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through directional Compton profile measurementKoizumi, Akihisa*; Kubo, Yasunori*; Yamamoto, Etsuji; Haga, Yoshinori; Sakurai, Yoshiharu*
Journal of the Physical Society of Japan, 88(3), p.034714_1 - 034714_6, 2019/03
Times Cited Count：2 Percentile：21.15(Physics, Multidisciplinary)Sasao, Hajime; Arakawa, Hiroyuki*; Kubo, Hirotaka; Kawano, Yasunori; Itami, Kiyoshi
Review of Scientific Instruments, 85(8), p.086106_1 - 086106_3, 2014/08
Times Cited Count：2 Percentile：11.24(Instruments & Instrumentation)Si and YbTZn
(T: Co, Rh, Ir)Onuki, Yoshichika; Yasui, Shinichi*; Matsushita, Masaki*; Yoshiuchi, Shingo*; Oya, Masahiro*; Hirose, Yusuke*; Dung, N. D.*; Honda, Fuminori*; Takeuchi, Tetsuya*; Settai, Rikio*; et al.
Journal of the Physical Society of Japan, 80(Suppl.A), p.SA003_1 - SA003_6, 2011/12
ZnTakeuchi, Tetsuya*; Yasui, Shinichi*; Toda, Masatoshi*; Matsushita, Masaki*; Yoshiuchi, Shingo*; Oya, Masahiro*; Katayama, Keisuke*; Hirose, Yusuke*; Yoshitani, Naohisa*; Honda, Fuminori*; et al.
Journal of the Physical Society of Japan, 79(6), p.064609_1 - 064609_15, 2010/06
Times Cited Count：42 Percentile：83.7(Physics, Multidisciplinary)ZnYoshiuchi, Shingo*; Toda, Masatoshi*; Matsushita, Masaki*; Yasui, Shinichi*; Hirose, Yusuke*; Oya, Masahiro*; Katayama, Keisuke*; Honda, Fuminori*; Sugiyama, Kiyohiro*; Hagiwara, Masayuki*; et al.
Journal of the Physical Society of Japan, 78(12), p.123711_1 - 123711_4, 2009/12
Times Cited Count：39 Percentile：82.77(Physics, Multidisciplinary)Kawano, Yasunori; Nakano, Tomohide; Isayama, Akihiko; Asakura, Nobuyuki; Tamai, Hiroshi; Kubo, Hirotaka; Takenaga, Hidenobu; Bakhtiari, M.; Ide, Shunsuke; Kondoh, Takashi; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 81(8), p.593 - 601, 2005/08
An experiment to investigate mitigation effects of impurity pellet injection on disruption generated runaway electrons was carried out in the JT-60U tokamak device. Deposition of impurity neon pellets into a post-disruption runaway plasma was observed with increment of bulk electron density. At the impurity pellet injection, decay time of runaway current became shorter as factor of 
2. There was an approximately linear relationship between changes in decay rate of runaway current and a photo-neutron signal which indicated loss of runaway electrons from the plasma. Consequently, enhanced loss of runaway electrons from a tokamak plasma, hence mitigation effect on them, by injection of impurity neon pellets was found.
Kawano, Yasunori; Nakano, Tomohide; Isayama, Akihiko; Hatae, Takaki; Konoshima, Shigeru; Oyama, Naoyuki; Kondoh, Takashi; Tamai, Hiroshi; Kubo, Hirotaka; Asakura, Nobuyuki; et al.
Europhysics Conference Abstracts (CD-ROM), 29C, 4 Pages, 2005/00
In order to mitigate the post-disruption runaway electrons, experiments has been carried out with impurity pellet injection. As a result, we have observed the prompt exhaust of the runaway electrons and the reduction of runaway plasma. We have presented one possible explanation for basic behavior of the runaway plasma current that it follows the balance of the avalanche generation of runaway electrons and their slowing down predicted by the model, including effects by synchrotron radiation. On the other hand, standing on the fact that the current quench time is extended by runaway electrons, the experiment for avoiding the current quench by runaway electrons has been carried out. The runaway electrons reinforced the discharge to survive against the low Te of less than several tens eV and an additional impurity pellet injection, and thus the plasma current was maintained and terminated as programmed. To study the dynamics of runaway electrons precisely, a new active and direct diagnostic concept using the laser inverse Compton scattering has been proposed.
Sugie, Tatsuo; Hatae, Takaki; Koide, Yoshihiko; Fujita, Takaaki; Kusama, Yoshinori; Nishitani, Takeo; Isayama, Akihiko; Sato, Masayasu; Shinohara, Koji; Asakura, Nobuyuki; et al.
Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.482 - 511, 2002/09
Times Cited Count：6 Percentile：3.03(Nuclear Science & Technology)The diagnostic system of JT-60U (JT-60upgrade) is composed of about 50 individual diagnostic devices. Recently, the detailed radial profile measurements of plasma parameters have been improved, so that the internal structure of plasmas has been explored. The understanding of plasma confinement has been enhanced by density and temperature fluctuation measurements using a mm-wave reflectometer and electron cyclotron emission measurements respectively. In addition, the real-time control experiments of electron density, neutron yield, radiated power and electron temperature gradient have been carried out successfully by corresponding diagnostic devices. These measurements and the real time control contribute to improving plasma performance. Diagnostic devices for next generation fusion devices such as a CO2 laser interferometer/polarimeter and a CO2 laser collective Thomson scattering system have been developed.
