ) 238 - 238 2005年
02aA23P ダブルスリット結像X線ストリークカメラによるフォームクライオ重水素ターゲットの加速ダイナミクス(トカマクII、慣性)

間東紀充, 山田武史, 李明篤, 藤岡慎介, 境家達弘, 白神宏之, 重森啓介, 中井光男, 疇地宏, 砂原淳, 三間圀興, PHI, PDT, GOD, TM group

プラズマ・核融合学会年会予稿集 ( 22 ) 238 - 238 2005年
02aA17P 可視域分光によるレーザー照射ターゲットの裏面温度計測(トカマクII、慣性)

大谷一人, 重森啓介, 塩田剛士, 砂原淳, 中井光男, 白神宏之, 疇地宏, 三間圀興

プラズマ・核融合学会年会予稿集 ( 22 ) 235 - 235 2005年
01pC24P 高強度レーザーを用いた無衝突衝撃波生成実験(プラズマ基礎)

三木拓也, 重森啓介, 疇地宏, 高部英明, 兒玉了祐, 中井光男, 境家達弘, Sebastien Lasserre, PHIグループ, Gregory Chris, Woolsey Nigel

プラズマ・核融合学会年会予稿集 ( 22 ) 215 - 215 2005年
01pB12 高速点火原理実証実験(FIREX)用燃料保持プラスチックの研究(1)(新概念、慣性)

長井圭治, 乗松孝好, 中井光男, 伊東富由美, 根本修克, 岩本晃史, 三戸利行, 白神宏之, 疇地宏, 三間圀興

プラズマ・核融合学会年会予稿集 ( 22 ) 200 - 200 2005年
01pB10 衝撃点火核融合へのクリティカルパス : 超高速流体の実現(新概念、慣性)

境家達弘, 斉藤寛, 疇地宏, 大谷一人, 塩田剛士, 一之瀬大吾, 重森啓介, 村上匡且, 藤岡慎介, 中井光男, 白神宏之, 長友英夫, 砂原淳, 三間圀興, Karasik M, Gardner J, Obenschain S

プラズマ・核融合学会年会予稿集 ( 22 ) 199 - 199 2005年
01pB09 高速点火ターゲットの非対称爆縮ダイナミクス(新概念、慣性)

白神宏之, 間東紀充, 李明徳, 渡利威士, 中井光男, 疇地宏, 児玉了祐, 田中和夫, 長友英夫

プラズマ・核融合学会年会予稿集 ( 22 ) 198 - 198 2005年
20pXK-7 レーザー多段衝撃波によるダイヤモンドの金属化(プラズマ科学(超高強度レーザー),領域2(プラズマ基礎・プラズマ科学・核融合プラズマ・プラズマ宇宙物理))

塩田剛士, 境家達弘, 畦地宏, 重森啓介, 田中和夫, 吉田正典, 永尾浩文, 尾崎典雅, 大谷一人, 一之瀬大吾, 若林邦彦

日本物理学会講演概要集 60 ( 0 ) 111 - 111 2005年
30aC05 レーザー多段衝撃波によるダイヤモンドの金属化(プラズマ応用)

塩田剛士, 重森啓介, 田中和夫, 大谷一人, 一之瀬大吾, 境家達弘, 疇地宏, 尾崎典雅, 吉田正典, 若林邦彦, 永尾浩文, 近藤建一

プラズマ・核融合学会年会予稿集 ( 22 ) 159 - 159 2005年
30aC07 レーザー生成スズプラズマEUV光源におけるオパシティ効果とその計測(プラズマ応用)

西村博明, 藤岡慎介, 奥野智晴, 安藤強史, 島田義則, 山浦道照, 橋本和久, 中井光男, 重森啓介, 長井圭治, 乗松孝好, 砂原淳, 佐々木明, 西川亘, 西原功修, 宮永憲明, 井澤靖和, 三間圀興

プラズマ・核融合学会年会予稿集 ( 22 ) 160 - 160 2005年
13pXB-10 レーザー照射ターゲットにおけるレイリー・テイラー不安定性の観測(核融合プラズマ : 不安定性, 領域 2)

境家達弘, 疇地宏, 重森啓介, 中井光男, 白神宏之, 砂原淳, 長友英夫, 井澤靖和, PE1- MT- T, GO-グループ

日本物理学会講演概要集 59 ( 2 ) 168 - 168 2004年8月
14pXB-5 スリット結像バックライト X 線ストリークカメラによるフォームクライオターゲット重水素ターゲットの加速軌跡の研究(核融合プラズマ : 加熱・輸送・閉じ込め, 領域 2)

山田武史, 白神宏之, 藤岡慎介, 間東紀充, 重森啓介, 中井光男, 砂原淳, 疇地宏, 井澤靖和, 阪大レーザー研PE, MT- GOD, T-グループ

日本物理学会講演概要集 59 ( 2 ) 180 - 180 2004年8月
14pXB-4 極低温重水素充填フォームターゲットを用いたレーザー噴出加速実験(核融合プラズマ : 加熱・輸送・閉じ込め, 領域 2)

中井光男, 重森啓介, 白神宏之, 境家達弘, 玉利洋平, 渡利威士, 大谷一人, 塩田剛士, 山田武史, 藤岡伸介, 砂原淳, 間東紀充, 三木拓也, 武田和夫, 前川修, 疇地宏, 永田みず穂, 乗松孝好, 長井圭治, 西原功修, 田中和夫, 兒玉了祐, 宮永憲明, 三間国興, 井澤靖和, 岩本晃史, 三戸利行

日本物理学会講演概要集 59 ( 2 ) 179 - 179 2004年8月
13pXB-9 極低温重水素充填フォームターゲットにおける予備加熱計測(核融合プラズマ : 不安定性, 領域 2)

重森啓介, 中井光男, 白神宏之, 境家達弘, 大谷一人, 砂原淳, 渡利威至, 塩田剛士, 玉利洋平, 山田武史, 三木拓也, 武田和夫, 間東紀充, 疇地宏, 藤岡慎介, 永田みず穂, 長井圭治, 乗松孝好, 西原功修, 三間圀興, 井澤靖和, 岩本晃史, 三戸利行

日本物理学会講演概要集 59 ( 2 ) 168 - 168 2004年8月
13pXB-8 多波長レーザー同時照射によるレイリー・テイラー不安定性の抑制(核融合プラズマ : 不安定性, 領域 2)

大谷一人, 重森啓介, 境家達弘, 藤岡慎介, 砂原淳, 中井光男, 白神宏之, 疇地宏, 井澤靖和, 阪大レーザー研 PE, MT- GOD, T-グループ

日本物理学会講演概要集 59 ( 2 ) 168 - 168 2004年8月
13pXB-6 低密度フォームターゲットを用いたレーリー・テーラー不安定性の抑制(核融合プラズマ : 不安定性, 領域 2)

渡利威士, 中井光男, 長井圭治, 疇地宏, 白神宏之, 重森啓介, 乗松孝好, 境家達弘, 藤岡慎介, 玉利洋平, 大谷一人, 奥野一樹, 山中龍彦, MT GO Tグループ

日本物理学会講演概要集 59 ( 2 ) 167 - 167 2004年8月
13pXB-5 プラズマ密度計測による高速電子の非局所熱伝導への効果の検証(核融合プラズマ : 不安定性, 領域 2)

玉利洋平, 疇地宏, 境家達弘, 大谷一人, 渡利威士, 山田武史, 白神宏之, 中井光男, 重森啓介, 藤岡慎介, レーザー・ターゲット, 計測グループ

日本物理学会講演概要集 59 ( 2 ) 167 - 167 2004年8月
次世代半導体リソグラフィーに向けた極端紫外光源レーザープラズマの研究

藤岡慎介, 西村博明, 中井光男, 重森啓介, 陶業争, 松井亮二, 日比野隆宏, 奥野智晴, 上田修義, 長井圭治, 乗松孝好, 藤田尚徳, 西原功修, 宮永憲明, 中塚正大, 井澤靖和, 内田成明, 島田義則, 山浦道照, 橋本和久

電気学会研究会資料. PST, プラズマ研究会 2004 ( 7 ) 1 - 6 2004年3月
28aWJ-2 中波長レイリー・テイラー不安定性の観測(核融合プラズマ(不安定性))(領域2)

境家達弘, 疇地宏, 重森啓介, 中井光男, 白神宏之, 長友英夫, 大西直文, 砂原淳, 井澤靖和, PE1-グループ, MT-グループ, T-グループ, GO-グループ

日本物理学会講演概要集 59 ( 1 ) 222 - 222 2004年3月
28aWJ-3 ダブル・アブレーションを用いたレイリー・テイラー不安定性の抑制(核融合プラズマ(不安定性))(領域2)

藤岡慎介, 砂原淳, 大西直文, 疇地宏, 白神宏之, 中井光男, 重森啓介, 長井圭治, 乗松孝好, 井澤靖和, M

日本物理学会講演概要集 59 ( 1 ) 222 - 222 2004年3月
28pWJ-6 激光GXII号レーザーに於けるクライオ重水素ターゲット実験計画(核融合プラズマ(加熱))(領域2)

中井光男, 疇地宏, 乗松孝好, 白神宏之, 重森啓介, 長井圭治, 田中和夫, 兒玉了祐, 宮永憲明, 西原功修, 三間国興, 井澤靖和, 三戸利行, 岩本晃史

日本物理学会講演概要集 59 ( 1 ) 229 - 229 2004年3月
24aB22P 単色性レーザープラズマEUV発生ターゲットとその高繰り返し照射用ターゲット化(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

長井圭治, 谷勤翠, 中井光男, 乗松孝好, 奥野智晴, 陶業争, 藤岡慎介, 西村博明, 島田義則, 橋本和久, 山浦道照, 内田成明, 西原功修, 宮永憲明, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 21 ) 160 - 160 2004年
25pB02P CHS装置におけるXe極端紫外スペクトルの計測(プラズマ計測, (社) プラズマ・核融合学会第21回年会)

鈴木千尋, 西村博明, 落合正幸, 宋美英, 加藤隆子, 岡村昇一, モアリチャード, 西原功修, 中井光男, 重森啓介, 藤岡慎介, 小川宏明, 佐々木明

プラズマ・核融合学会年会予稿集 ( 21 ) 210 - 210 2004年
25pA04 球対称爆縮ターゲットのペタワットレーザー追加熱とその機構の解明(慣性核融合, (社) プラズマ・核融合学会第21回年会)

北川米喜, 千徳靖彦, 田中和夫, 児玉了祐, 西村博明, 中井光男, 乗松孝好, 砂原淳

プラズマ・核融合学会年会予稿集 ( 21 ) 182 - 182 2004年
24aB38P 低密度フォームターゲットを用いたレイリー・テイラー不安定性の抑制(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

渡利威士, 中井光男, 長井圭治, 疇地宏, 白神宏之, 重森啓介, 境家達弘, 大谷一人, 山田武史, 乗松孝好, 井澤靖和, GODグループ, MTグループ, Tグループ

プラズマ・核融合学会年会予稿集 ( 21 ) 167 - 167 2004年
24aB37P 多波長レーザー同時照射によるレイリー・テイラー不安定性の抑制(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

大谷一人, 重森啓介, 境家達弘, 藤岡慎介, 砂原淳, 中井光男, 白神宏之, 疇地宏, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 21 ) 167 - 167 2004年
24aB36P レーザー照射ターゲットにおけるレイリー・テイラー不安定性の観測(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

境家達弘, 疇地宏, 重森啓介, 中井光男, 白神宏之, 大西直文, 砂原淳, 長友英夫, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 21 ) 166 - 166 2004年
24aB35P スリット結像X線ストリークカメラによる極低温重水素充填平板フォームターゲットの加速軌跡の研究(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

山田武史, 白神宏之, 藤岡慎介, 間東紀充, 中井光男, 重森啓介, 境家達弘, 玉利洋平, 大谷一人, 渡利威士, 永田みず穂, 武田和夫, 三木拓也, 塩田剛士, 長井圭治, 乗松孝好, 砂原淳, 疇地宏, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 21 ) 166 - 166 2004年
24aB34P 極低温重水素充填フォームターゲットにおける予備加熱計測(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

重森啓介, 中井光男, 白神宏之, 境家達弘, 大谷一人, 砂原淳, 渡利威至, 塩田剛士, 玉利洋平, 山田武史, 三木拓也, 武田和夫, 間東紀充, 疇地宏, 藤岡慎介, 永田みず穂, 長井圭治, 乗松孝好, 西原功修, 三間圀興, 井澤靖和, 岩本晃史, 三戸利行

プラズマ・核融合学会年会予稿集 ( 21 ) 165 - 165 2004年
24aB33P レーザー核融合基礎実験用極低温重水素充填平板フォームターゲット(プラズマ応用、慣性核融合, (社) プラズマ・核融合学会第21回年会)

中井光男, 重森啓介, 白神宏之, 境家達弘, 玉利洋平, 渡利威士, 大谷一人, 塩田剛士, 山田武史, 藤岡伸介, 砂原淳, 間東紀充, 三木拓也, 武田和夫, 前川修, 疇地宏, 永田みず穂, 乗松孝好, 長井圭治, 西原功修, 田中和夫, 兒玉了祐, 宮永憲明, 三間国興, 井澤靖和, 岩本晃史, 三戸利行

プラズマ・核融合学会年会予稿集 ( 21 ) 165 - 165 2004年
Experimental study on ablative stabilization of Rayleigh-Taylor instability of laser-irradiated target

Proceedings of SPIE 5448, 634 2004年
Nanoporous and Low-Density Materials For Laser Produced Extreme UV Light Source

Trans. Mater. Res. Soc. Jpn. 2004年
Experimental study on ablative stabilization of Rayleigh-Taylor instability of laser-irradiated targets

K Shigemori, T Sakaiya, K Otani, S Fujioka, M Nakai, H Azechi, H Shiraga, Y Tamari, K Okuno, A Sunahara, H Nagatomo, M Murakami, K Nishihara, Y Izawa

HIGH-POWER LASER ABLATION V, PTS 1 AND 2 5448 634 - 641 2004年
Properties of EUV emissions from laser produced tin plasmas

Y Shimada, H Nishimura, K Hashimoto, M Yamaura, K Shigemori, M Nakai, S Fujioka, S Uchida, T Okuno, T Hibino, N Ueda, R Matsui, YZ Tao, K Nagai, T Norimatsu, T Kawamura, A Sunahara, K Nishihra, N Miyanaga, M Nakatsuka, Y Izawa, C Yamanaka

EMERGING LITHOGRAPHIC TECHNOLOGIES VIII 5374 912 - 917 2004年
高Z物質ドープによるレーザー核融合ターゲット表面でのレイリー・テイラー不安定性の抑制

藤岡慎介, 砂原淳, 大西直文, 疇地宏, 白神宏之, 中井光男, 重森啓介, 村上匡且, 長井圭治, 西村博明, 乗松孝好, 西原功修, 井澤靖和, 野崎真也, 陳延偉

プラズマ・核融合学会誌 80 ( 7 ) 597 - 604 2004年
Properties of EUV emissions from laser produced tin plasmas

Yoshinori Shimada, Hiroaki Nishimura, Kazuhisa Hashimoto, Michiteru Yamaura, Keisuke Shigemori, Mitsuo Nakai, Shinsuke Fujioka, Shigeaki Uchida, Tomoharu Okuno, Takahiro Hibino, Nobuyoshi Ueda, Ryoji Matsui, Yezheng Tao, Keiji Nagai, Takayoshi Norimatsu, Tohru Kawamura, Atsushi Sunahara, Katsunobu Nishihra, Noriaki Miyanaga, Masahiro Nakatsuka, Yasukazu Izawa, C. Yamanaka

Proceedings of SPIE - The International Society for Optical Engineering 5374 ( 2 ) 912 - 917 2004年
レーザー生成球対称Snプラズマからの極端紫外線(EUV)放射特性

西村博明, 重森啓介, 中井光男, 藤岡慎介, 島田義則, 橋本和久, 山浦道照, 内田成明, 松井亮二, 日比野隆宏, 奥野智晴, 陶業争, 長井圭治, 乗松孝好, 長友英夫, ZHAKHOVSKII Vasilli, 古河裕之, 砂原淳, 河村徹, 西川亘, 村上匡且, 西原功修, 宮永憲明, 中塚正大, 井澤靖和

プラズマ・核融合学会誌第80巻4号第80巻4号 ( 4 ) 325 - 330 2004年
レーザー生成球対称Snプラズマからの極端紫外線(EUV)放射特性

西村博明, 重森啓介, 中井光男, 藤岡慎介, 島田義則, 橋本和久, 山浦道照, 内田成明, 松井亮二, 日比野隆宏, 奥野智晴, 陶業争, 長井圭治, 乗松孝好, 長友英夫, ZHAKHOVSKII Vasilli, 古河裕之, 砂原淳, 河村徹, 西川亘, 村上匡且, 西原功修, 宮永憲明, 中塚正大, 井澤靖和

プラズマ・核融合学会誌 = Journal of plasma and fusion research 第80巻4号 ( 4 ) 325 - 330 2004年
Experimental technique for launching miniature flying plates using laser pulses

K Okada, K Wakabayashi, H Takenaka, H Nagao, K Kondo, T Ono, K Takamatsu, N Ozaki, K Nagai, M Nakai, KA Tanaka, M Yoshida

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 29 ( 1-10 ) 497 - 502 2003年12月
Experimental technique for launching miniature flying plates using laser pulses

K Okada, K Wakabayashi, H Takenaka, H Nagao, K Kondo, T Ono, K Takamatsu, N Ozaki, K Nagai, M Nakai, KA Tanaka, M Yoshida

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 29 ( 1-10 ) 497 - 502 2003年12月
21aYB-1 中間波長領域におけるレイリー・テイラー不安定性の成長安定化

境家達弘, 疇地宏, 白神宏之, 中井光男, 重森啓介, 大西直文, 砂原淳, 長友英夫, 西原功修, 井澤靖和, PE, MT-, T, GO-グループ

日本物理学会講演概要集 58 ( 2 ) 162 - 162 2003年8月
21aYB-6 核融合反応中性子を用いたフェルミ縮退プラズマの診断

渡利威士, 中井光男, 泉信彦, 藤岡慎介, 玉利洋平, 古河裕之, 西原功修, 白神宏之, 疇地宏, 井澤靖和, MT GO Tグループ

日本物理学会講演概要集 58 ( 2 ) 163 - 163 2003年8月
21aYB-4 連続線絶対分光を用いた爆縮プラズマ密度計測法の開発

玉利洋平, 疇地宏, Sakaiya T, 藤岡慎介, 奥野一樹, 犬伏雄一, 白神宏之, 中井光男, 重森啓介, 計測・レーザー, ターゲットグループ, 井澤靖和

