論文 - 中井　光男

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

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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.

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