Kamada, Yutaka; Fujita, Takaaki; Ishida, Shinichi; Kikuchi, Mitsuru; Ide, Shunsuke; Takizuka, Tomonori; Shirai, Hiroshi; Koide, Yoshihiko; Fukuda, Takeshi; Hosogane, Nobuyuki; et al.
Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.185 - 254, 2002/09
Times Cited Count：34 Percentile：48.48(Nuclear Science & Technology)With the main aim of providing physics basis for ITER and the steady-state tokamak reactors, JT-60/JT-60U has been developing and optimizing the operational concepts, and extending the discharge regimes toward sustainment of high integrated performance in the reactor relevant parameter regime. In addition to achievement of the equivalent break-even condition (QDTeq up to 1.25) and a high fusion triple product = 1.5E21 m-3skeV, JT-60U has demonstrated the integrated performance of high confinement, high beta-N, full non-inductive current drive with a large fraction of bootstrap current in the reversed magnetic shear and in the high-beta-p ELMy H mode plasmas characterized by both internal and edge transport barriers. The key factors in optimizing these plasmas are profile and shape controls. As represented by discovery of various Internal Transport Barriers, JT-60/JT-60U has been emphasizing freedom and restriction of profiles in various confinement modes. JT-60U has demonstrated applicability of these high confinement modes to ITER and also clarified remaining issues.
Kamada, Yutaka; Ushigusa, Kenkichi; Neyatani, Yuzuru; Naito, Osamu; Ozeki, Takahisa; Kawano, Yasunori; Yoshino, Ryuji; Kubo, Hirotaka; Fujita, Takaaki; Ishida, Shinichi; et al.
IAEA-CN-60/A5-5, 0, p.651 - 661, 1995/00
no abstracts in English
Higashijima, Satoru*; Sugie, Tatsuo; Kubo, Hirotaka; Tsuji, Shunji; Shimada, Michiya; Asakura, Nobuyuki; Hosogane, Nobuyuki; Kawano, Yasunori; Nakamura, Hiroo; Itami, Kiyoshi; et al.
Journal of Nuclear Materials, 220-222, p.375 - 379, 1995/00
Times Cited Count：32 Percentile：92.83(Materials Science, Multidisciplinary)no abstracts in English
Fujii, Tsuneyuki; Saigusa, Mikio; Kimura, Haruyuki; Moriyama, Shinichi; ; Kawano, Yasunori; *; Kubo, Hirotaka; Nishitani, Takeo; *; et al.
Fusion Engineering and Design, 19, p.213 - 223, 1992/00
Times Cited Count：6 Percentile：53.17(Nuclear Science & Technology)no abstracts in English
Sakasai, Akira; Koide, Yoshihiko; Kubo, Hirotaka; Sugie, Tatsuo; Shimada, Michiya; Hirayama, Toshio; Asakura, Nobuyuki; Kawano, Yasunori; Hosogane, Nobuyuki; Nakamura, Hiroo
Journal of Nuclear Materials, 196-198, p.472 - 475, 1992/00
Times Cited Count：3 Percentile：35.32(Materials Science, Multidisciplinary)no abstracts in English
Kubo, Hirotaka; Shimada, Michiya; Sugie, Tatsuo; Hosogane, Nobuyuki; Itami, Kiyoshi; Tsuji, Shunji; Nakamura, Hiroo; Asakura, Nobuyuki; Sakasai, Akira; Kawano, Yasunori; et al.
Journal of Nuclear Materials, 196-198, p.71 - 79, 1992/00
Times Cited Count：26 Percentile：88.97(Materials Science, Multidisciplinary)no abstracts in English
Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.
Nuclear Fusion, 32(8), p.1313 - 1330, 1992/00
Times Cited Count：7 Percentile：33.11(Physics, Fluids & Plasmas)no abstracts in English
Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.
JAERI-M 91-195, 47 Pages, 1991/11
no abstracts in English
Sugie, Tatsuo; Kubo, Hirotaka; Sakasai, Akira; Koide, Yoshihiko; Hirayama, Toshio; Shimada, Michiya; Itami, Kiyoshi; Kawano, Yasunori; Nishitani, Takeo; Nagashima, Keisuke; et al.
Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.287 - 306, 1991/03
no abstracts in English
Itami, Kiyoshi; Fukuda, Takeshi; Ikeda, Yoshitaka; Imai, Tsuyoshi; Kawano, Yasunori; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Tsuji, Shunji; Ushigusa, Kenkichi
Journal of Nuclear Materials, 176-177, p.504 - 511, 1990/12
Times Cited Count：6 Percentile：57.36(Materials Science, Multidisciplinary)no abstracts in English
Tsuji, Shunji; Ushigusa, Kenkichi; Ikeda, Yoshitaka; Imai, Tsuyoshi; Itami, Kiyoshi; Nemoto, Masahiro; Nagashima, Keisuke; Koide, Yoshihiko; Kawano, Yasunori; Fukuda, Takeshi; et al.
Physical Review Letters, 64(9), p.1023 - 1026, 1990/02
Times Cited Count：55 Percentile：88.38(Physics, Multidisciplinary)no abstracts in English
Kubo, Hirotaka; Sugie, Tatsuo; *; Sakasai, Akira; Koide, Yoshihiko; Akaoka, Nobuo*; Nishitani, Takeo; Itami, Kiyoshi; Kawano, Yasunori; Nagashima, Keisuke; et al.
IAEA-TECDOC-536, p.139 - 144, 1990/00
no abstracts in English