日本物理学会講演概要集 58 ( 2 ) 162 - 162 2003年8月
21aYB-3 レーザー生成プラズマ中での輻射エネルギー輸送によるダブル・アブレーション構造の形成

藤岡慎介, 白神宏之, 重森啓介, 中井光男, 砂原淳, 西原功修, 長井圭治, 乗松孝好, 西村博明, 疇地宏, 井澤靖和, EUV-project group, MT/GO/T groups

日本物理学会講演概要集 58 ( 2 ) 162 - 162 2003年8月
21aYB-2 多波長同時照射によるレイリー・テイラー不安定性の抑制と爆縮への応用

大谷一人, 重森啓介, 境家達弘, 藤岡慎介, 砂原淳, 中井光男, 白神宏之, 疇地宏, 井沢靖和, PE GO MT, Tグループ

日本物理学会講演概要集 58 ( 2 ) 162 - 162 2003年8月
28pZL-8 高強度レーザーを用いた地球深部ダイナミクスの研究

重森啓介, 入舩徹男, 小野貴俊, 尾崎典雅, 若林邦彦, 藤岡慎介, 大谷一人, 中井光男, 疇地宏

日本物理学会講演概要集 58 ( 1 ) 221 - 221 2003年3月
29aZL-8 多波長同時照射によるレイリー・テーラー不安定性成長の抑制

大谷一人, 重森啓介, 境家達弘, 藤岡慎介, 砂原淳, 中井光男, 白神宏之, 疇地宏, 山中龍彦, PEグループ, GOグループ, MTグループ, Tグループ

日本物理学会講演概要集 58 ( 1 ) 229 - 229 2003年3月
29aZL-7 アブレーティブレーリー・テーラー不安定性の基礎実験 : 完全計測に向けて

中井光男, 疇地宏, 白神宏之, 重森啓介, 境家達弘, 藤岡慎介, 玉利洋平, 大谷一人, 奥野一樹, 渡利威士, 西村博明, 前川修, 宮永憲明, 乗松孝好, 長井圭治, 西原功修, 砂原淳, 長友英夫, 高部英明, 三間圀興, 山中龍彦, GO-, T, MT-グループ

日本物理学会講演概要集 58 ( 1 ) 229 - 229 2003年3月
29aZL-12 位相型フレネルゾーンプレートを用いたアブレーション密度計測によるレーリー・テーラー不安定性の理解

玉利洋平, 疇地宏, 境家達弘, 藤岡慎介, 白神裕之, 中井光男, 重森啓介, レーザー, 計測, ターゲットグループ

日本物理学会講演概要集 58 ( 1 ) 230 - 230 2003年3月
29aZL-11 低密度フォームターゲットを用いたレーザーアブレィティブレイリー・テーラー不安定性の密度依存性に関する研究

渡利威士, 中井光男, 長井圭治, 疇地宏, 白神宏之, 重森啓介, 乗松孝好, 境家達弘, 藤岡慎介, 玉利洋平, 大谷一人, 奥野一樹, 山中龍彦, MT, GO, Tグループ

日本物理学会講演概要集 58 ( 1 ) 230 - 230 2003年3月
29aZL-10 ダブル・アブレーション構造によるレイリー・テイラー不安定性の抑制

藤岡慎介, 砂原淳, 大西直文, 白神宏之, 重森啓介, 中井光男, 疇地宏, 西原功修, 山中龍彦, PE, GO, MT, Tグループ

日本物理学会講演概要集 58 ( 1 ) 230 - 230 2003年3月
31pSH-8 超短パルスレーザーとキャピラリーターゲットによる高速電子の加速

北川米喜, 赤松伸, 坂本渉, 千徳靖彦, 藤田尚徳, 田中和夫, 児玉了祐, 乗松孝好, 中井光男, 吉田英次

日本物理学会講演概要集 58 ( 1 ) 128 - 128 2003年3月
26aB06 高Z物質ドープによるレーザー核融合ターゲット表面でのレイリー・テイラー不安定性の抑制(慣性核融合)

藤岡慎介, 砂原淳, 大西直文, 疇地宏, 白神宏之, 中井光男, 重森啓介, 長井圭治, 乗松孝好, 西原功修, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 20 ) 149 - 149 2003年
28aB04 EUVプラズマの密度プロファイルとオパシティ測定(プラズマ基礎・応用III、加熱II)

重森啓介, 中井光男, 藤岡慎介, 西村博明, 島田義則, 橋本和久, 山浦道照, 内田成明, 砂原淳, 西原功修, 宮永憲明, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 20 ) 236 - 236 2003年
28aB02 レーザー生成プラズマからの極端紫外線(EUV)放射特性(プラズマ基礎・応用III、加熱II)

西村博明, 重森啓介, 中井光男, 藤岡慎介, 島田義則, 橋本和久, 山浦道照, 内田成明, 松井亮二, 日比野隆宏, 奥野智晴, 陶業争, 長井圭治, 乗松孝好, Zhakhovickii V, 古河裕之, 河村徹, 砂原淳, 村上匡且, 西原功修, 藤間一美, 香川貴司, 加藤隆子, More R, 小池文博, 西川亘, 佐々木明, 田沼肇, 藤田尚徳, 吉田英次, 椿本孝治, 藤本靖, 中塚正大, 宮永憲明, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 20 ) 235 - 235 2003年
28aA14P レーザー生成SnプラズマからのX線放射のプラズマ温度密度依存性(慣性核融合、プラズマ基礎・応用)

河村徹, 藤間一美, 小池文博, 古河裕之, 砂原淳, 島田義則, 山浦道照, 橋本和久, 内田成明, 中井光男, 重森啓介, 長井圭治, 乗松孝好, 西村博明, 西原功修, 宮永憲明, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 20 ) 221 - 221 2003年
28aA11P EUV放射のレーザー波長依存性(慣性核融合、プラズマ基礎・応用)

島田義則, 山浦道照, 橋本和久, 内田成明, 砂原淳, 河村徹, 古河裕之, 山中千代衛, 重森啓介, 中井光男, 西村博明, 奥野智晴, 日比野隆宏, 松井亮二, Sohbatzadeh F.L, Tao Y, 長井圭治, 乗松孝好, 村上匡且, 西原功修, 宮永憲明, 井澤靖和

プラズマ・核融合学会年会予稿集 ( 20 ) 220 - 220 2003年
28aA04P 2波長同時照射によるレイリー・テイラー不安定性の抑制と爆縮実験への応用(慣性核融合、プラズマ基礎・応用)

大谷一人, 重森啓介, 境家達弘, 藤岡慎介, 砂原淳, 中井光男, 白神宏之, 疇地宏, 井澤靖和, 阪大レーザー研, PE-MT-GO-T-グループ, 阪大レーザー研, PE-MT-GO-T-グループ

プラズマ・核融合学会年会予稿集 ( 20 ) 216 - 216 2003年
28aA03P 低密度フォームターゲットを用いたR-T不安定性の抑制に関する研究(慣性核融合、プラズマ基礎・応用)

渡利威士, 中井光男, 疇地宏, 長井圭治, 乗松孝好, 井澤靖和, 計測グループ計測グループ, ターゲットグループ, ターゲットグループ

プラズマ・核融合学会年会予稿集 ( 20 ) 216 - 216 2003年
Characterization of GEKKO/HIPER-Driven Shock Waves for Equation-of-State Studies Under Ultra- High Pressures

N. Ozaki, K. A. Tanaka, T. Ono, K, Shigemori M, Nakai M, Yoshida K, Wakabayashi, K. Kondo, H. Nagao, Y. Igarashi, H. Azechi, T. Yamanaka

Annual Progress Report 2002, Inst. Laser Engr., Osaka Univ. 66 - 69 2003年
29aZL-13 紫外および可視域分光による衝撃圧縮されたポリスチレンの温度と状態方程式の同時計測

小野貴俊, 永尾浩文, 五十嵐義高, 片岡俊彦, 中野元博, 田中和夫, 尾崎典雅, 重森啓介, 長井圭治, 中井光男, 吉田正典, 若林邦彦, 近藤建一

日本物理学会講演概要集 58 ( 0 ) 231 - 231 2003年
6pSQ-6 高強度レーザーを用いたブラスト波の生成とその伝搬(プラズマ基礎(波動・不安定性),領域2)

高山龍英, 畦地宏, 中井光男, 重森啓介, 児玉了祐, 宮越健之, 倉橋孝宏

日本物理学会講演概要集 57 ( 2 ) 155 - 155 2002年8月
8aSR-3 ペタワットレーザーによる高速点火研究 : コーン付きシェルターゲットの高密度爆縮((高速点火),慣性核融合,領域2)

白神宏之, 児玉了祐, 重森啓介, 藤岡慎介, 村中崇信, 田中基裕, 玉利洋平, 中井光男, 遠山祐典, 長友英夫, PE, MT, T, GOD, TSグループ, PWプロジェクトグループ, 三間圀興, 山中龍彦

日本物理学会講演概要集 57 ( 2 ) 178 - 178 2002年8月
8aSR-12 プラズマ中の高遠電子が作り出す : 超強磁場の計測((高速点火),慣性核融合,領域2)

倉橋孝宏, 田中和夫, 児玉了祐, 白神宏之, 北川米喜, 山中龍彦, 乗松孝好, 三間圀興, 長友英夫, 躊地宏, 西村博明, 藤田尚徳, 奥野孝久, 中井光男, 重森啓介, Zheng J, 遠山祐典, 藤岡慎介, 玉利洋平, 佐藤隆史, 田中基裕, 藪内俊穀, MT班, GOD班, T班

日本物理学会講演概要集 57 ( 2 ) 180 - 180 2002年8月
8aSR-11 ペタワットレーザーによる高速点火研究 : X線分光法によるエネルギー付与診断((高速点火),慣性核融合,領域2)

犬伏雄一, 西村博明, 松井売, 越智義浩A, 藤岡慎介, 遠山祐典, 重森啓介, 中井光男, 児玉了祐, 白神宏之, 田中和夫, 城崎知至, 長友英夫, 三問圀興, 北川米喜, 藤田尚徳, 実野孝久, 宮永憲明, 片澤靖和, 乗松孝好, 長井圭治, 山中龍彦, GOD, MT, Tグループ

日本物理学会講演概要集 57 ( 2 ) 180 - 180 2002年8月
8aSR-10 RWレーザーによる高速点火実験 : 爆縮コア中を通過する電子の振る舞い((高速点火),慣性核融合,領域2)

佐藤隆史, 田中和夫, 児玉了祐, 自神宏之, 北川米喜, 山中龍彦, 乗松孝好, 三間圀興, 長友英夫, 疇地宏, 西村博明, 藤田尚徳, 真野孝久, 中井光男, 重森啓介, Zheng J, 遠山祐典, 藤岡慎介, 玉利洋平, 倉橋孝宏, 田中基裕, 薮内俊敏, MT班, GOD班, T班

日本物理学会講演概要集 57 ( 2 ) 180 - 180 2002年8月
8aSR-1 ペタワットレーザーによる高速点火研究((高速点火),慣性核融合,領域2)

兒玉了祐, 白神宏之, 重森啓介, 遠山祐典, 藤岡慎介, 村中崇信, 田中和夫, 畦地宏, 西村博明, 中井光男, 宮永憲明, 北川米善, 藤田尚徳, 実野孝久, 阪部周二, 乗松孝好, 長井圭冶, 三間圀興, 長友英夫, 城崎知至, 井沢靖和, 山中龍彦, PE, MT, T, GOD, TSグループ, PWプロジェクトグループ, Norreys P, Habara H, Krushelnick K, Zepf M

日本物理学会講演概要集 57 ( 2 ) 178 - 178 2002年8月
7aSS-9 位相型フレネルゾーンプレート結像法における背景光解析(慣性核融合(超短パルスレーザープラズマ・流体物理・重イオン),領域2)

玉利洋平, 躊地宏, 境家達弘, 藤岡慎介, 奥野一樹, 大谷一人, 渡利威士, 白神宏之, 中井光男, 重森啓介, レーザー, 計測, ターゲットグループ

日本物理学会講演概要集 57 ( 2 ) 168 - 168 2002年8月
7aSS-8 レーザー加速ターゲットにおけるレイリー・テイラー不安定性の安定化に関する実験解析(慣性核融合(超短パルスレーザープラズマ・流体物理・重イオン),領域2)

堺家達弘, 躊地宏, 白神宏之, 中井光男, 重森啓介, 藤岡慎介, 玉利洋平, 大谷一人, 村中崇信, 西原功修, 砂原淳, 高部英明, 長友英夫, 宮永憲明, 山中龍彦, MT-グループ, T-グループ, GO-グループ

日本物理学会講演概要集 57 ( 2 ) 168 - 168 2002年8月
7aSS-7 レーザー直接照射アプレーション加遠の安定性に関する実験的研究 : GXII-HIPER実験の現状(慣性核融合(超短パルスレーザープラズマ・流体物理・重イオン),領域2)

中井光男, 疇地宏, 白神宏之, 重森啓介, 境家達弘, 藤岡慎介, 玉利洋平, 村中崇信, 田中基裕, 大谷一人, 奥野一樹, 渡利威士, 西村博明, 前川修, 宮永憲明, 乗松孝好, 長井圭治, 西原功修, 砂原淳, 長友英夫, 高部英明, 三間圀興, 山中龍彦, GO-グループ, T-グループ, MT-グループ

日本物理学会講演概要集 57 ( 2 ) 168 - 168 2002年8月
24pWJ-1 レーザー直接照射アブレーション加速の安定性に関する実験的研究(24pWJ 慣性閉じ込め(レーザー核融合),領域2(プラズマ物理・核融合,放電分野))

中井光男, 疇地宏, 白神宏之, 重森啓介, 錦野将元, 境家達弘, 金井裕樹, 藤岡慎介, 玉利洋平, 西村博明, 前川修, 中塚正大, 金辺忠, 乗松孝好, 西原功修, 砂原淳, 長友英夫, 高部英明, 三間國興, 山中龍彦

日本物理学会講演概要集 57 ( 1 ) 177 - 177 2002年3月
24pWJ-4 多波長レーザー照射による非局所電子熱輸送を用いたレイリー・テーラー不安定性成長率の抑制(24pWJ 慣性閉じ込め(レーザー核融合),領域2(プラズマ物理・核融合,放電分野))

重森啓介, 境家達弘, 疇地宏, 中井光男, 白神宏之, 錦野将元, 藤岡慎介, 玉利洋平, 西原功修, 砂原淳, 山中龍彦

日本物理学会講演概要集 57 ( 1 ) 178 - 178 2002年3月
24pWJ-3 アブレーティブ-レイリー・テイラー不安定性の実験的研究(24pWJ 慣性閉じ込め(レーザー核融合),領域2(プラズマ物理・核融合,放電分野))

境家達弘, 疇地宏, 白神宏之, 中井光男, 重森啓介, 錦野将元, 藤岡慎介, 玉利洋平, 越智義浩, 西村博明, 西原功修, 砂原淳, 高部英明, 長友英夫, 宮永憲明, 山中龍彦

日本物理学会講演概要集 57 ( 1 ) 178 - 178 2002年3月
24pWJ-2 アブレーティブ・レーリー・テーラー不安定性の理解へ向けたアブレーション密度計測(24pWJ 慣性閉じ込め(レーザー核融合),領域2(プラズマ物理・核融合,放電分野))

藤岡慎介, 白神宏之, 錦野将元, 境家達弘, 玉利洋平, 重森啓介, 中井光男, 疇地宏, 山中達彦

日本物理学会講演概要集 57 ( 1 ) 177 - 177 2002年3月
27pZB-2 位相型ゾーンプレートをもちいたアブレーションプラズマ密度計測(27pZB 診断法・計測器(領域内横断),領域2(プラズマ物理・核融合,放電分野))

玉利洋平, 疇地宏, 錦野将元, 境家達弘, 藤岡慎介, 金井祐樹, 越智義浩, 白神宏之, 中井光男, 重森啓介

日本物理学会講演概要集 57 ( 1 ) 220 - 220 2002年3月
27pZB-6 レーザー直接照射法によるポリスチレンの超高圧状態方程式測定(27pZB 診断法・計測器(領域内横断),領域2(プラズマ物理・核融合,放電分野))

小野貴俊, 近藤建一, 永尾浩文, 片岡俊彦, 中野元博, 田中和夫, 尾崎典雅, 高松喜久雄, 長井圭治, 中井光男, 吉田正典, 岡田賢, 若林邦彦

日本物理学会講演概要集 57 ( 0 ) 221 - 221 2002年
EOS Measurements of Polystyrene Using HIPER Laser System

T. Ono, N. Ozaki, K. Takamatsu, K. Nagai, M, Nakai M, Yoshida K, Okada, K, Wakabayashi, K. Kondo, H, Nagao T, Kataoka M, Nakano, K, A. Tanaka

Annual Progress Report 2001, Inst. Laser Engr., Osaka Univ. 68 - 69 2002年
7aSS-10 レーザー誘起衝撃波による重水素化ポリエチレンの状態方程式計測(慣性核融合(超短パルスレーザープラズマ・流体物理・重イオン),領域2)

尾崎典雅, 岡田賢, 若林邦彦, 近藤建一, 永尾浩文, Koenig M, Benuzzi-Mounaix A, Batani D, 田中和夫, 高松喜久雄, 小野貴悛, 中井光男, 長井圭治, 中野元博, 片岡俊彦, 吉田正典

日本物理学会講演概要集 57 ( 0 ) 168 - 168 2002年
ダイヤモンドのテラパスカル領域における状態方程式

永尾浩文, 近藤建一, 小野貴俊, 高松喜久雄, 尾崎典雅, 長井圭治, 中井光男, 田中和夫, 若林邦彦, 岡田賢, 吉田正典

平成13年度衝撃波シンポジウム,Mar.14-16, 2002, 513 - 516 2002年
Shock compression by intense laser irradiation and spectroscopic measurements

H.Nagao A.Matsua, K.G.Nakamura, K.Kondo, T.Ono, K.Takamatsu, N.Ozaki, K.Nagai, M.Nakai, K.A.Tanaka, K.Wakabayashi, K.Okada, M.Yoshida

Abstract of the JST Int. Symp. Control of Molecules in Intense Laser Fields, Sept.9-10, 2002 P-23 2002年
8aSR-9 Fast Ignitor Research with PW Laser Observation of Fast Heated Plasma with Ultra-Fast 2Dx-ray Imaging Technique

藤岡慎介, 北川米善, 田中和夫, 乗松孝好, 三間圀興, 山中龍彦, PE, TS, T, G, MTグループ, 村中崇信, 白神宏之, 児玉了祐, 重森啓介, 中井光男, 田中基裕, 遠山祐典, 藤田尚徳

