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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.
Ninomiya, Hiromasa; Takamura, Shuichi*; Wakatani, Masahiro*; Fujita, Takaaki; Fukuda, Takeshi; Toi, Kazuo*; Ogawa, Yuichi*; Takizuka, Tomonori; Miura, Yukitoshi; Hatae, Takaki; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 78(7), p.692 - 694, 2002/07
The second ITPA (International Tokamak Physics Activity) meeting was held at General Atomics (San Diego) and Princeton Plasma Physics Laboratory (Princeton) in U.S.A. In the meeting, topical physics group meetings of "Coordinating Committee", "Transport and Internal Barrier Physics", "Confinement Database and Modeling", "Edge and Pedestal Physics", "Scrape-off-layer and Divertor Physics", and "Diagnostics" were carried out. In getting many participants from Japan, Europe, Russia, ITER international team and U.S.A., the active discussions were carried out. On the other hand, the topical group members concerned that the contribution from Japan will be decreased if the experimental period of JT-60U is reduced. Here, the outline of discussions in each topical group is reported.
Higashijima, Takeshi*; Obara, Kenjiro; Shibanuma, Kiyoshi; Koizumi, Koichi; Kobayashi, Kazuhiro; Oya, Yasuhisa; Shu, Wataru; Hayashi, Takumi; Nishi, Masataka
Fusion Science and Technology, 41(3), p.731 - 735, 2002/05
no abstracts in English
Fujita, Takaaki; Ide, Shunsuke; Kamada, Yutaka; Suzuki, Takahiro; Oikawa, Toshihiro; Takeji, Satoru; Sakamoto, Yoshiteru; Koide, Yoshihiko; Isayama, Akihiko; Hatae, Takaki; et al.
Physical Review Letters, 87(8), p.085001_1 - 085001_4, 2001/08
Times Cited Count：183 Percentile：95.97(Physics, Multidisciplinary)no abstracts in English
Oya, Yasuhisa; Kobayashi, Kazuhiro; Shu, Wataru; Hayashi, Takumi; Ohira, Shigeru; Nakamura, Hirofumi; Iwai, Yasunori; Nishi, Masataka; Higashijima, Takeshi*; Obara, Kenjiro; et al.
Fusion Technology, 39(2-Part2), p.1023 - 1027, 2001/03
no abstracts in English
Fukuda, Takeshi; Takizuka, Tomonori; ; Kamada, Yutaka; Nagashima, Keisuke; Sato, Masayasu; Takenaga, Hidenobu; Ishida, Shinichi; Konoshima, Shigeru; Higashijima, Satoru; et al.
Nuclear Fusion, 37(9), p.1199 - 1213, 1997/00
Times Cited Count：39 Percentile：75.83(Physics, Fluids & Plasmas)no abstracts in English
