Papers - Nakai Mitsuo

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   1990.10

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   1990.10

3-DIMENSIONAL IMAGING OF LASER IMPLODED TARGETS Reviewed

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

JOURNAL OF APPLIED PHYSICS   68 ( 4 )   1483 - 1488   1990.8

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]   1990.8

3a-T-7 X-Ray Driven Fusion-III : Core Parameters

Endo T., Shiraga H., Nishimura H., Takabe H., Sakabe S., Kato Y., Nakai S., GOD-group, M-group, T-group, OT-group

Meeting Abstracts of the Physical Society of Japan   1990.4   190   1990

Three-Dimensional Temperature Distribution Measurement of Laser Imploded Core Plasma by use of X-Ray Emission Computed Tomography

NAKAI Mitsuo, SHINOHARA Seiichi, KATAYAMA Makoto, CHIN Yen-Uei, MIYANAGA Noriaki, TANAKA Kazuo, YAMANAKA Nasanobu, NISHIHARA Katsunobu, YAMANAKA Tasuhiko, NAKAI Sadao

ITE Technical Report   14 ( 31 )   53 - 57   1990

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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.

A monitoring system for the real-time characterization of cryogenic fuel layer in laser-fusion targets.

TSUKAMOTO Masahiro, NAKAI Sadao, KODAMA Ryosuke, KADO Masataka, ITO Hajime, YASUMOTO Masaki, NORIMATSU Takayoshi, NAKAI Mitsuo, TANAKA Kazuo A, YAMANAKA Tatsuhiko

The Review of Laser Engineering   18 ( 9 )   724 - 731   1990

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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.

X-ray Pinhole Camera with Fluorescent Screen Coupled with CCD

Tanaka Kazuo, Shinohara Seiichi, Nakai Mitsuo, Yamanaka Tatsuhiko, Nakai Sadao

ITE Technical Report   13 ( 29 )   1 - 4   1989

X-RAY FRAMING CAMERA IMAGES OF IMPLODING TARGETS Reviewed

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

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   1988.11

HYDRODYNAMIC INSTABILITY IN AN ABLATIVELY IMPLODED TARGET IRRADIATED BY HIGH-POWER GREEN LASERS Reviewed

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   1988.10

SCALINGS OF IMPLOSION EXPERIMENTS FOR HIGH NEUTRON YIELD Reviewed

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

DEVELOPMENT OF SUPRA-HIGHT SPEED X-RAY FRAMING CAMERA

KATAYAMA Makoto, NAKAI Mitsuo, NISHIMURA Hiroaki, YAMANAKA Tatsuhiko, IZAWA Yasukazu, NAKAI Sadao, YAMANAKA Chiyoe

ITE Technical Report   12 ( 22 )   27 - 34   1988

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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.

X-Ray Emission Computed Tomography of Laser-Produced Plasma

CHEN Ven-Wei, NISHIHARA Katsunobu, SHIMA Kyoko, MIYANAGA Noriaki, AZECHI Hiroshi, NAKAI Mitsuo, TANAKA Kazuo, YAMANAKA Masanobu, YAMANAKA Tatsuhiko, NAKAI Sadao, TAMURA Shinichi

ITE Technical Report   12 ( 22 )   15 - 20   1988

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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 Reviewed

Y SAKAWA, KA 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   1987.10

OBSERVATION OF HYDRODYNAMIC INSTABILITY IN SPHERICAL TARGET IMPLOSION WITH A GEKKO-XII GREEN LASER Reviewed

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   1986.8

SUPRATHERMAL ELECTRON GENERATION IN CANNONBALL TARGETS Reviewed

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   1986.1

LASER IMPLOSION OF HIGH ASPECT-RATIO TARGETS PRODUCES THERMONUCLEAR NEUTRON YIELDS EXCEEDING 10(12) BY USE OF SHOCK MULTIPLEXING Reviewed

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

Laser Fusion Implosion Experiments

IZAWA Yasukazu, MIYANAGA Noriaki, NIKI Hideaki, TANAKA Kazuo A, MOCHIZUKI Takayasu, KITAGAWA Yoneyoshi, NAKAI Mitsuo, SHIRAGA Hiroyuki, YAMANAKA Masanobu, YAMANAKA Tatsuhiko, AZECH Hiroshi

The Review of Laser Engineering   14 ( 12 )   1090 - 1132   1986

MEASUREMENTS OF INTENSITY SCALING OF ABLATION PRESSURE AT 10.6 MU-M AND 1.05 MU-M LASER WAVELENGTHS Reviewed

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