日本物理学会講演概要集 57 ( 0 ) 180 - 180 2002年
鉄も超伝導に

清水克哉, シミズカツヤ

大阪大学低温センターだより 116 15 - 18 2001年10月
20aRA-1 レーザー照射ターゲットにおける流体力学的不安定性に関する研究

白神宏之, 中井光男, 重森啓介, 畦地宏, 村中崇信, 錦野将元, 境家達弘, 藤岡慎介, 玉利洋平, 金井祐樹, 宮永憲明, 西村博明, 越智義浩, 西原功修, 砂原淳, 高部英明, 長友英夫, 山中龍彦, MT T GOグループ

日本物理学会講演概要集 56 ( 2 ) 154 - 154 2001年9月
20aRA-5 シャインスルーによる内部初期擾乱の成長とターゲット内部の流体運動制御

錦野将元, 白神宏之, 藤田和久, 大西直文, 藤岡慎介, 越智義浩, 宮永憲明, 長井圭治, 西村博明, 境家達弘, 重森啓介, 中井光男, 疇地宏, 山中龍彦, MT GO Tグループ

日本物理学会講演概要集 56 ( 2 ) 155 - 155 2001年9月
20aRA-4 位相型ゾーンプレート(FPZP)をもちいた高空間分解能プラズマ計測

玉利洋平, 疇地宏, 錦野将元, 境家達弘, 藤岡慎介, 越智義浩, 白神宏之, 中井光男, 重森啓介, レーザー, 計測, ターゲットグループ

日本物理学会講演概要集 56 ( 2 ) 155 - 155 2001年9月
20aRA-3 HIPERレーザー照射生成プラズマのアブレーション密度計測

藤岡慎介, 白神宏之, 錦野将元, 玉利洋平, 砂原淳, 重森啓介, 中井光男, 疇地宏, 山中龍彦, MT T GOグループ

日本物理学会講演概要集 56 ( 2 ) 155 - 155 2001年9月
20aRA-2 HIPER(高強度基礎実験装置)によるレイリー・テイラー不安定性の観測

境家達弘, 重森啓介, 疇地宏, 白神宏之, 中井光男, 錦野将元, 越智義浩, 西村博明, 西原功修, 砂原淳, 高部英明, 長友英夫, 宮永憲明, 山中龍彦, MT T GOグループ

日本物理学会講演概要集 56 ( 2 ) 154 - 154 2001年9月
高時空分解X線画像計測によるレーザー照射高エネルギー密度プラズマのダイナミクス

白神宏之, 藤岡慎介, 玉利洋平, 境家達弘, 錦野将元, 重森啓介, 中井光男, 畦地宏

映像情報メディア学会技術報告 25 ( 40 ) 7 - 12 2001年6月
高時空分解X線画像計測によるレーザー照射高エネルギー密度プラズマのダイナミクス

白神宏之, 藤岡慎介, 玉利洋平, 境家達弘, 錦野将元, 重森啓介, 中井光男, 畦地宏

電子情報通信学会技術研究報告. EID, 電子ディスプレイ 101 ( 118 ) 7 - 12 2001年6月
28pWD-1 レーザー核融合における超高密度圧縮と局所加熱

疇地宏, 白神宏之, 中井光男, 宮永憲明, 西村博明, 西原功修, 三間圀興, 山中龍彦

日本物理学会講演概要集 56 ( 1 ) 187 - 187 2001年3月
28pWD-8 X線分光による爆縮コアプラズマ内部の温度、密度勾配計測

越智義浩, 藤田和久, 深尾光博, 砂原淳, 西村博明, 白神宏之, 中井光男, 宮永憲明, 疇地宏, 山中龍彦, Golovkin I., Mancini R. C., Butzbach R., Uschmann I., Forster E., Lee R. W.

日本物理学会講演概要集 56 ( 1 ) 189 - 189 2001年3月
28pWD-6 X線半影法を用いたレーザー照射ターゲットの密度計測

藤岡慎介, 白神宏之, 錦野将元, 重森啓介, 中井光男, 疇地宏, 山中龍彦, GOグループ, Tグループ, MTグループ

日本物理学会講演概要集 56 ( 1 ) 189 - 189 2001年3月
28pWD-5 短波長レイリー・テイラー不安定性の観測

境家達弘, 松岡正明, 重森啓介, 疇地宏, 中井光男, 泉信彦, 村井健介, 錦野将元, 宮永憲明, 山中龍彦, MTグループ, GOグループ, Tグループ

日本物理学会講演概要集 56 ( 1 ) 188 - 188 2001年3月
28pWD-3 HIPERレーザーを用いた流体不安定性実験の現状

重森啓介, 疇地宏, 白神宏之, 中井光男, 宮永憲明, 西村博明, 藤田和久, 越智義浩, 錦野将元, 藤岡慎介, 境家達弘, 玉利洋平, 中塚正大, 西原功修, 山中龍彦, レーザー, 計測, ターゲットグループ

日本物理学会講演概要集 56 ( 1 ) 188 - 188 2001年3月
28pWD-2 2000 x Liquid DensityのDT爆縮コアは達成可能か?

白神宏之, 中井光男, 疇地宏, 西原功修, 高部英明, 山中龍彦

日本物理学会講演概要集 56 ( 1 ) 188 - 188 2001年3月
29pZF-12 レーザー爆縮コアプラズマの温度密度X線分光診断の開発

深尾光博, 越智義浩, 藤田和久, 砂原淳, 西村博明, 白神宏之, 中井光男, 宮永憲明, 疇地宏, 山中龍彦, Mancini R., Golovkin I., Butzbach R., Uschmann I., Foerster E., Lee R.W.

日本物理学会講演概要集 56 ( 1 ) 130 - 130 2001年3月
22aSH-11 相対論的宇宙ジェットにおける最大電流

本田満, 佐藤康子

日本物理学会講演概要集 56 ( 0 ) 29 - 29 2001年
22aSH-12 活動銀河ジェットにおける超高エネルギー粒子加速

佐藤康子, 本田満

日本物理学会講演概要集 56 ( 0 ) 29 - 29 2001年
28aYP-13 高速点火核融合 : 高密度プラズマ中の高エネルギー電子輸送に関する研究

千徳靖彦, 三間圀興, 本田満, 盛政明, 西原功修, 田中一夫, 児玉了祐, 北川米善, Kaw P

日本物理学会講演概要集 56 ( 0 ) 185 - 185 2001年
HIPERレーザーを用いた流体不安定性実験の現状

重森啓介, あぜ地宏, 白神宏之, 中井光男, 宮永憲明, 西村博明, 藤田和久, 越智義浩, 山中龍彦

日本原子力学会秋の大会予稿集 2001 2001年
29pB05 レーザー核融合におけるレーリー・テーラー不安定性の理解に向けたレーザー照射生成プラズマの密度構造計測(慣性核融合)

藤岡慎介, 白神宏之, 錦野将元, 玉利洋平, 境家達弘, 砂原淳, 重森啓介, 中井光男, 疇地宏, 山中龍彦

プラズマ・核融合学会年会予稿集 ( 18 ) 161 - 161 2001年
29pB04 HIPER(高強度基礎実験装置)によるレイリー・テイラー不安定性の観測(慣性核融合)

境家達弘, 疇地宏, 白神宏之, 中井光男, 重森啓介, 錦野将元, 藤岡慎介, 玉利洋平, 金井祐樹, 越智義浩, 西村博明, 西原功修, 砂原淳, 高部英明, 長友英夫, 宮永憲明, 山中龍彦, MT T, GOグループ MT, T, GOグループ

プラズマ・核融合学会年会予稿集 ( 18 ) 161 - 161 2001年
28pWD-4 レーザー照射ターゲットにおけるシャインスルーによる内部初期擾乱の成長の観測

錦野将元, 西村博明, 境家達弘, 重森啓介, 中井光男, 疇地宏, 山中龍彦, MTグループ, GOグループ, Tグループ, 白神宏之, 藤田和久, 深尾光博, 寳地卓, 藤岡慎介, 越智義浩, 宮永憲明, 長井圭治

日本物理学会講演概要集 56 ( 0 ) 188 - 188 2001年
Time-resolved ten-channel monochromatic imaging of inertial confinement fusion plasmas

Uschmann, I, K Fujita, Niki, I, R Butzbach, H Nishimura, J Funakura, M Nakai, E Forster, K Mima

APPLIED OPTICS 39 ( 31 ) 5865 - 5871 2000年11月
実験デモ

小林達生, 水渡嘉一, 清水克哉, コバヤシタツオ, スイトカイチ, シミズカツヤ

大阪大学低温センターだより 112 19 - 22 2000年10月
23aWE-3 時間的に変化するレーザー照射パターンによるインプリント

金井祐樹, 中井光男, 畦地宏, 宮永憲明, 錦野将元, 松岡正明, 泉信彦, 重森啓介, 永谷拓郎, 西原功修, 山中龍彦

日本物理学会講演概要集 55 ( 2 ) 162 - 162 2000年9月
23aWE-6 X線半影撮像法を用いたレーザー照射ターゲットの加速段階におけるアブレーション密度計測法の開発

藤岡慎介, 白神宏之, 錦野将元, 藤田和久, 重森啓介, 中井光男, 畦地宏, 山中龍彦, T GO MTグループ

日本物理学会講演概要集 55 ( 2 ) 163 - 163 2000年9月
23aWE-5 HIPERレーザーを用いたレイリー・テイラー不安定性線形成長率の観測

境家連弘, 松岡正明, 重森啓介, 喘地宏, 中井光男, 泉信彦, 村井健介, 錦野将元, 宮永憲明, 砂原淳

日本物理学会講演概要集 55 ( 2 ) 163 - 163 2000年9月
23aWE-4 間接/直接ハイブリッド方式におけるX線予備照射による予備膨張プラズマの計測

錦野将元, 白神宏之, 松岡正明, 藤岡慎介, 重森啓介, 中井光男, 畦地宏, 宮永憲明, 山中龍彦, Mt Go Tグループ

日本物理学会講演概要集 55 ( 2 ) 162 - 162 2000年9月
23aB-5 激光XII号HIPERプロジェクト報告IV : 平板ターゲット加速実験

中井光男, 疇地宏, 白神宏之, 重森啓介, 錦野将元, 松岡正明, 境家達弘, 金井裕樹, 藤岡慎介, 藤田和久, 西村博明, 前川修, 中塚正大, 金辺忠, 乗松孝好, 西原功修, 高部英明, 三間圀興, 山中龍彦, HIPER-pro, T, MT-グループ

日本物理学会講演概要集 55 ( 1 ) 148 - 148 2000年3月
23aB-4 激光XII号HIPERプロジェクト報告III : X線プローブ計測

西村博明, 藤岡慎介, 藤田和久, 金辺忠, 松尾悟志, 秋月寿, 高橋涼介, 乗松孝好, 宮永憲明, 中塚正大, 山中龍彦, 大道博行, HIPER-pro, T, MT-グループ, 中井光男, 疇地宏, 白神宏之, 重森啓介, 錦野将元, 松岡正明, 境家達弘

日本物理学会講演概要集 55 ( 0 ) 148 - 148 2000年
23aWE-9 核融合と基礎科学の新しい道具としてのハイパーレーザー : 建設の目的と到達点

疇地宏, 中塚正大, 西原功修, 高部英明, 三間圀興, 山中龍彦, 白神宏之, 宮永憲明, 中井光男, 藤田和久, 西村博明, 大道博之, 金辺忠, 藤田尚徳

日本物理学会講演概要集 55 ( 0 ) 164 - 164 2000年
Experimental Studies on Hydrodynamic Instability of Direct-Drive Laser Fusion on GEKKO (]G0010[)(]G0002[)

Proc. of 18th IAEA Fusion Energy Conference IAEA-CN-77/IFP/15,2000 2000年
29pB21P レーザー照射ターゲットにおける表面・裏面擾乱の相互作用(ヘリカル2/慣性核融合/新概念)

重森啓介, 疇地宏, 中井光男, 永谷拓胡, 石崎龍一, 西原功修, 長友英夫, 三間圀興

プラズマ・核融合学会年会予稿集 ( 17 ) 194 - 194 2000年
B. レーザー装置

高瀬智裕, 中井貞雄, 松岡孝義, 興雄司, 前田三男, 田上潤一, 和泉直樹, 桑原裕一, 窪寺昌一, 佐々木亘, シャルマラリット B, 竹中祐司, 吉田英次, 古田啓介, 小島哲夫, 中村孝一郎, 畑中孝明, 柴崎浩樹, 谷内哲夫, 伊藤弘昌, 今野進, 藤川周一, 安井公浩, 中井光男, 藤井剛, 熊谷寛, 緑川克実, 小原實, 松原健祐, 田中歌子, 今城秀司, 早坂和弘, 大向隆三, 占部伸二, 藤田尚徳, 渡辺昌良, 宮崎和彦, 高橋照薫, 田村剛, 浜田敏裕, 盧建仁, 金南成, 関口宏, 鈴木良和, 戸川拓哉, 宮永憲明, 石田寿則, 森田浩之, 沖野圭司, 武中浩郎, 窪田恵一, 鷲尾邦彦, 山根毅士, 滝沢明彦, 岩間誠司, 山村史彦, 中塚正大, 木村信二, 中島康裕, 木村美紀雄, 伊沢孝男, 渡辺博文, 尾松孝茂, 立田光廣, 桶谷能史, 平井大三郎, 山口滋, 富永英一, 南野憲三, 砂子克彦, 藤岡知夫, 遠藤雅守, 森平敏行, 大前吾一, 八木隆志, 大原忍, 山口尊鏡, 杉本大地, 藤野正志, 今井一宏, 川瀬晃道, 南出泰亜, 佐藤篤, 和田智之, 小野晋吾, 劉子安, Huang K. F., 潘犀霊, 片岡直紀, 菅博文, 板垣素也, 内野喜一郎, 村岡克紀, 高橋昭彦, 岡田龍雄, 堀司, 寺島克知, 住谷明, 榎波龍雄, 溝口計, 宮島博文, 若林理, 石井健, 太田毅, 大部彩子, 久保博一, 渡邊隆之, 塩耕史, 永井伸治, 落石好紀, 西坂敏博, 秋山靖裕, 神崎武司, 植野能史, 岩田泰明, 藤本准一, 柿崎弘司, 斎藤隆志, 三橋健一, 新井基尋, 多田昭史, 対馬弘朗, 佐々木陽一, 西畑実, 五十嵐龍志, 堀田和明, 中島耕作, 田部芳孝, 横谷篤至, 黒澤宏, 長友信親, 高浦真琴, 白井隆宏, 玉木文武, 内山貴之, 山浦隆宏, 渡邊聖之, 北村周一, 日野佐八郎, 佐久川貴志, 家田正彦, 戸田雅之, 北寄崎薫, 高田昇, 花倉満, 書馬輝夫, 羽場方紀, 佐藤三郎, 山部長兵衛, 森啓, 鈴木薫, 中田順治, 嘉成和孝, 清水幸喜, 谷脇学, 伊與田光宏, 川嶋利幸, 金辺忠, 岡田康光, 黒田俊宏, 玉置善紀, 宮本昌浩, 佐々木光夫, 寺田昌弘, 加藤義則, 佐藤雅夫, 内藤真哉, 家久信明, 軽部規夫, 関田仁志, 白鳥明, 笠松直史, 住吉哲実, 高田淳, Rutherford Todd, Tulloch Bill, Byer Robert, 天野壮, 望月孝曇, 宮本修治, 安東愛之輔, 細野和彦, 森嶋大樹, 福垣啓介, 湯浅広士, 下浦厚志, 渡部明, 依田琢也, 佐藤寿彦, 茂木哲哉, 奥野雅史, 張樹葵, 藤田雅之, 阪部周二, 山中千代衛, 西田直人, 挾間寿文, Jiang Jie, 児玉了祐, 加瀬貞二, 角谷実, 浅葉薫, 山川孝一, 河仲準二, 西岡一, 上原昇, Kandasamy Ranganathan, 植田憲一, 松岡伸一, 中野文彦, 青山誠, 赤羽温, 佐野英作, 久保亮一, 文雅司, 今崎一夫, 中尾直也, 山中正宣, 大東延久, 綱脇恵章, 永井昭夫, 三間圀興, 車信一郎, 柾木靖博, 北野一成, 草場博, 後藤道夫, 井上隆博, 井澤靖和, 劉振林, 島村清史, 中野憲司, Na Mujilatu, 福田承生, 小関俊政, 大竹秀幸, 猿倉信彦, 吉浦豪, 苣木雄一

レーザー研究 28 ( 0 ) 29 - 43,49 2000年
26pYF-10 多段密度フォームハイブリッドターゲットによるインプリントの緩和

西村博明, 中井光男, 大西直文, 錦野将元, 松岡正明, 泉信彦, 白神宏之, 宮永憲明, 長井圭治, 乗松孝好, 高部英明, 畦地宏, 山中龍彦, GO.T.Mtセクション

日本物理学会講演概要集 54 ( 2 ) 173 - 173 1999年9月
26pYF-9 初期インプリント抑制のX線予備照射強度依存性

錦野将元, 白神宏之, 畦地宏, 中井光男, 宮永憲明, 松岡正明, 重森啓介, 永谷拓朗, 本田博史, 西村博明, 大西直文, 高部英明, 三間圀興, 山中龍彦, Mt.Go.Tグループ

日本物理学会講演概要集 54 ( 2 ) 172 - 172 1999年9月
26pYF-8 レーザー噴出加速ターゲットの安定性に関する基礎実験 : overview

中井光男, 畦地宏, 宮永憲明, 西村博明, 白神宏之, 泉信彦, 錦野将元, 松岡正明, 藤岡慎介, 部谷学, 藤田和久, 船倉治朗, 越智義浩, 深尾光博, 重森啓介, 永谷拓朗, 藤田尚徳, 乗松孝好, 前川修, 長友英夫, 高部英明, 西原功修, 山中龍彦, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ

日本物理学会講演概要集 54 ( 2 ) 172 - 172 1999年9月
26pYF-7 時間的に変化するレーザー照射パターンによるインプリントの測定

金井祐樹, 中井光男, 畦地宏, 宮永憲明, 錦野将元, 松岡正明, 泉信彦, 重森啓介, 永谷拓郎, 西原功修, 山中龍彦

日本物理学会講演概要集 54 ( 2 ) 172 - 172 1999年9月
26pYF-13 モアレ干渉法による短波長レーリー・テーラー不安定性の計測

松岡正明, 畦地宏, 中井光男, 泉信彦, 村井健介, 錦野将元, 境家達弘, 宮永憲明

日本物理学会講演概要集 54 ( 2 ) 173 - 173 1999年9月
26pYF-12 半影撮像法を用いた短波長擾乱成長の時間分解計測法の開発

藤岡慎介, 部谷学, 白神宏之, 錦野将元, 宮永憲明, 中井光男, 畦地宏, 山中龍彦, MT.T.GOグループ

日本物理学会講演概要集 54 ( 2 ) 173 - 173 1999年9月
30p-XH-10 X線予備照射によるインプリントの抑制と予備膨張プラズマの制御

錦野将元, 白神宏之, 宮永憲明, 西村博明, 泉信彦, 部谷学, 藤田和久, 越智義浩, 仁木勇, 藤岡慎介, 疇地宏, 中井光男, 重森啓介, 乗松孝好, 高木勝, 長井圭治, 本田博史, 大西直文, 高部英明, 山中龍彦, 三間圀興, Mt Go Tグループ

日本物理学会講演概要集 54 ( 1 ) 818 - 818 1999年3月
30p-XH-5 軟X線反射を利用したアブレーション密度の測定方法の検討

藤井秀明, 疇地宏, 中井光男, 西村博明

日本物理学会講演概要集 54 ( 1 ) 817 - 817 1999年3月
30p-XH-4 時間的に変化するレーザ照射パターンによるインプリントの測定

松岡正明, 疇地宏, 中井光男, 宮永憲明, 重森啓介, 永谷拓朗, 山中龍彦

日本物理学会講演概要集 54 ( 1 ) 817 - 817 1999年3月
30p-XH-12 HIPER プロジェクトそのII レーザー照射一様性

宮永憲明, 椿本孝治, 末田敬一, 疇地宏, 白神宏之, 金辺忠, 実野孝久, 藤田尚徳, 中井光男, 西村博明, 藤田和久, 中塚正大, 山中龍彦, 三間圀興

日本物理学会講演概要集 54 ( 1 ) 819 - 819 1999年3月
30p-XH-6 レーザー加速衝突プラズマの衝撃波伝搬観測 : 実験室宇宙物理の試み

養永光, 西村博明, 高部英明, 依田嘉明, 長友英夫, 砂原淳, 疇地宏, 中井光男, 児玉了祐, 藤田和久, 乗松孝好, 金孝根, 中塚正大, 三間圀興

日本物理学会講演概要集 54 ( 1 ) 817 - 817 1999年3月
24aB6 モアレ干渉法による短波長レーリー・テーラー不安定性の計測(超伝導/慣性核融合)

松岡正明, 〓地宏, 中井光男, 泉信彦, 村井健介, 錦野将元, 境家達弘, 宮永憲明

プラズマ・核融合学会年会予稿集 70 ( 1 ) 637 - 641 1999年1月
25pYF-5 フォームバッファターゲットの高利得ターゲット設計

武田哲史, 三間圀興, 畦地宏, 西村博明, 長友英夫, 西口彰夫, 砂原淳, 大西直文, 本田満

日本物理学会講演概要集 54 ( 0 ) 156 - 156 1999年
26pYF-4 HIPER プロジェクトの現状と実験計画

畦地宏, 西原功修, 高部英明, 三間圀興, 山中龍彦, 藤田和久, 白神宏之, 金辺忠, 宮永憲明, 藤田尚徳, 中井光男, 西村博明, 大道博之, 中塚正大

日本物理学会講演概要集 54 ( 0 ) 1999年
Formation of Initial Perturbation of Rayleigh-Taylor Instability in Supernovae and Laser-Irradiated Targets-Is there any Similarity?

The Astrophysical Journal Supplement Series 127 219 1999年
HIPERプロジェクトその1 高利得ターゲットの安定性の解析

あぜ地宏, 永谷拓朗, 中井光男, 宮永憲明, 白神宏之, 西村博明, 金辺忠, 藤田和久, 三間くに興

日本物理学会講演概要集 54 ( 1 ) 1999年
31p-XH-13 フォームバッファターゲットの爆縮シミュレーション

武田哲史, 三間圀興, 長友英夫, 西口彰夫, 西村博明, 本田満

日本物理学会講演概要集 54 ( 0 ) 839 - 839 1999年
2)単色X線高速フレームカメラ(〔情報センシング研究会情報ディスプレイ研究会〕合同)(画像変換技術)

仁木勇, 藤田和久, 西村博明, 中井光男, プーツバッハランドルフウシュマンインゴ

映像情報メディア学会誌 : 映像情報メディア 52 ( 11 ) 1598 - 1598 1998年11月
27a-F-3 レーザー直接照射爆縮における流体不安定性の初期問題

中井光男, 宮永憲明, 疇地宏, 重森啓介, 川崎嗣雄, 永谷拓朗, 大貫大輔, 西村博明, 白神宏之, 錦野将元, 兒玉了祐, 前川修, 石崎龍一, 西口彰夫, 長友英夫, 高部英明, 西原功修, 山中龍彦, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ

日本物理学会講演概要集 53 ( 2 ) 962 - 962 1998年9月
27a-F-6 間接/直接ハイブリッド方式によるレーザー爆縮

錦野将元, 白神宏之, 宮永憲明, 西村博明, 泉信彦, 部谷学, 藤田和久, 越智義浩, 仁木勇, 藤岡慎介, 疇地宏, 中井光男, 重森啓介, 本田博史, 乗松孝好, 高木勝, 長井圭治, 高部英明, 山中龍彦, 三間圀興, Mtグループ, GOグループ, Tグループ

日本物理学会講演概要集 53 ( 2 ) 963 - 963 1998年9月
レーザープラズマ発生X線を用いた時間分解X線ラジオグラフィーとその流体力学実験への応用

重森啓介, 中井光男, 白神宏之

レーザー学会研究会報告 = Reports on the Topical meeting of the Laser Society of Japan 252 23 - 28 1998年5月
1p-L-6 SiK吸収端シフトを用いた固体プラズマの密度観測

越智義浩, 中井光男, 西村博明, 重森啓介, 永谷拓朗, 畦地宏, 白神宏之, 三間圀興, 計測・レーザー, ターゲットグループ

日本物理学会講演概要集 53 ( 1 ) 767 - 767 1998年3月
31a-YR-2 X線予備照射によるインプリントの抑制の解析

錦野将元, 白神宏之, 畦地宏, 中井光男, 川崎嗣雄, 宮永憲明, 重森啓介, 永谷拓朗, 本田博史, 西村博明, 高部英明, 山中龍彦, 三間圀興, Mt Go Tグループ

日本物理学会講演概要集 53 ( 1 ) 813 - 813 1998年3月
31a-YR-5 モアレ干渉法による短波長レーリー・テーラー不安定性の観測

松岡正明, 畦池宏, 中井光男, 泉信彦, 重森啓介, 永谷拓朗, 宮永憲明, 山中龍彦

日本物理学会講演概要集 53 ( 1 ) 814 - 814 1998年3月
31a-YR-4 レーリー・テーラー不安定性のモード結合

川崎嗣雄, 宮永憲明, 畦地宏, 中井光男, 西村博明, 白神宏之, 重森啓介, 永谷拓朗, 錦野将元, 三間圀興, MT GO Tグループ

日本物理学会講演概要集 53 ( 1 ) 814 - 814 1998年3月
31a-YR-3 希薄波による裏面擾乱のフィードアウト

重森啓介, 畦地宏, 中井光男, 永谷拓朗, 石崎龍一, 西原功修, 長友英夫, 高部英明, 三間圀興, レーザー, 計測, ターゲットグループ

日本物理学会講演概要集 53 ( 1 ) 813 - 813 1998年3月
27a-F-4 レーザー直接照射ターゲットにおけるレーリー・テーラー非線形成長の観測II

永谷拓朗, 高部英明, 西口彰夫, 三間圀興, レーザーG, 計測G, ターゲットG, 重森啓介, 疇地宏, 中井光男, 宮永憲明, 錦野将元, 白神宏之, 長友英夫, 本田満

日本物理学会講演概要集 53 ( 0 ) 962 - 962 1998年
Fundamental Experiments on Hydrodynamic Instability in Direct-Drive Laser Fusion at GEKKOX(]G0002[)

Proc. of 17th IAEA Fusion Energy Conference IAEA-CN-69/IFP/06 1998年
31a-YR-1 レーザー照射非一様性のインプリント

中井光男, 白神宏之, 錦野将元, 兒玉了祐, 前川修, 本田満, 石崎龍一, 西口彰夫, 高部英明, 西原功修, 山中龍彦, 宮永憲明, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ, 疇地宏, 重森啓介, 川崎嗣雄, 小坂宜吉, 永谷拓郎, 大貫大輔, 西村博明

日本物理学会講演概要集 53 ( 0 ) 813 - 813 1998年
31a-YR-9 非局所熱伝導モデルによる高利得ターゲットの設計

武田哲史, 西口彰夫, 本田満, 三間圀雄, 畦地宏

日本物理学会講演概要集 53 ( 0 ) 815 - 815 1998年
Shigemori et al. Reply

K. Shigemori, H. Azechi, M. Nakai, H. Takabe, K. Mima

Physical Review Letters 80 ( 15 ) 3415 1998年
Shock Waves and Hydrodynamic Instabilities-Laser Plasmas.

Journal of Plasma and Fusion Research 74 ( 11 ) 1283 1998年
単色X線フレーミングカメラの開発 (大阪大学レーザー核融合研究センターS)

西村博明, 藤田和久, 仁木勇, 中井光男, USCHMANN I, FOERSTER E

大阪大学レーザー核融合研究センター共同研究成果報告書 1998 1998年
衝撃波、流体不安定-レーザープラズマ

プラズマ・核融合学会誌 74 ( 11 ) 1283 1998年
単色X線高速フレームカメラ

仁木勇, 藤田和久, 西村博明, 中井光男, USCHMANN I, BUTZBACH R, FOERSTER E

電気学会光・量子デバイス研究会資料 OQD-98 ( 17-30 ) 1998年
単色X線フレーミングカメラの開発とこれを用いた爆縮コアプラズマ診断

仁木勇, 藤田和久, 西村博明, USCHMANN I, FOERSTER E, 中井光男, 越智義浩, 砂原淳, 三間国興

日本物理学会講演概要集 53 ( 2 ) 1998年
計測器タイミング測定のための2パルス時間差測定表示装置の開発

前川修, 中井光男, 山中龍彦, 三間圀興

電気学会研究会資料. IM, 計測研究会 1997 ( 85 ) 7 - 11 1997年11月
9)電磁界偏向型高速X線フレーミングカメラの開発(〔情報センシング研究会情報ディスプレイ研究会〕)

田島宏邦, 榛木敬仁, 中井光男, 畴地宏, 三間圀興

映像情報メディア学会誌 : 映像情報メディア 51 ( 10 ) 1653 - 1653 1997年10月
6a-YM-2 モアレ縞法による短波長レーリー・テーラー不安定性の観測

疇地宏, 中井光男, 泉信彦, 松岡正明, 永谷拓朗, 重森啓介, 宮永憲明, 山中龍彦

日本物理学会講演概要集 52 ( 2 ) 922 - 922 1997年9月
6a-YM-8 リップル衝撃波による不安定性の理論解析

石崎龍一, 西原功修, Wouchuk J.G, 重森啓介, 中井光男, 畦地宏, 宮永憲明, 西口彰夫, 三間圀興

日本物理学会講演概要集 52 ( 2 ) 924 - 924 1997年9月
6a-YM-6 X線予備照射時間の変化によるレーザー照射不均一性インプリントの緩和

錦野将元, 白神宏之, 川崎嗣雄, 宮永憲明, 重森啓介, 永谷拓朗, 疇地宏, 中井光男, 本田博史, 西村博明, 高部英明, 山中龍彦, 三間圀興, Mt Go, T Groups

日本物理学会講演概要集 52 ( 2 ) 923 - 923 1997年9月
6a-YM-5 レーザー駆動爆縮における照射不均一のインプリント : マルチモード

川崎嗣雄, 宮永憲明, 疇地宏, 中井光男, 西村博明, 白神宏之, 重森啓介, 永谷拓朗, 錦野将元, 末田敬一, 西口彰夫, 遠藤琢磨, 三間圀興, Mt Go T Groups

日本物理学会講演概要集 52 ( 2 ) 923 - 923 1997年9月
6a-YM-3 レーザー駆動爆縮における照射不均一のインプリント : 不均一衝撃波の観測

大貫大輔, 西村博明, 白神宏之, 疇地宏, 中井光男, 宮永憲明, 重森啓介, 永谷拓朗, 川崎嗣雄, 錦野将元, 村上匡且, 高部英明, 西原功修, 三間圀興, レーザーターゲット, 計測, シミュレーショングループ

日本物理学会講演概要集 52 ( 2 ) 922 - 922 1997年9月
30p-YG-12 X線予備照射によるレーザー照射不均一性インプリントの緩和

錦野将元, 白神宏之, 疇地宏, 中井光男, 宮永憲明, 西村博明, 重森啓介, 川崎嗣雄, 高部英明, 三間圀興, Mt Go Tグループ

日本物理学会講演概要集 52 ( 1 ) 864 - 864 1997年3月
30P-YG-7 MCPゲート型高時間分解能中性子検出器の開発

藤本和彦, 宮永憲明, 中井光男

日本物理学会講演概要集 52 ( 1 ) 863 - 863 1997年3月
29p-YG-4 非一様レーザー吸収によるリップル衝撃波の伝搬

石崎龍一, 西口彰夫, 三間圀興, 西原功修, J.G Wouchuk, 松井伸幸, 本田満, 中井光男, 重森啓介, 畦地宏, 宮永憲明

日本物理学会講演概要集 52 ( 0 ) 853 - 853 1997年
29p-YG-5 統合爆縮コードの開発(1) : 全体像と計画

高部英明, 長友英夫, 加藤進, 大西直文, 鳴尾秀二, 砂原淳, 本田満, 畦地宏, 三間國興

日本物理学会講演概要集 52 ( 0 ) 853 - 853 1997年
30p-YG-1 激光XII号部分コヒーレント光による均一照射爆縮コア性能

白神宏之, 乗松孝好, 高木勝, 藤田尚徳, 金邊忠, 實野孝久, 中塚正大, 本田満, 砂原淳, 高部英明, 長友英夫, 畦地宏, 西原功修, 三間圀興, レーザー・ターゲット・シミュレーション計測グループ, 宮永憲明, 西村博明, 中井光男, 泉信彦, 田中和夫, 兒玉了祐, 山中龍彦

日本物理学会講演概要集 52 ( 0 ) 861 - 861 1997年
31p-YG-6 レーザー核融合高速点火方式予備実験(プリドリリング)1

児玉了祐, 北川米喜, 加藤義章, 三間圀興, 村井健介, Babee T, DaShilva L, Weber F, 田中和夫, 高橋謙次郎, 橋本浩幸, 岡田一範, 原元彦, 大村武志, 永谷拓郎, 中井光男

日本物理学会講演概要集 52 ( 0 ) 876 - 876 1997年
31p-YG-3 レーザープラズマにおける相対論的電子輸送への磁場の影響

本田満, 三間圀興, 西口彰夫

日本物理学会講演概要集 52 ( 0 ) 875 - 875 1997年
31p-YG-2 高速点火へのアプローチ

田中和夫, 北川米喜, 兒玉了祐, 阪部周二, 實野孝久, 白神宏之, 高部英明, 大道博行, 中井光男, 長友英夫, 西村博明, 井沢靖和, 乗松孝好, 村上匡且, 藤田尚徳, 宮永憲明, 三間圀興, レーザー・ターゲット, 計測グループ, 加藤義章, 中井貞雄, 中塚正大, 西原功修, 山中龍彦, 畦地宏, 金邊忠

日本物理学会講演概要集 52 ( 0 ) 875 - 875 1997年
30p-YG-13 フォームハイブリッド型ターゲットによる初期インプリントの緩和

西村博明, 大貫大輔, 目黒貴一, 村上匡且, 高部英明, 西原功修, 三間圀興, レーザーターゲット, 白神宏之, 畦地宏, 中井光男, 宮永憲明, 重森啓介, 永谷拓朗, 川崎嗣雄, 錦野将元

日本物理学会講演概要集 52 ( 0 ) 864 - 864 1997年
30p-YG-11 レーザー駆動爆縮におけるレーザー照射不均一によるターゲット初期インプリント

中井光男, 目黒貴一, 錦将元, 兒玉了祐, 松岡伸一, 前川修, 本田満, 石崎龍一, 遠藤琢磨, 西口彰夫, 高部英明, 宮永憲明, 西原功修, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ, 疇地宏, 重森啓介, 西村博明, 永谷拓朗, 川崎嗣雄, 大貫大輔, 白神宏之

日本物理学会講演概要集 52 ( 0 ) 864 - 864 1997年
30p-YG-10 非局所熱輸送によるレイリー・テーラー線形成長率の抑制効果

重森啓介, 永谷拓朗, 疇地宏, 中井光男, 本田満, 宮永憲明, 高部英明, 山中龍彦, 三間圀興

日本物理学会講演概要集 52 ( 0 ) 864 - 864 1997年
6a-YM-1 レーザー直接照射ターゲットにおけるレーリー・テーラー非線形成長の観測

重森啓介, 高部英明, 西口彰夫, 三間圀興, レーザー, 計測, ターゲットグループ, 永谷拓朗, 疇地宏, 中井光男, 宮永憲明, 錦野将元, 白神宏之, 本田満, 長友英夫

日本物理学会講演概要集 52 ( 0 ) 922 - 922 1997年
6p-YM-4 レーザー生成高密度プラズマの相対論的Fokker-Planckシミュレーション

本田満, 三間圀興, 千穂靖彦, Ruhl H, 長友英夫, 武田哲史, 西口彰夫

日本物理学会講演概要集 52 ( 0 ) 928 - 928 1997年
6a-YM-7 フォームハイブリッドターゲットにおけるエネルギー輸送

西村博明, 大貫大輔, 目黒貴一, 村上匡且, 高部英明, 西原功修, 三間圀興, レーザーターゲット, 白神宏之, 畦地宏, 中井光男, 宮永憲明, 重森啓介, 永谷拓朗, 川崎嗣雄, 錦野将元

日本物理学会講演概要集 52 ( 0 ) 923 - 923 1997年
6a-YM-4 レーザー駆動爆縮におけるレーザー照射不均一によるターゲット初期インプリント : 単一空間モードインプリント

中井光男, 白神宏之, 錦将元, 児玉了祐, 前川修, 本田満, 石崎龍一, 西口彰夫, 高部英明, 西原功修, 山中龍彦, 宮永憲明, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ, 畦地宏, 重森啓介, 川崎嗣雄, 小坂宣吉, 永谷拓朗, 大貫大輔, 西村博明

日本物理学会講演概要集 52 ( 0 ) 923 - 923 1997年
電磁界偏向型高速X線フレーミングカメラの開発

田島宏邦, 榛木敬仁, 中井光男, 疇地宏, 三間圀興

映像情報メディア学会技術報告 21 ( 0 ) 49 - 54 1997年
3)時間分解X線ラジオグラフィーとその流体力学実験への応用([情報入力研究会情報ディスプレイ研究会]合同)

重森啓介, 畦地宏, 中井光男, 宮永憲明, 児玉了祐, 山中龍彦, 三間圀興

テレビジョン学会誌 50 ( 9 ) 1416 - 1416 1996年9月
ビームパワーインバランスによる照射不均一性のX線画像による計測

本田博史, 西村博明, 宮本修治, 中井光男, 近藤克昭, 椿本孝治, 宮永憲明, 白神宏之, 疇地宏, 西原功修, 三間圀興, MT-Group, GU-Group, T-Group

日本物理学会講演概要集. 秋の分科会 1996 ( 4 ) 219 - 219 1996年9月
多機能紫外線プローブシステムを用いたプラズマ密度計測

橋本浩幸, 田中和夫, 中井光男, 兒玉了祐, 高橋謙次郎, 岡田一範, 三間圀興

日本物理学会講演概要集. 秋の分科会 1996 ( 4 ) 210 - 210 1996年9月
直接・間接混成(ハイブリッド)方式による照射不均一性の緩和 : 低密度フォーム型ハイブリッド

Nishimura H., Shiraga H., Azechi H., Nakai M., Miyanaga N., Shigemori K., Nagaya T., Nishikino T., Ohnuki D., Meguro K., Murakami M., Takabe H., Nishihara K., Mima K., LaserGroups, TargetGroups, DiagnosticsGroups, Simulation Groups

日本物理学会講演概要集. 秋の分科会 1996 ( 4 ) 217 - 217 1996年9月
激光XII号部分コヒーレント光による爆縮実験

白神宏之, 疇地宏, 宮永憲明, 西村博明, 中井光男, 田中和夫, 兒玉了祐, 乗松孝好, 高木勝, 藤田尚徳, 金邊忠, 實野孝久, 中塚正大, 高部英明, 西原功修, 山中龍彦, 三間圀興, レーザーグループ, ターゲットグループ, 計測グループ, シミュレーショングループ

日本物理学会講演概要集. 秋の分科会 1996 ( 4 ) 220 - 220 1996年9月
時間分解X線ラジオグラフィーとその流体力学実験への応用

重森啓介, 疇地宏, 中井光男, 宮永憲明, 児玉了祐, 山中龍彦, 三間圀興

テレビジョン学会技術報告 20 ( 36 ) 13 - 18 1996年6月
2p-YL-7 二次元Fokker-PlanckシミュレーションによるRayleigh-Taylor不安定性の解析II(2pYL プラズマ物理・核融合(レーザー(1)),プラズマ物理・核融合)

本田満, 三間圀興, 松井伸幸, 西口彰夫, 石崎龍一, 重森啓介, 中井光男, 疇地宏

日本物理学会講演概要集. 年会 51 ( 4 ) 198 - 198 1996年3月
レーリー・テーラー線形成長率の測定

目黒貴一, 重森啓介, 中井光男, 児玉了祐, 宮永憲明, 疇地宏

電気学会研究会資料. PST, プラズマ研究会 1996 ( 1 ) 11 - 19 1996年2月
2p-YL-8 レイリーテーラー線形成長率の測定(プラズマ物理・核融合(レーザー(1)))

重森啓介, 兒玉了祐, 三間圀興, 疇地宏, 中井光男, 宮永憲明, 本田満, 西口彰夫, 松井伸幸, 高部英明, 目黒貴一

日本物理学会講演概要集. 年会 51 ( 0 ) 198 - 198 1996年
3p-YL-8 直接・間接混成(ハイブリッド)型爆縮方式の研究(プラズマ物理・核融合(レーザー(3)))

西村博明, 乗松孝好, 高木勝, 高部英明, 砂原淳, 村上匡且, 西原功修, 三間圀興, Mt GS, 白神宏之, 遠藤琢磨, 大貫大輔, 本田博史, 畦地宏, 宮永憲明, 宮本修治, 中井光男

日本物理学会講演概要集. 年会 51 ( 0 ) 234 - 234 1996年
X線プレパルスによるレーザー照射不均一性インプリントの緩和(ハイブリッド方式)

白神宏之, 永谷拓朗, 大貫大輔, 村上匡且, 高部英明, 西原功修, 三間圀興, 西村博明, 中井光男, 宮永憲明, 疇地宏, 重森啓介, 錦野将元, 川崎嗣雄, 目黒貴一

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 216 - 216 1996年
レイリーテーラー線形成長率のパラメータ依存性

重森啓介, 高部英明, 山中龍彦, 三間圀興, レーザーグループ, 計測グループ, ターゲットグループ, 疇地宏, 中井光男, 本田満, 宮永憲明, 永谷拓朗, 川崎嗣雄, 錦野将元, 目黒貴一

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 215 - 215 1996年
レイリー-テイラー不安定性への非局所電子熱輸送の効果

本田満, 三間圀興, 西口彰夫, 重森啓介, 中井光男, 疇地宏

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 194 - 194 1996年
リップル衝撃波への状態方程式の効果

松井伸幸, 三間圀興, 本田満, 西口彰夫, 石崎龍一, 西原功修, 重森啓介, 疇地宏

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 193 - 193 1996年
レーザー駆動爆縮における照射不均一のインプリント : 単一空間モードインプリント

中井光男, 目黒貴一, 錦野将元, 兒玉了祐, 松岡伸一, 前川修, 本田満, 石崎龍一, 遠藤琢磨, 西口彰夫, 高部英明, 宮永憲明, 西原功修, 三間圀興, 計測グループ, レーザーグループ, ターゲットグループ, 疇地宏, 重森啓介, 西村博明, 永谷拓朗, 川崎嗣雄, 大貫大輔, 白神宏之

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 215 - 215 1996年
レーザー駆動爆縮における照射不均一のインプリント : 部分コヒーレント光の発散角の効果

川崎嗣雄, 大貫大輔, 目黒貴一, 錦野将元, 西口彰夫, 遠藤琢磨, 三間圀興, Mtグループ, Goグループ, Tグループ, 宮永憲明, 中井光男, 重森啓介, 疇地宏, 西村博明, 白神宏之, 本田満, 永谷拓朗

日本物理学会講演概要集. 秋の分科会 1996 ( 0 ) 216 - 216 1996年
3)マイクロチャンネルプレートを用いた高速ゲーティングX線駒撮りカメラの開発(〔情報入力研究会情報ディスプレイ研究会〕合同)

近藤克昭, 榛木敬仁, 三田博昭, 中井光男, 中井貞雄

テレビジョン学会誌 49 ( 11 ) 1552 - 1552 1995年11月
29p-R-1 部分コヒーレント光を導入した新激光XIIによる爆縮実験

畦地宏, 高部英明, 宮永憲明, 西村博明, 白神宏之, 中井光男, 乗松孝好, 金辺忠, 児玉了祐, 加藤義章, 中塚正大, 西原功修, 三間圀興, 山中龍彦, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1995 ( 4 ) 201 - 201 1995年9月
30a-R-6 格子像屈折率測定法による臨界密度以下のプラズマでのフィラメンテーションの計測

田中和夫, 中路晋一, 大西芳紀, 押鐘寧, 尾崎充律, 橋本浩幸, 中井光男, 児玉了祐, 西口彰夫, 高部英明, 三間圀興, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1995 ( 4 ) 216 - 216 1995年9月
30p-R-7 263nmイメージ及びx線イメージによるレーザー光吸収分布の観測

大西芳紀, 田中和夫, 村上匡且, 橋本浩幸, 畦地宏, 加藤義章, 中井貞雄, 三間圀興, M T GO グループ

日本物理学会講演概要集. 秋の分科会 1995 ( 4 ) 229 - 229 1995年9月
マイクロチャンネルプレートを用いた高速ゲーティングX線駒撮りカメラの開発

近藤克昭, 榛木敬仁, 三田博昭, 中井光男, 中井貞雄

電子情報通信学会技術研究報告. EID, 電子ディスプレイ 95 ( 114 ) 13 - 18 1995年6月
31a-YX-11 高精度激光XII号レーザーによる爆縮実験 : 爆縮ダイナミックス

西村博明, 本田博史, 藤田和久, 越智義浩, 中井光男, 近藤克昭, 榛木啓仁, 白神宏之, 重森啓介, 田中和夫, 大西芳紀, 尾崎充律, 児玉了祐, 前川修, 島田京子, 宮本昌浩, 園本竜也, 松下知広, 宮永憲明, 加藤義章, 高部英明, 三間圀興, 中井貞雄

日本物理学会講演概要集. 年会 50 ( 4 ) 1995年3月
31a-YX-7 高精度激光XII号による爆縮実験 : オーバービュー

疇地宏, 高部英明, 宮永憲明, 金辺忠, 乗松孝好, 西村博明, 白神宏之, 中井光男, 田中和夫, 児玉了祐, 実野孝久, 加藤義章, 中塚正大, 西原功修, 三間圀興, 井澤靖和, 山中龍彦, 中井貞雄

日本物理学会講演概要集. 年会 50 ( 4 ) 209 - 209 1995年3月
31a-YX-6 レーザー爆縮コアプラズマにおけるホットスパーク構造III : 燃料電子温度分布とコア形状

部谷学, 白神宏之, 中筋幹夫, 西原功修, 田中和夫, 山中龍彦, 加藤義章, 中井貞雄, GOグループ, Tグループ, MTグループ

日本物理学会講演概要集. 年会 50 ( 4 ) 208 - 208 1995年3月
31a-YX-3 2ωの高調波散乱光及びX線イメージによるレーザー光吸収分布測定

田中和夫, 大西芳紀, 尾崎充律, 村上匡且, 塚本雅裕, 中路晋一, 児玉了祐, 橋本浩幸, 畦地宏, 中井光男, 松下知広, 三間圀興, 加藤義章, 中井貞雄

日本物理学会講演概要集. 年会 50 ( 4 ) 207 - 207 1995年3月
レーザー爆縮コアプラズマにおけるホットスパーク構造

部谷学, 白神宏之, 宮永憲明, 西原功修, 田中和夫, 加藤義章, 山中龍彦, 中井貞雄, T M GODグループ

レーザー学会学術講演会年次大会講演予稿集 = Annual meeting, of the Laser Society of Japan digest of technical papers 15 217 - 217 1995年1月
高周波放電によるレーザー核融合クライオターゲットの均一化

石原昌宏, 乗松孝好, 井澤靖和, 中井貞雄

レーザー学会学術講演会年次大会講演予稿集 = Annual meeting, of the Laser Society of Japan digest of technical papers 15 128 - 128 1995年1月
29p-R-2 新激光における爆縮実験の解析

高部英明, 山中龍彦, 中井貞雄, 三間圀興, 畦地宏, 西村博明, 白神宏之, 竹内源, 砂原淳, 本田満, 山ケ城哲夫, 加藤義章

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 202 - 202 1995年
30a-R-13 ペタワットレーザーによる高速点火のターゲット設計

本田満, 宮本斉児, 加藤進, 西口彰夫, 三間圀興

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 219 - 219 1995年
30p-R-6 レーザープラズマの流体不安定性 6 : X線プレパルスによるインプリントの緩和

白神宏之, 重森啓介, 宮永憲明, 畦地宏, 中井光男, 目黒貴一, 遠藤琢磨, 高部英明, 三間圀興

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 229 - 229 1995年
30p-R-5 レーザープラズマの流体力学的不安定性 5 : 線形成長領域におけるレーリー・テーラー不安定性

目黒貴一, T グループ, GO グループ, 中井光男, 重森啓介, 畦地宏, 宮永憲明, 児玉了祐, 高部英明, 三間圀興, M グループ

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 228 - 228 1995年
30p-R-4 レーザープラズマの流体力学的不安定性 4 : レーザーインプリント効果の測定

宮永憲明, 計測グループ, レーザーグループ, ターゲットグループ, 畦地宏, 重森啓介, 中井光男, 目黒貴一, 兒玉了祐, 松井伸幸, 西口彰夫, 三間圀興

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 228 - 228 1995年
30p-R-3 レーザープラズマの流体力学的不安定性3 : リップル衝撃波の伝播特性

重森啓介, 石崎龍一, 西原功修, 三間圀興, M T, 畦地宏, 遠藤琢磨, 中井光男, 宮永憲明, 大西芳紀, 西口彰夫, 松井伸幸, 本田満

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 227 - 227 1995年
30p-R-2 レーザープラズマの流体力学的不安定性2 : 非一様衝撃波による接触面の不安定性に関する理論的解析

石崎龍一, 重森啓介, 西原功修, 坂上仁志, 上島豊, 三間圀興, 西口彰夫, 松井伸幸, 本田満, 畦地宏

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 227 - 227 1995年
30p-R-11 二次元Fokker-PlanckシミュレーションによるRayleigh-Taylor不安定性の解析

本田満, 三間圀興, 松井伸幸, 西口彰夫

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 231 - 231 1995年
30p-R-10 不均一衝撃波伝播と爆縮の初期過程の解析

松井伸幸, 三間圀興, 本田満, 西口彰夫, 石崎龍一, 西原功修, 重森啓介, 畦地宏

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 231 - 231 1995年
30p-R-1 レーザープラズマの流体力学的不安定性 1 : オーバービュー

中井光男, 前川修, 西口彰夫, 松井伸幸, 本田満, 石崎龍一, 高部英明, 西原功修, 三間圀興, 計測グループ, レーザーグループ, 畦地宏, ターゲットグループ, 近藤克昭, 重森啓介, 遠藤琢磨, 宮永憲明, 白神宏之, 目黒貴一, 兒玉了祐, 大西芳紀

日本物理学会講演概要集. 秋の分科会 1995 ( 0 ) 226 - 226 1995年
31a-YX-13 高精度激光XII号レーザーによる爆縮実験 : この一連の実験は点火・高利得へ外挿しうるか?

高部英明, 加藤義章, 山中龍彦, 中井貞雄, 畦地宏, 西村博明, 白神宏之, 本田満, 村上匡且, 福田優子, 西原功修, 三間圀興

日本物理学会講演概要集. 年会 50 ( 0 ) 212 - 212 1995年
31p-YX-3 点火・燃焼ターゲット設計へのNonlocal Heat Transportの効果

本田満, 三間圀興, 西口彰夫, 高部英明, 畦地宏, 中井貞雄

日本物理学会講演概要集. 年会 50 ( 0 ) 226 - 226 1995年
2a-W-2 爆縮不均一のスタートアップ問題I : 理論的背景と総括

三間圀興, 遠藤琢磨, 西口彰夫, 畦地宏, 重森啓介, 中井光男, 中路晋一, 田中和夫, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 130 - 130 1994年8月
2a-W-9 X線モノクロ画像計測を用いた電子温度マッピングと爆縮コアプラズマ診断

GODグループ, 中井貞雄, 加藤義章, OTグループ, Mグループ, Uschmann I, 高部英明, 西村博明, 藤田和久, Tグループ

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 133 - 133 1994年8月
2a-W-8 レーザー爆縮コアプラズマにおけるホットスパーク構造 : II.低次モード不均一構造

部屋学, 白神宏之, 宮永憲明, 西原功修, 児玉了祐, 金辺忠, 乗松孝好, 加藤義章, 中井貞雄, T groups, M group, GOD group

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 133 - 133 1994年8月
2a-W-7 レーザー爆縮コアプラズマにおけるホットスパーク構造 : I.ホットスパーク加熱

白神宏之, 部屋学, 宮永憲明, 西原功修, 田中和夫, 兒玉了祐, 金邊忠, 乗松孝好, 加藤義章, 山中龍彦, 中井貞雄, Tグループ, Mグループ, GODグループ

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 132 - 132 1994年8月
2a-W-5 爆縮不均一のスタートアップ問題IV : シミュレーション

西口彰夫, 三間圀興, 遠藤琢磨, 畦地宏, 重森啓介, 中井光男, 中路晋一, 田中和夫, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 131 - 131 1994年8月
2a-W-4 爆縮不均一のスタートアップ問題III : レーザー誘起衝撃波観測

中路晋一, 田中和夫, 重森啓介, 遠藤琢磨, 畦地宏, 三間圀興, 西口彰夫, 中井貞雄, GODグループ, Mtグループ, Tグループ

日本物理学会講演概要集. 秋の分科会 1994 ( 4 ) 131 - 131 1994年8月
28a-YC-10 爆縮核融合のコアダイナミクス研究 II : X線駆動爆縮におけるコアの低次モード不均一性

藤島晃, 白神宏之, 部谷学, 西村博明, 高部英明, 加藤義章, 中井貞雄, GOD T.MT groups

日本物理学会講演概要集. 年会 49 ( 4 ) 152 - 152 1994年3月
28p-YC-8 レーザー加熱シリンドリカルキャビティー中での輻射分布とエンドキャップの効果

砂原淳, 西村博明, 白神宏之, 押鐘寧, 遠藤琢磨, 加藤義章, 中井貞雄, GOD MT.T.OTグループ

日本物理学会講演概要集. 年会 49 ( 4 ) 173 - 173 1994年3月
28p-YC-1 レーザーパルス照射初期における流体力学的不安定性成長の観測

重森啓介, 畦地宏, 遠藤琢磨, 佐藤雅昭, 中路晋一, 田中和夫, 中井光男, 池田直美, 児玉了祐, 西口彰夫, 三間圀興, 中井貞雄, GOD T.Mtグループ

日本物理学会講演概要集. 年会 49 ( 4 ) 169 - 169 1994年3月
28a-YC-9 爆縮核融合のコアダイナミクス研究 : I.超高時間分解2次元X線画像計測法によるコアダイナミクスの研究

白神宏之, 藤島晃, 部谷学, 前川修, 島田京子, 加藤義章, 山中龍彦, 中井貞雄, GOD T.MTグループ

日本物理学会講演概要集. 年会 49 ( 4 ) 151 - 151 1994年3月
28a-YC-6 パワーバランス制御されたレーザー照射によるクライオターゲット爆縮

田中和夫, 山中龍彦, 西原功修, 北川米喜, 宮永憲明, 西村博明, 中井光男, 白神宏之, 児玉了祐, 遠藤琢磨, 井沢靖和, 乗松孝好, 高木勝, 中塚正大, 金辺忠, 漆原新治, 鈴木和浩, 森尾登, 前川修, 斉藤昌樹, 福田優子, 藤田和久, 重森啓介, 塚本雅裕, 那須宏, 広利清, 米田仁紀, M.GOD Tグループ, 中井貞雄

日本物理学会講演概要集. 年会 49 ( 4 ) 150 - 150 1994年3月
28a-YC-11 爆縮核融合のコアダイナミクス研究 III : ガス燃料ターゲットの爆縮コア構造

部谷学, 白神宏之, 藤島晃, 西原功修, 田中和夫, 児玉了祐, 北川米喜, 山中龍彦, 加藤義章, 中井貞雄, GOD T.MT groups

日本物理学会講演概要集. 年会 49 ( 4 ) 152 - 152 1994年3月
28a-YC-2 高速レーザー爆縮におけるアイセントロープコントロール

本田満, 西口彰夫, 三間圀興, 高部英明, 畦地宏, 中井貞雄

日本物理学会講演概要集. 年会 49 ( 0 ) 148 - 148 1994年
28a-YC-8 重水素クライオターゲット爆縮の核反応粒子測定

北川米喜, 斉藤昌樹, 重森啓介, 漆原新治, 金辺忠, 森尾登, 中塚正大, 乗松孝好, 那須弘, 高木勝, 井澤靖和, 田中和夫, 石原昌宏, 三田博昭, 塚本雅裕, 藤田和久, 部谷学, 畦地宏, 佐藤雅昭, 古河裕之, 中井貞雄, 米田仁紀, 中井光男, 西原功修, 山中龍彦, 白神宏之, 児玉了祐, 遠藤琢磨, 前川修

日本物理学会講演概要集. 年会 49 ( 0 ) 151 - 151 1994年
28a-YC-7 パワーバランス向上と圧縮の一様性

西原功修, 西村博明, 山中龍彦, 金辺忠, 漆原新治, 森尾登, 中塚正大, 高木勝, 乗松孝好, 井澤靖和, 部谷学, 村上匡且, 藤田和久, 石原昌宏, 坂上仁志, 白神宏之, 田中和夫, 児玉了祐, 北川米喜, 宮永憲明, 中井光男

日本物理学会講演概要集. 年会 49 ( 0 ) 150 - 150 1994年
2a-W-3 爆縮不均一のスタートアップ問題II : 初期擾乱成長の観測

重森啓介, 三間圀興, 西口彰夫, 本田満, 中井貞雄, GODグループ, Mtグループ, Tグループ, 遠藤琢磨, 畦地宏, 佐藤雅昭, 中井光男, 中路晋一, 宮永憲明, 松岡伸一, 安藤彰修

日本物理学会講演概要集. 秋の分科会 1994 ( 0 ) 130 - 130 1994年
2p-W-7 高速レーザー爆縮におけるアイセントロープコントロールII

本田満, 西口彰夫, 三間圀興, 高部英明, 畦地宏, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1994 ( 0 ) 154 - 154 1994年
2p-W-11 超高強度レーザー照射下のプラズマにおける電子エネルギー分布の解析

宮本斉児, 本田満, 加藤進, 西口彰夫, 三間圀興

日本物理学会講演概要集. 秋の分科会 1994 ( 0 ) 156 - 156 1994年
2a-W-6 爆縮不均一のスタートアップ問題V : まとめ

遠藤琢磨, 三間圀興, 西口彰夫, 本田満, 中井貞雄, GODグループ, MTグループ, Tグループ, 重森啓介, 畦地宏, 佐藤雅昭, 中井光男, 中路晋一, 宮永憲明, 松岡伸一, 安藤彰修

日本物理学会講演概要集. 秋の分科会 1994 ( 0 ) 132 - 132 1994年
13a-N-1 X線駆動爆縮における基礎過程I : キャビティー輻射生成に対するエンドキャップの効果

砂原淳, 西村博明, 藤田和久, 藤島晃, 白神宏之, 遠藤琢磨, 加藤義章, 中井貞雄, OT GOD OT T MTグループ

日本物理学会講演概要集. 秋の分科会 1993 ( 4 ) 226 - 226 1993年9月
13a-N-2 X線駆動爆縮における基礎過程II : CHコートAuターゲットによる低次モード爆縮不均一性の改善

藤島晃, 遠藤琢磨, 白神宏之, 砂原淳, 藤田和久, 西村博明, 加藤義章, 中井貞雄, GOD OT T MTグループ

日本物理学会講演概要集. 秋の分科会 1993 ( 4 ) 227 - 227 1993年9月
29p-ZD-11 レーザーと低Z二層構造ターゲットとの相互作用(プラズマ物理・核融合)

塚本雅裕, 加道雅孝, 押鐘寧, 池田直美, 有田俊介, 片山誠, 中井光男, 乗松孝好, 田中和夫, 西口彰夫, 山中龍彦, 西原功修, 三間圀興, 中井貞雄, T M GODグループ

日本物理学会講演概要集. 年会 48 ( 4 ) 143 - 143 1993年3月
30a-ZD-2 X線爆縮核融合II : ガス燃料ペレットの爆縮コア形成(プラズマ物理・核融合<慣性(レーザー)>)

白神宏之, 遠藤琢磨, 大場伸和, 押鐘寧, 藤島晃, 重森啓介, 西村博明, 木曽達夫, 砂原淳, 高部英明, 加藤義章, 中井貞雄, GOD OT

日本物理学会講演概要集. 年会 48 ( 4 ) 164 - 164 1993年3月
30a-ZD-8 D_2クライオターゲット爆縮の特性(プラズマ物理・核融合<慣性(レーザー)>)

Richard A., 川島輝之, 田中和夫, 西原功修, 山中龍彦, 北川米喜, 乗松孝好, 中井光男, 片山誠, 加道雅孝, 塚本雅裕, 陳卓明, 宮永憲明, 畦地宏, 金辺忠, 森尾登, 前川修, 斎藤昌樹, 高木勝, 中井貞雄, M.GOD.OT.Tグループ

日本物理学会講演概要集. 年会 48 ( 4 ) 167 - 167 1993年3月
30a-ZD-3 X線爆縮核融合III : X線分光によるコアプラズマ診断(プラズマ物理・核融合<慣性(レーザー)>)

藤田和久, 木曽達夫, 西村博明, 白神宏之, 遠藤琢磨, 押鐘寧, 藤島晃, 加藤義章, 中井貞雄, GOD. OT. T. Mグループ

日本物理学会講演概要集. 年会 48 ( 4 ) 164 - 164 1993年3月
13a-N-9 高アブレーション圧力発生のためのスケーリング : Kinetic Effectsについて

本田満, 三間圀興, 西口彰夫, 畦地宏, 中井貞雄

日本物理学会講演概要集. 秋の分科会 1993 ( 0 ) 230 - 230 1993年
1a-L-5 ゲルマニウム軟X線レーザーにおける高分解スペクトルの測定(原子・分子)

袁鋼, MacFee Andrew, 村井健介, 児玉了祐, Shultz Michael, 大道博行, 山中正宣, 加藤義章, 中井貞雄, Neely David

日本物理学会講演概要集. 年会 48 ( 0 ) 61 - 61 1993年
Temporally resolved pictures of imploding laser fusion targets'

127 1993年
レーザー核融合における爆縮過程の撮影

中井光男

オプトロニクス社「先端画像テクノロジー」 127 1993年
レーザーエネルギー応用

本木裕, 原村和人, 西原功修, 中野人志, 椿本孝治, 高橋健一, 松岡伸一, 宮永憲明, 関口宏, 原秀雄, 望月孝晏, 東博純, 武市晃洋, 許斐一郎, 野田正治, 日高由美子, 中野睦子, 矢原出, 原民夫, 小舘香椎子, 岩井荘八, 安藤剛三, 根岸文子, 三原勝, 青柳克信, 村井健介, 袁鋼, 児玉了祐, 下村肇, Shultz Michael, 大道博行, 加藤義章, Neely David, MacFee Andrew, 中井貞雄, 篠原邦夫, 児玉巌, 本田捷夫, 能丸圭司, 米田仁紀, 陳延偉, 井澤靖和, 山中千代衛, 仁木秀明, 北嶋厳, 柏田順治, 鈴木大介, 西岡一, 武田庄司, 奥田功, 植田憲一, 大和田野芳郎, 屋代英彦, 松本裕治, 重森啓介, 遠藤琢磨, 押鐘寧, 白神宏之, 藤島晃, 木曽達也, 砂原淳, 宅間宏, 西村博明, Sigel R., Eidmann K., Löwer T., Massen J., Meyer-ter-vehn J., Tsakiris G. D., Witkowski S., 片山誠, 西口彰夫, 佐々木明, 中井光男, Richard Andre, 畦地宏, 川島輝之, 三間国興, 高山定次, 吉田弘樹, 岩橋正樹, 阪上幸男, 近藤司, 鈴木健也, 椿原啓, 久保宇市, 藤原閲夫, 内田成明, 島田義則, 河崎善一郎, 松浦虔士, 王道洪, 松嶋功, 小山和義, 有留宏明, 富江敏尚, 三浦永祐, 根本孝七, 藤井隆, 後藤直彦, 西紀昭, 實野孝久, 橋本孝治, 村上匡且, 中塚正大

レーザー研究 21 ( 0 ) 95 - 108,113 1993年
26a-A-10 レーザーと低Zプラズマとの相互作用 I : 誘導ラマン散乱

塚本雅裕, 加道雅孝, 押鐘檸, 池田直美, 片山誠, 中井光男, 乗松孝好, 田中和夫, 西口彰夫, 山中龍彦, 西原功修, 三間国興, 中井貞雄, GOD.T.Mグループ

秋の分科会講演予稿集 1992 ( 4 ) 146 - 146 1992年9月
26a-A-9 アブレータ付き低温重水素ターゲット爆縮 III : 爆縮ダナミクス

Richard A, 山中龍彦, 西原功修, 田中和夫, 乗松孝好, 北川米喜, 中井光男, 陳卓明, 川島輝之, 大場伸和, 宮永憲明, 森尾登, 金辺忠, 前川修, 斉藤昌樹, 高木勝, 中井貞雄, M GOD O OTグループ

秋の分科会講演予稿集 1992 ( 4 ) 145 - 145 1992年9月
26a-A-8 アプレーター付低温重水素ターゲット爆縮 II : コアパメーター

北川米喜, 山中龍彦, 西原功修, 田中和夫, 乗松孝好, 中井光男, 陳卓明, Richard A, 川島輝之, 大場伸和, 佐藤雅昭, 宮永憲明, 畦地宏, 森尾登, 金辺忠, 前川修, 斉藤昌樹, 高木勝, 中井貞雄, M GOD O OTグループ

秋の分科会講演予稿集 1992 ( 4 ) 145 - 145 1992年9月
26a-A-7 アプレーター付低温重水素ターゲット爆縮 I : Key Issues

田中和夫, 北川米喜, 山中龍彦, 西原功修, 乗松孝好, 中井光男, 陳卓明, Richard A, 川島輝之, 大場伸和, 佐藤雅昭, 宮永憲明, 畦地宏, 森尾登, 金辺忠, 前川修, 斉藤昌樹, 高木勝, 中井貞雄, GoD M T OTグループ

秋の分科会講演予稿集 1992 ( 4 ) 144 - 144 1992年9月
26p-A-6 ターゲット加速の一様性のシミュレーションによる解析

西口彰夫, 三間国興, 片山誠, 畦地宏, 宮永憲明, 中井光男, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1992 ( 4 ) 151 - 151 1992年9月
29p-S-8 高密度爆縮プラズマのX線分光診断(爆縮コアからのAr線スペクトル)

木曽達夫, 西村博明, 遠藤琢磨, 白神宏之, 高部英明, 加藤義章, 中井貞雄, Mt GOD T OTグループ

年会講演予稿集 47 ( 4 ) 53 - 53 1992年3月
30a-ZA-10 X線爆縮核融合 : IV 混合物質からのX線放射特性

西村博明, 高部英明, 遠藤琢磨, 白神宏之, 押鐘寧, 中村学, 木曽達夫, 加藤義章, 中井貞雄, Mtグループ, GODグループ, Tグループ, OTグループ

年会講演予稿集 47 ( 4 ) 243 - 243 1992年3月
30a-ZA-9 X線爆縮核融合 : III 再放射X線の特性

遠藤琢磨, 高部英明, 白神宏之, 西村博明, 押鐘寧, 中村学, 木曽達夫, 加藤義章, 中井貞雄, 山中千代衛, MTグループ, GODグループ, Tグループ, OTグループ

年会講演予稿集 47 ( 4 ) 243 - 243 1992年3月
30a-ZA-7 X線爆縮核融合 : I 球対称高密度圧縮

白神宏之, 遠藤琢磨, 押鐘寧, 西村博明, 高部英明, 村上匡旦, 中村学, 木曽達夫, 加藤義章, 中井貞雄, Mtグループ, GODグループ, Tグループ, OTグループ

年会講演予稿集 47 ( 4 ) 242 - 242 1992年3月
30a-ZA-6 アブレータ付フォームクライオターゲット爆縮実験 : IV 爆縮コアパラメータ

川島輝之, 片山誠, 中井光男, 田中和夫, 塚本雅裕, 乗松孝好, 高木勝, 西原功修, 金辺忠, 山中龍彦, 中井貞男, 山中千代衛, Mグループ, Tグループ, GODグループ

年会講演予稿集 47 ( 4 ) 241 - 241 1992年3月
30a-ZA-5 アブレータ付フォームクライオターゲット爆縮実験 : III ダイナミクス

田中和夫, 山中龍彦, 西原功修, 乗松孝好, 中井光男, 片山誠, 塚本雅裕, 陳卓明, 川島輝之, 三田博昭, 大淵修三, 森尾登, 金辺忠, 高木勝, Richardson M.C., 中井貞雄, M GOD Tグループ

年会講演予稿集 47 ( 4 ) 241 - 241 1992年3月
30a-ZA-3 アブレータ付フォームクライオターゲット爆縮実験 : I アブレーション

西原功修, 田中和夫, 中井光男, 乗松孝好, 高木勝, 片山誠, 山中龍彦, 中井貞雄

年会講演予稿集 47 ( 4 ) 240 - 240 1992年3月
27p-T-6 電子衝突励起型Ge軟X線レーザー用薄膜ターゲットの最適設計

大道博行, 中井貞雄, Djaui A, Lewis C.L.S, Neely D, O'Neill D.M, 村井健介, 袁鋼, 東博純, 白神宏之, 山中正宣, 加藤義章, 高木勝, 金辺忠

年会講演予稿集 47 ( 0 ) 372 - 372 1992年
Implosion Experiments of Plastic Shell Targets with Cryogenically Cooled Deuterium Fuel Gekko XII

68,79 1992年
30a-ZA-2 2層構造ターゲットにおける誘導ラマン散乱の発生

塚本雅裕, 西原功修, 山中龍彦, 西口彰夫, 三間圀興, 中井貞雄, T.M.GODグループ, 加道雅孝, 富樫大, 山本英俊, Vick D, 片山誠, 中井光男, 乗松孝好, 田中和夫

年会講演予稿集 47 ( 0 ) 239 - 239 1992年
30a-ZA-4 アブレータ付フォームクライオターゲット爆縮実験 : II ターゲットの製作

高木勝, 石原昌弘, 乗松孝好, 山中龍彦, 中井貞雄

年会講演予稿集 47 ( 0 ) 1992年
クライオターゲット爆縮実験の現状

核融合研究 68,79 1992年
29p-G-9 X線爆縮核融合I : 研究計画と球対称爆縮の成果

白神宏之, 遠藤琢磨, 押鐘寧, 西村博明, 高部英明, 村上匡旦, 宮本修治, 中村学, 木曽達夫, 加藤義章, 中井貞雄, Mt GOD T OTグループ

年会講演予稿集 46 ( 4 ) 222 - 222 1991年9月
26a-D-10 クライオジェニック重水素ターゲットの爆縮III : Dynamics

片山誠, 中井光男, 小林伸次, 塚本雅裕, 乗松好孝, 高木勝, 田中和夫, 金辺忠, 西原功修, 山中龍彦, 中井貞雄, M T GOD グループ

春の分科会講演予稿集 1991 ( 4 ) 160 - 160 1991年3月
26a-D-11 クライオジェニック重水素ターゲットの爆縮 IV : 爆縮コアパラメータ

中井光男, 小林尚志, 大脇成晴, 小林伸次, 片山誠, 田中和夫, 畦地宏, 乗松孝好, 高木勝, 伊東元, ハイムリッヒベルント, 西原功修, 山中龍彦, 中井貞雄, 金辺忠, 山中千代衛

春の分科会講演予稿集 1991 ( 4 ) 161 - 161 1991年3月
26a-D-8 クライオジェニック重水素ターゲットの爆縮 I. : シミュレーション

西原功修, 山内豊, 山中龍彦, 田中和夫, 中井光男, 畦地宏, 乗松孝好, 片山誠, 小林伸次, 小林尚志, 大脇成晴, 中井貞雄

春の分科会講演予稿集 1991 ( 4 ) 159 - 159 1991年3月
27a-N-12 ガラスレーザー激光XII号を用いた軟X線レーザー実験II : 高利得長積軟X線レーザー

大道博行, 東博純, 村井健介, 白神宏之, 三浦永祐, 山川孝一, 戸川拓哉, 高部英明, 高木勝, 金辺忠, 田中和夫, 山中正宣, 加藤義章, 中井貞雄, GODグループ, Tグループ, MTグループ, Lewis C., Neill D.O', Neely D., Pert G., Ramsden S., Key M.

春の分科会講演予稿集 1991 ( 2 ) 436 - 436 1991年3月
27a-N-11 ガラスレーザー激光XII号を用いた軟X線レーザー実験I : 利得測定

東博純, 大道博行, 村井健介, 山川孝一, 白神宏之, 三浦永祐, 高木勝, 金辺忠, 田中和夫, 高部英明, 戸川拓哉, 山中正宣, 加藤義章, 中井貞雄, GODグループ, Tグループ, MTグループ, Lewis C., Neill D.O', Neely D., Ramsden S., Pert G.J., Key M.

春の分科会講演予稿集 1991 ( 2 ) 436 - 436 1991年3月
26p-D-6 X線駆動爆縮核融合 II : X線強度分布と閉じ込め効果

中村学, 遠藤琢磨, 宮本修治, 白神宏之, 加藤義章, 中井貞雄, GOD, OT, M, Tグループ

春の分科会講演予稿集 1991 ( 4 ) 164 - 164 1991年3月
26a-D-6 衝撃波観測によるレーザー照射不均一の熱緩和の計測

加道雅孝, 節原裕一, 中井光男, 片山誠, 西口彰夫, 三間国興, 中井貞雄, T M, 山本英俊, Vick D, 児玉了祐, 塚本雅裕, 田中和夫, 宮永憲明, 望月康史, 畦地宏

春の分科会講演予稿集 1991 ( 0 ) 158 - 158 1991年
26a-D-7 SiドープターゲトによるX線先行加熱の計測

山本英俊, 片山誠, 中井光男, 西口彰夫, 三間国興, 中井貞雄, T M, 加道雅孝, Vick D, 児玉了祐, 塚本雅裕, 田中和夫, 宮永憲明, 畦地宏, 節原裕一

春の分科会講演予稿集 1991 ( 0 ) 159 - 159 1991年
26a-D-9 クライオジェニック重水素ターゲットの爆縮II : 全体像

田中和夫, 安本真樹, 小林信次, 陳卓明, 大脇成晴, MT GOD, 中井貞雄, 山中龍彦, 西原功修, 中井光男, 乗松孝好, 片山誠, 伊東元, 加道雅孝, 塚本雅裕

春の分科会講演予稿集 1991 ( 0 ) 1991年
26p-D-4 レーザー照射不均一によるSRS、TPD成長の計測

塚本雅裕, 乗松孝好, 田中和夫, 山中龍彦, 西原功修, 三間圀興, 中井貞雄, T M, 児玉了祐, 加道雅孝, Vick D, 山本英俊, 安本真樹, 伊東元, 片山誠, 中井光男

春の分科会講演予稿集 1991 ( 0 ) 163 - 163 1991年
High density compression of hollow pellet by Gekko XII at Osaka

Laser and Particle Beams 9 193 1991年
29p-G-4 重水素プラズマ中におけるグリーン光レーザーによる誘導ラマン散乱の発生機構

塚本雅裕, 山中龍彦, 西原功修, 三間圀興, 中井貞雄, T M GODグループ, 児玉了祐, 加道雅孝, D Vick, 山本英俊, 片山誠, 中井光男, 乗松孝好, 田中和夫

年会講演予稿集 46 ( 0 ) 220 - 220 1991年
30p-R-1 ネオン様ゲルマニウムにおける軟X線の増幅

大道博行, 高木勝, 中井貞雄, GOD T, C.L Lewis, D Neely, D.O Neill, 村井健介, 東博純, 白神宏之, 三浦永祐, 袁鋼, 山中正宣, 加藤義章, 金辺忠

年会講演予稿集 46 ( 0 ) 380 - 380 1991年
Temporally resolved pictures of imploding laser fusion targets.

10 ( 12 ) 1991年
3a-T-4 直接照射爆縮における流体力学的不安定性の観測(1) : アブレーティブスタビライゼーション1

片山誠, 畦地宏, 宮永憲明, 中井光男, 西口彰夫, 高木勝, 実野孝久, 中塚正大, 三間圀興, 中井貞雄

秋の分科会講演予稿集 1990 ( 4 ) 188 - 188 1990年9月
3a-T-6 X線輻射駆動爆縮核融合II : 爆縮ダイナミクス

白神宏之, 中村学, 押鐘寧, 片山誠, 遠藤琢磨, 田中和夫, 野田隆之, 西村博明, 高部英明, 加藤義章, 中井貞雄, GODグループ, Mグループ, Tグループ, OTグループ

秋の分科会講演予稿集 1990 ( 4 ) 189 - 189 1990年9月
3a-T-5 X線駆動爆縮核融合I : X線強度分布

中村学, 遠藤琢磨, 白神宏之, 宮本修治, 高部英明, 西村博明, 加藤義章, 中井貞雄, GODグループ, Mグループ, Tグループ, OTグループ

秋の分科会講演予稿集 1990 ( 4 ) 189 - 189 1990年9月
2a-TG-10 X線核融合IV圧縮の球対称性と到達コアパラメータ

白神宏之, 西村博明, 近藤公伯, 遠藤琢磨, 片山誠, 小林尚志, 中村学, 高部英明, 加藤義章, 中井貞雄, GOD OT M Tグループ

年会講演予稿集 45 ( 4 ) 233 - 233 1990年3月
2a-TG-9 X線核融合 III : 圧縮一様性の評価

片山誠, 白神宏之, 西村博明, 中井光男, 遠藤琢磨, 近藤公伯, 中村学, 高部英明, 加藤義章, 中井貞雄

年会講演予稿集 45 ( 4 ) 232 - 232 1990年3月
2a-TG-8 X線核融合II : シリンダー型エミッターの最適化

中村学, 西村博明, 近藤公伯, 片山誠, 白神宏之, 遠藤琢麿, 高部英明, 加藤義章, 中井貞雄, GOD OT M Tグループ

年会講演予稿集 45 ( 4 ) 232 - 232 1990年3月
2a-TG-12 X線核融合VI : 高Z物質中の輻射輸送

近藤公伯, 杉本耕一, 西村博明, Shiraga H., 遠藤琢磨, 高部英明, 加藤義章, 中井貞雄, GOD OT M Tグループ

年会講演予稿集 45 ( 4 ) 234 - 234 1990年3月
1p-TF-1 タライオジェニックターゲット実験I : 爆縮特性

田中和夫, 篠原誠一, 中井光男, 乗松孝好, 山中龍彦, 西原功修, 中井貞雄, GOD Mt.T, 児玉了祐, Zeller P, 加道雅孝, Vick D, 塚本雅裕, 樹山英則, 片山誠, 小林伸次

年会講演予稿集 45 ( 0 ) 205 - 205 1990年
1p-TF-5 クライオジェニックターゲット実験 V : 誘導ラマン散乱計測

塚本雅裕, 安本真樹, 伊東元, 片山誠, 篠原誠一, 小林伸次, 中井光男, 田中和夫, 乗松孝好, 山中龍彦, 西原功修, 児玉了祐, 中井貞雄, T M, 加道雅孝, Zeller P, Vick D, 樹山英則, 片山英史, 陳卓明, 開発隆弘

年会講演予稿集 45 ( 0 ) 207 - 207 1990年
1p-TF-4 クライオジェニックターゲット実験IV : 散乱光計測

加道雅孝, 山中龍彦, 西原功修, 中井貞雄, 樹山英則, 田中和夫, 児玉了祐, 塚本雅裕, Zeller P, Vick D, 中井光男, 乗松孝好

年会講演予稿集 45 ( 0 ) 206 - 206 1990年
1p-TF-3 クライオジェニックターゲット実験III : X線スペクトロスコピー

Zeller P, 加道雅孝, 塚本雅裕, 樹山英則, 西原功修, 山中龍彦, Yamanaka C, 中井貞雄, 小林尚志, T M, 中井光男, 田中和夫, 乗松孝好, Kanabe T, Katayama H, 児玉了祐, Vick D, Katayama M

年会講演予稿集 45 ( 0 ) 206 - 206 1990年
1p-TF-2 クライオジェニックターゲット実験II : エネルギー輸送

児玉了祐, Vick D, 金辺忠, 片山秀史, 片山誠, 三間圀興, 西原功修, 山中龍彦, 中井貞雄, T M, 田中和夫, 乗松孝好, 中井光男, 西口彰夫, 加道雅孝, 塚本雅裕, 樹山英則, Zeller P

年会講演予稿集 45 ( 0 ) 205 - 205 1990年
3p-T-1 Study of energy transport in low Z plasmas with cryogenic Targets

田中和夫, 乗松孝好, 伊東元, 陳卓明, 片山秀史, 開発隆広, 安本真樹, 西口彰夫, 三間圀興, 実野孝久, 西原功修, 児玉了祐, 山中龍彦, 中井貞雄, Vick Dong, 加道雅孝, 塚本雅裕, 山本英俊, 片山誠, 中井光男, 高木勝

秋の分科会予稿集 1990 ( 0 ) 193 - 193 1990年
3p-T-3 レーザープラズマ中でのSRS : しきい値付近での成長過程

塚本雅裕, 伊東元, 陳卓明, 片山秀史, 開発隆広, 安本真樹, 三間圀興, 西原功修, 山中龍彦, 中井貞雄, Tグループ, 田中和夫, Mグループ, GODグループ, 児玉了祐, Vick Dong, 加道雅孝, 山本英俊, 片山誠, 中井光男, 乗松孝好

秋の分科会予稿集 1990 ( 0 ) 194 - 194 1990年
3p-T-2 Measurement of Three Halves Harmonic Emission and Suprathermal Electron from Laser-Produced Low-z Plasmas

加道雅孝, 陳卓明, 乗松孝好, 山中龍彦, 西原功修, 三間圀興, 中井貞雄, Tグループ, Mグループ, GODグループ, 児玉子祐, 塚本雅裕, Vick D, 山本英俊, 田中和夫, 片山誠, 中井光男, 片山秀史

秋の分科会予稿集 1990 ( 0 ) 194 - 194 1990年
1)CCDを用いたX線蛍光ピンホールカメラ(〔テレビジョン電子装置研究会画像表示研究会〕合同)

田中和夫, 篠原誠一, 中井光男, 山中龍彦, 中井貞雄

テレビジョン学会誌 43 ( 10 ) 1167 - 1168 1989年10月
4p-K-12 輻射駆動爆縮 V. : 燃料ペレット爆縮

白神宏之, 西村博明, 高部英明, 小林尚志, 遠藤琢磨, 近藤公伯, 杉本耕一, 片山誠, 中井光男, 加藤義章, 中井貞雄, M T GOD OTグループ

秋の分科会講演予稿集 1989 ( 4 ) 205 - 205 1989年9月
4p-K-7 フォームクライオターゲットのテーラードパルス圧縮のシミュレーション

荒木美次, 西原功修, 村上〓旦, 中井光男, 田中和男, 乗松孝好, 山中龍彦

秋の分科会講演予稿集 1989 ( 4 ) 202 - 202 1989年9月
4p-K-6 フォーム・クライオターゲット爆縮実験

中井光男, 片山誠, 児玉了祐, 篠原誠一, 加道雅孝, 田中和夫, 西原功修, 金辺忠, 片山秀史, 乗松孝好, 山中龍彦, 山中千代衛, 中井貞雄, T M GODグループ

秋の分科会講演予稿集 1989 ( 4 ) 202 - 202 1989年9月
4p-K-5 フォームクライオターゲット中でのエネルギー輸送

児玉了祐, 田中和夫, 乗松好孝, 中井光男, 片山秀史, 片山誠, 加道雅孝, 塚本雅裕, 金辺忠, 西原功修, 山中龍彦, 山中千代衛, 中井貞雄, M T.GODグループ

秋の分科会講演予稿集 1989 ( 4 ) 201 - 201 1989年9月
31p-TF-10 フォームクライオターゲット爆縮VI : 爆縮の対称性(プラズマ物理・核融合(レーザー核融合))

片山誠, 篠原誠一, 渡部孝, 中井光男, 児玉了祐, 田中和夫, 片山秀史, 乗松孝好, 金辺忠, 実野孝久, 中塚正大, 西原功修, 加藤義章, 山中龍彦, 山中千代衛, 中井貞雄

年会講演予稿集 44 ( 4 ) 232 - 232 1989年3月
31p-TF-9 フォーム・クライオターゲット爆縮V : 爆縮ダイナミックスとコアパラメーター(プラズマ物理・核融合(レーザー核融合))

中井光男, 児玉了祐, 片山誠, 渡部孝, 篠原誠一, 富田律也, 加道雅孝, 田中和夫, 西原功修, 金辺忠, 乗松孝好, 山中龍彦, 山中千代衛, 中井貞雄

年会講演予稿集 44 ( 4 ) 232 - 232 1989年3月
31p-TF-8 フォームクライオターゲット爆縮実験IV : エネルギー輸送(プラズマ物理・核融合(レーザー核融合))

児玉了祐, 田中和夫, 中井光男, 加道雅孝, 冨田律也, 乗松好孝, 片山秀史, 金辺忠, 実野孝久, 中塚正大, 西原功修, 山中龍彦, 山中千代衛, 中井貞雄

年会講演予稿集 44 ( 4 ) 231 - 231 1989年3月
31p-TF-7 フォームクライオターゲット爆縮III(プラズマ物理・核融合(レーザー核融合))

田中和夫, 児玉了祐, 加道雅孝, 冨田律也, 中井光男, 乗松孝好, 金辺忠, 西原功修, 山中龍彦, 山中千代衛, 中井貞雄

年会講演予稿集 44 ( 4 ) 231 - 231 1989年3月
31p-TF-5 フォームクライオターゲット爆縮(プラズマ物理・核融合(レーザー核融合))

山中龍彦, 西原功修, 田中和夫, 乗松孝好, 実野孝久, 中塚正大, 加藤義章, 中井貞雄, Tグループ, GODグループ, Mグループ, 中井光男, 金辺忠, 山中千代衛

年会講演予稿集 44 ( 4 ) 230 - 230 1989年3月
慣性核融合用極低温フォームターゲットの燃料充填量の制御

西野嘉也, 山中千代衛, 乗松孝好, 片山秀史, 高木勝, 田中和夫, 中井光男, 加藤義章, 山中龍彦, 中井貞雄

低温工学 24 ( 6 ) 351 - 356 1989年
4p-D6-6 フォームクライオ実験I -爆縮実験-

田中和夫, 山中龍彦, 西原功修, 中井光男, 児玉了祐, 乗松孝好, 片山秀史, 村上匡旦, 金辺忠, 実野孝久, 中塚正大, 加藤義章, 山中千代衛, 中井貞雄, M2 M6 T GODグループ

秋の分科会講演予稿集 1988 ( 4 ) 178 - 178 1988年9月
4p-D6-8 フォームクライオ実験III -低密度ターゲット中でのエネルギー輸送-

児玉了祐, 田中和夫, 中井光男, 加道雅孝, 冨田律也, 乗松孝好, 片山秀史, 村上匡旦, 金辺忠, 実野孝久, 中塚正大, 西原功修, 加藤義章, 山中龍彦, 山中千代衛, 中井貞雄

秋の分科会講演予稿集 1988 ( 4 ) 179 - 179 1988年9月
4p-D6-7 フォームクライオ実験II -時間分解画像計測-

片山誠, 篠原誠一, 中井光男, 児玉了祐, 田中和夫, 片山秀史, 乗松孝好, 村上匡旦, 金辺忠, 実野孝久, 中塚正大, 西原功修, 加藤義章, 山中龍彦, 山中千代衛, 中井貞雄

秋の分科会講演予稿集 1988 ( 4 ) 179 - 179 1988年9月
1a-H2-1 激光XII号による中空シェルペレットの爆縮(プラズマ物理・核融合(レーザー))

中井貞雄, 三間圀興, 畦地宏, 高部英明, 宮永憲明, 山中龍彦, 山中正宣, 西原功修, 田中和夫, 中井光男, 乗松孝好, 村上匡旦, 加藤義章, 実野孝久, 金辺忠, 中塚正大, 山中千代衛

年会講演予稿集 43 ( 4 ) 160 - 160 1988年3月
1a-H3-3 半影カメラのプロトンイメーシングへの応用(プラズマ物理・核融合(A:中性スペクトル,磁場・乱流))

陳延偉, 宮永憲明, 畦地宏, 中井光男, 田中和夫, 山中正宣, 山中龍彦, 中井貞雄, 山中千代衛, 田村進一

年会講演予稿集 43 ( 4 ) 172 - 172 1988年3月
1a-H3-2 X線フレーミングカメラを用いたプラズマ輻射X線の診断(プラズマ物理・核融合(A:中性スペクトル,磁場・乱流))

片山誠, 中井光男, 曽観明, 西村博明, 田中和夫, 井沢靖和, 山中龍彦, 中井貞雄

年会講演予稿集 43 ( 4 ) 172 - 172 1988年3月
1a-H2-9 フォームクライオターゲット爆縮III シミュレーション(プラズマ物理・核融合(レーザー))

西原功修, 村上匡旦, 山中龍彦, 乗松孝好, 田中和夫, 中井光男, 中井貞雄

年会講演予稿集 43 ( 4 ) 164 - 164 1988年3月
1a-H2-8 フォームクライオターゲット爆縮II《ターゲット》(プラズマ物理・核融合(レーザー))

片山秀史, 乗松孝好, 西野嘉也, 真野豊司, 中井光男, 田中和夫, 山中龍彦, 加藤義章, 中井貞雄, 山中千代衛

年会講演予稿集 43 ( 4 ) 163 - 163 1988年3月
1a-H2-7 フォームクライオターゲット爆縮I(プラズマ物理・核融合(レーザー))

山中龍彦, 西原功修, 田中和夫, 中井光男, 児玉了祐, 乗松孝好, 片山秀史, 加藤義章, 実野孝久, 金辺忠, 山中千代衛, 中井貞雄, M2 M6 T GODグループ

年会講演予稿集 43 ( 4 ) 163 - 163 1988年3月
1a-H2-11 フォームクライオターゲット爆縮V : ユニフォミティ(プラズマ物理・核融合(レーザー))

中井光男, 陳延偉, 島田耕治, 加道雅孝, 片山誠, 田中和夫, 乗松孝好, 高部英明, 実野孝久, 西原功修, 加藤義章, 山中龍彦, 山中千代衛, 中井貞雄

年会講演予稿集 43 ( 4 ) 165 - 165 1988年3月
27a-Y3-2 劇光XII号ランダムフェーズ光による球形ターゲットの一様爆縮

中井光男, 島田耕治, 前川修, 西村博明, 近藤公伯, 高部英明, 白神宏之, 加藤義明, 井澤靖和, 中井貞雄, 山中千代衛, GOD・OT・T・Mグループ

秋の分科会講演予稿集 1987 ( 4 ) 153 - 153 1987年9月
27a-Y3-4 劇光XII号ランダムフェーズ光照射ターゲットの質量噴出速度計測

西村博明, 桜井浩司, 近藤公伯, 中井光男, 高部英明, 白神宏之, 島田耕治, 加藤義明, 中井貞雄, 山中千代衛, GOD OT T Mグループ

秋の分科会講演予稿集 1987 ( 4 ) 154 - 154 1987年9月
27a-Y3-3 劇光II号ランダムフェーズ光によるターゲットの一様照射

加藤義章, 西村博明, 高部英明, 白神宏之, 中井光男, 近藤公伯, 島田耕治, 実野孝久, 広瀬佳生, 添原新治, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1987 ( 4 ) 153 - 153 1987年9月
27p-LK-5 ダブルシェルターゲットによる高密度圧縮(プラズマ物理・核融合(レーザー))

村上匡旦, 西原功修, 望月孝晏, 中井貞雄, 近藤公伯, 高木勝, 中塚正大, 実野孝久, 井澤靖和, 西村博明, 中井光男, 浦崎智文, 畦地宏, 山中千代衛

年会講演予稿集 42 ( 4 ) 138 - 138 1987年3月
27p-LK-9 激光XII号によるX線輻射キャノンボール実験III : 内球のダイナミックス(プラズマ物理・核融合(レーザー))

中井光男, 島田耕治, 近藤公伯, 浦崎智文, 伊藤嘉明, 桜井浩司, 片山誠, 西村博明, 田中和夫, 村上匡旦, 望月孝晏, 西原功修, 井澤靖和, 山中千代衛, GODグループ, Tグループ, OTグループ, Mグループ

年会講演予稿集 42 ( 4 ) 140 - 140 1987年3月
27p-LK-8 激光XII号によるX線輻射キャノンボール実験II : キャビティ輻射特性(プラズマ物理・核融合(レーザー))

西村博明, 近藤公伯, 桜井浩司, 片山誠, 島田耕治, 浦崎智文, 村上匡旦, 中井光男, 伊藤嘉昭, 田中和夫, 望月孝曼, 西原功修, 井沢靖和, 山中千代衛, GOD OT T Mグループ

年会講演予稿集 42 ( 4 ) 139 - 139 1987年3月
27p-LK-7 激光XII号によるX線輻射キャノンボール実験(1)(プラズマ物理・核融合(レーザー))

西原功修, 井澤靖和, 伊藤嘉昭, 近藤公伯, 桜井浩司, 実野孝久, 島田耕治, 高木勝, 田中和夫, 中井貞雄, 中井光男, 中塚正大, 西村博明, 乗松孝好, 村上匡旦, 望月孝晏, 山中千代衛

年会講演予稿集 42 ( 4 ) 139 - 139 1987年3月
レーザーエネルギー応用

関明宣, 実野考久, 中塚正大, 加巌義章, 佐々木孝友, 吉田国雄, 吉田英次, 横谷篤至, 西田裕紀, 川崎鉄次, 坂本高保, 乗松孝好, 鈴木和浩, 白神宏之, 山中龍彦, 石垣光明, 鍵谷芳樹, 村田実, 服部誠, 岡林誠, 戸塚裕治, 松田操, 高木勝中, 阪上幸男, 有馬泉, 西原功修, 井沢靖和, 近藤公伯, 伊藤嘉昭, 桜井浩司, 島田耕治, 田中和夫, 中井光男, 井貞雄山, 西村博明, 村上匡旦, 望月孝晏, 片山誠, 浦崎智文, 高部英明, 山中正宣, 三間圀興, 畦地宏, 宮永憲明, 山中千代衛, 遠藤琢磨, 四方山和彦, 亀井克哉, 舘剛司, 大谷俊哉, 山川考一, 山内明, 児玉了祐, 加道雅孝, 塩田徳昭, 田島英男, 長谷川正樹, 西口彰夫, 矢部孝, 大道博行, 三浦永祐, 北川米喜, 長谷川晃, 中嶋博樹, 藤田尚徳, 沢井清信, 久保宇市, 中山師生, 大東延久, 和田政良, 沢野祐之, 堂園康治, 久保山正文, 藤本孝, 金辺忠, 中石博之, 斉藤昌樹, 椿原啓, Stspf R. O, 足立智, 高村顕, 仁木秀明, 和田一洋, 竹内敬治, 小澤典明, 片山秀史

レーザー研究 15 ( 0 ) 97 - 121 1987年
29a-N-2 輻射駆動キャノンボールターゲットの設計

三間圀興, 中塚正大, 加藤義章, 井澤靖和, 中井光男, 西村博明, 藤田雅之, 矢部孝, 西原功修, 村上匡旦, 白神宏之, 実野孝久, 山中千代衛

秋の分科会講演予稿集 1986 ( 4 ) 256 - 256 1986年9月
29a-N-9 キャノンボールターゲットにおける燃料コア特性

中井光男, 白神宏之, 加藤義章, 大谷俊哉, 西村博明, 実野孝久, 中塚正大, 三間圀興, 高木勝, 中井貞雄, 井沢靖和, 山中千代衛, GOT・T・Mグループ

秋の分科会講演予稿集 1986 ( 4 ) 259 - 259 1986年9月
29a-N-8 キャノンボールターゲットにおける内球のダイナミックス

西村博明, 島田耕治, 浦崎智文, 伊藤嘉昭, 中井光男, 実野孝久, 中塚正大, 三間圀興, GODグループ, 高木勝, 中井貞雄, Tグループ, 井澤靖和, Mグループ, OTグループ, 山中千代衛

秋の分科会講演予稿集 1986 ( 4 ) 259 - 259 1986年9月
29a-N-7 キャビティプラズマの振舞いと輻射駆動爆縮の一様性

白神宏之, 島田耕治, 加藤義章, 中井光男, 西村博明, 実野孝久, 中塚正大, 三間圀興, GODグループ, 高木勝, 中井貞雄, Tグループ, 井沢靖和, Mグループ, 山中千代衛

秋の分科会講演予稿集 1986 ( 4 ) 258 - 258 1986年9月
29a-N-4 キャノンボールターゲットにおけるキャビティー閉塞と高エネルギー粒子の発生

坂和洋一, 西村博明, 中井光男, 実野孝久, 中塚正大, 三間圀興, 白神宏之, 遠藤琢磨, 亀井克哉, 加藤義章, 田中和夫, 望月孝晏, GODグループ, 中井貞雄, Tグループ, 井沢靖和, Mグループ, 山中千代衛

秋の分科会講演予稿集 1986 ( 4 ) 257 - 257 1986年9月
30a-L-10 キャノンボールターゲットにおける内球の動過程の観測 : X線バックライトストリーク

島田耕治, 浦崎智文, 伊藤嘉昭, 西村博明, 中井光男, 藤田雅之, 矢部孝, 中塚正大, 実野孝久, 三間圀興, 井沢靖和, 山中千代衛

秋の分科会講演予稿集 1986 ( 4 ) 271 - 271 1986年9月
30a-L-11 Radiation trapping effects in analysis of the x-ray line intensity ratio with HAM

矢部孝, 伊藤基志, 三間圀興, 畦地宏, 中井光男

秋の分科会講演予稿集 1986 ( 4 ) 272 - 272 1986年9月
1a-BA-1 激光XII号2ω光による爆縮プラズマの面密度(プラズマ物理・核融合(原子過程とプラズマ診断))

山中正宣, 井門俊治, 畦地宏, 宮永憲明, Stapf R. O., 糸賀賢二, 中石博之, 陳延偉, 島田義則, 中上宣章, 山下隆久, 中井光男, 桜井浩司, 坂和洋一, 竹居栄治, 西村博明, 井澤靖和, 実野孝久, 中塚正大, GODグループ, 吉田国雄, OTグループ, 高木勝, 乗松孝好, 中井貞雄, Tグループ, 辻龍介, 西原功修, 矢部孝, 山中龍彦, 山中千代衛

年会講演予稿集 41 ( 4 ) 240 - 240 1986年3月
1a-BA-7 レーザー生成プラズマからの軟X線計測とその較正(プラズマ物理・核融合(原子過程とプラズマ診断))

近藤公伯, 西村博明, 浦崎智文, 桜井浩司, 内田成明, 中井光男, 伊藤嘉昭, 宮永憲明, 畦地宏, 井澤靖和, 山中千代衛

年会講演予稿集 41 ( 4 ) 243 - 243 1986年3月
30a-BB-1 激光X II号グリーンビームによる高性能圧縮 : 多重ショック圧縮とコアパラメーター(プラズマ物理・核融合(レーザー核融合))

中井貞雄, 矢部孝, 井澤靖和, 山中正宣, 西村博明, 宮永憲明, 畦地宏, 中井光男, 内田成明, Stapf R., 坂和洋一, 糸賀賢二, 中石博之, 長谷川裕, 桜井浩司, 近藤公伯, 浦崎智文, 乗松孝好, 高木勝, 中塚正大, 実野孝久, 西原功修, 三間圀興, 高部英明, 田中和夫, 望月孝晏, 加藤義章, 山中龍彦, 山中千代衛

年会講演予稿集 41 ( 4 ) 189 - 189 1986年3月
30a-BB-5 激光XII号グリーンビームによる高性能圧縮 : 爆縮のダイナミックス(プラズマ物理・核融合(レーザー核融合))

桜井浩司, 内田成明, 中井貞雄, 矢部孝, 井沢靖和, 山中正宣, 西村博明, 宮永憲明, 畦地宏, 中井光男, Stapf R., 坂和洋一, 糸賀賢二, 中石博之, 長谷川裕, 近藤公伯, 浦崎智文, 乗松孝好, 高木勝, 中塚正大, 実野孝久, 西原功修, 三間圀興, 高部英明, 田中和夫, 望月孝晏, 加藤義章, 山中龍彦, 山中千代衛

年会講演予稿集 41 ( 4 ) 191 - 191 1986年3月
30a-BB-4 激光XII号グリーンビームによる高性能圧縮 : アブレーション過程(プラズマ物理・核融合(レーザー核融合))

宮永憲明, 畦地宏, 内田成明, 中井光男, 坂和洋一, 長谷川裕, 乗松孝好, 高木勝, 実野孝久, 西村博明, 山中正宣, 西原功修, 三間圀興, 矢部孝, 井沢靖和, 山中龍彦, 中井貞雄, 山中千代衛, 中塚正大, Mグループ, Tグループ, GODグループ, OTグループ

年会講演予稿集 41 ( 4 ) 190 - 190 1986年3月
Absolute calibration of a soft x-ray streak camera.

SPIE Proc. 689 1986年
Spectroscopic measurement of non-local heat transport in laser produced plasma.

Proceedings of the workshop of US-Japan Fusion Collab. 1986年
2p-K-10 激光XII号2ω光による爆縮プラズマからの非線形散乱

坂和洋一, 西村博明, 中井光男, 畦地宏, 田中和夫, 井澤靖和, 山中龍彦, 山中千代衛

秋の分科会講演予稿集 1985 ( 4 ) 224 - 224 1985年9月
2p-K-5 球状レーリーティラーモードの時間発展

三間圀興, 高部英明, 服部文秀, 井澤靖和, 西村博明, 中井光男, 畦地宏, 宮永憲明, 加藤義章, 矢部孝, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1985 ( 4 ) 221 - 221 1985年9月
2p-K-4 アブレーション圧縮における不安定性の観測

西村博明, 畦地宏, 中井光男, 内田成明, 坂和洋一, 長谷川裕, 桜井浩司, 近藤公伯, 浦崎智文, 井澤靖和, 高部英明, 三間圀興, 中塚正大, 阪部周二, 実野孝久, 乗松孝好, 高木勝, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1985 ( 4 ) 221 - 221 1985年9月
2p-K-3 激光XII号2ω光によるアブレーティブ圧縮

中井貞雄, 山中龍彦, 加藤義章, 望月孝晏, 山中正宣, 宮永憲明, 畦地宏, 西村博明, 仁木秀明, 中井光男, 内田成明, Stapf R, 坂和洋一, 糸賀賢二, 長谷川裕, 中石博之, 遠藤琢磨, 井澤靖和, 乗松孝好, 中塚正大, 阪部周二, 実野孝久, 藤原閲夫, 吉田國男, 西原功修, 三間圀興, 矢部孝, 高部英明, 山中千代衛

秋の分科会講演予稿集 1985 ( 4 ) 220 - 220 1985年9月
31a-A8-10 ポストパルスによるアブレーティブ圧縮ターゲットの圧縮コア計測(プラズマ物理・核融合(レーザー核融合))

内田成明, 中井光男, 西原功修, 西村博明, 畦地宏, 山中龍彦, 山中千代衛, Sグループ, Tグループ, Mグループ, Gグループ, OTグループ

年会講演予稿集 40 ( 4 ) 115 - 115 1985年3月
31a-A8-11 温度勾配の大きいレーザープラズマ中での熱輸送(プラズマ物理・核融合(レーザー核融合))

中井光男, 畦地宏, 宮永憲明, 内田成明, 西村博明, 矢部孝, 山中龍彦, 中井貞雄, 山中千代衛, Mグループ, Gグループグループ, OTグループ, Tグループ

年会講演予稿集 40 ( 4 ) 115 - 115 1985年3月
Improvement of Energy Resolution in Neutron Time-of-Flight Measurement.

ILE Quarterly Progress Repts. 1985年
31a-A8-8 レーザー生成キャビティープラズマ中での散乱光計測(プラズマ物理・核融合(レーザー核融合))

畦地宏, 桜井浩司, 内本洋, 山中龍彦, 山中千代衛, GMIIグループ, 西村博明, 中井光男, 内田成明, 和田和久, 長谷川裕, 坂和洋一, 荒井康, 遠藤琢磨

年会講演予稿集 40 ( 0 ) 114 - 114 1985年
31a-A8-9 レーザー生成キャビティープラズマ中での高エネルギー粒子発生(プラズマ物理・核融合(レーザー核融合))

西村博明, 桜井浩司, 内本洋, 山中龍彦, 山中千代衛, 畦地宏, 中井光男, 内田成明, 和田知久, 長谷川裕, 坂和洋一, 荒井康, 遠藤琢磨

年会講演予稿集 40 ( 0 ) 114 - 114 1985年
3a-F-11 激光XII号核融合実験における爆縮のダイナミクス

内田成明, 中井光男, 畦地宏, 井門俊治, 山中龍彦, 山中千代衛

秋の分科会講演予稿集 1984 ( 4 ) 133 - 133 1984年9月
3a-F-7 激光XII号核融合実験における高周波と超高速電子の発生

畦地宏, 中井光男, 西村博明, 和田和久, 山中龍彦, 山中千代衛

秋の分科会講演予稿集 1984 ( 4 ) 131 - 131 1984年9月
1133 体育授業における態度評価(11.体育科教育学,一般研究)

中井光男, 広橋義敬, 金原勇

日本体育学会大会号 35 ( 0 ) 1984年
11p-DH-8 レーザー核融合におけるプレヒート制御の研究

田中正和, 中井光男, 内田成明, 山中龍彦, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1983 ( 4 ) 120 - 120 1983年9月
27p-B-7 レーザープラズマのアブレーション領域における熱輸送および流体運動の研究

中井光男, 畦地宏, 水谷太, 田中正和, 阪本英男, 内田成明, 山中龍彦, 山中千代衛

年会講演予稿集 38 ( 4 ) 92 - 92 1983年3月
1a-J-10 熱伝導のレーザー波長依存性(1.0, 0.5, 0.35, 0.25μm)

山中龍彦, 水谷太, 中井光男, 矢部孝, 田中正和, 阪本英男, 中井貞雄, 山中千代衛

年会講演予稿集 37 ( 4 ) 140 - 140 1982年9月
2a-SB-12 蛍光X線法によるレーザープラズマのエネルギースペクトル計測

水谷太, 阪本英男, 中井光男, 田中正和, 山中龍彦, 中井貞雄, 山中千代衛

年会講演予稿集 37 ( 4 ) 155 - 155 1982年9月
1p-Y-6 激光IV号グリーンヒームによる爆縮の比例則

中井光男, 水谷太, 田中正和, 山中龍彦, 中井貞雄, 田中千代衛

春の分科会予稿集 1982 ( 4 ) 154 - 154 1982年3月
EFFICIENT GREEN-BEAM IMPLOSION EXPERIMENTS

T YAMANAKA, H AZECHI, M NAKAI, T YABE, H SHIRAGA, F MIZUTANI, S NAKAI, M YAMANAKA, C YAMANAKA

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY 28 ( 2-3 ) 272 - 273 1982年
Pellet Implosion by Green Beam.

Technol. Repts. Osaka Univ. 32 1982年
YAGレーザーによるSOSスクライビング技術の開発

山田明孝, 五十嵐昇一, 高橋寿男, 井上広治, 関口紀昭, 寺井清寿, 加藤利哉, 井上満夫, 大道博行, 藤田尚徳, 的場幹史, 吉田史郎, 吉田国雄, 中井貞雄, 山中千代衛, 川瀬真一, 小倉一樹, 竪山隆治, 山本秀俊, 国友浩一, 伊藤靖明, 小原実藤, 竹内文治, 藤岡知夫, 間淵義宏, 北川博己, 斎藤比佐実, 田中勲夫, 長縄一男, 阪上幸男, 有馬泉, 椿原啓, 久保宇市, 石川憲, 松嶋功, 大和田野, 芳郎, 矢尾板昭, 根本房司, 葛西彪, 矢野雅昭, 八木誠, 西村博明, 松岡不識, 山田家和勝, 吉野洋一, 山中龍彦, 藤原啓司, 纐纈達也, 金辺忠, 有永真司, 宮永憲明, 北川米喜, 矢部孝, 中塚正大, 加藤義章, 宮川敏夫, 畦地宏, 白神宏之, 中井光男, 水谷太, 山根毅士, 加茂悦寛, 辰巳龍司

レーザー研究 10 ( 0 ) 63 - 65,70 1982年
2p-NZ-9 激光IV号グリーンビームによるペレット爆縮

中井光男, 畦地宏, 水谷太, 山中龍彦, 中井貞雄, 山中千代衛

秋の分科会講演予稿集 1981 ( 4 ) 113 - 113 1981年9月
30p-C-13 レーザープラズマにおける圧縮の安定性

Raven A., 畦地宏, 松尾敏伸, 中井光男, 水谷太, 山中龍彦, 山中千代衛

年会予稿集 36 ( 4 ) 62 - 62 1981年3月
30p-C-17 レーザー核融合における高密度圧縮II : 圧縮率の比例則

中井光男, 松尾敏伸, 水谷太, Raven A., 畦地宏, 山中龍彦, 山中千代衛

年会予稿集 36 ( 4 ) 64 - 64 1981年3月

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講演・口頭発表等

The elements of a small debris mitigation system using spaceborne laser 国際共著

S. Uchida, K. Kawakami, H. Okamura, M. Nakai, K. Shibata, X. Xiao, Y. Danqing, K. Zhang, Z. Heng

2nd International Orbital Debris Conference 2023年12月 2nd International Orbital Debris Conference committee

Works（作品等）

極端紫外(EUV)光源開発等の先進半導体製造技術の実用化

2004年

受賞

応用物理学会優秀論文賞

2024年3月応用物理学会

余語覚文、有川安信、安部勇輝、森隆人、朴木裕貴、古賀啓資、鈴木洋介、金崎真聡、藤岡慎介、中井光男、早川岳人、三間圀興、西村博明、兒玉了祐
論文賞

2005年11月プラズマ・核融合学会

中井光男
技術進歩賞

2002年11月プラズマ・核融合学会

中井光男
レーザー学会奨励賞

1998年

共同研究・競争的資金等の研究

Development of high-speed X-ray framing camera

The Other Research Programs
爆風波の安定性に関する研究

その他の研究制度
レーザー爆縮の安定性に関する研究

その他の研究制度
レーザー爆縮の安定性

その他の研究制度
Study on implosion stability of ICF pellets

The Other Research Programs
Higherorder Harmonic Generation

The Other Research Programs
Experimental study on blast wave

The Other Research Programs

▼全件表示

担当経験のある授業科目

電気機器

2023年4月

-

2024年3月
機関名：福井工業大学