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plasma operationTamai, Hiroshi; Akiba, Masato; Azechi, Hiroshi*; Fujita, Takaaki; Hamamatsu, Kiyotaka; Hashizume, Hidetoshi*; Hayashi, Nobuhiko; Horiike, Hiroshi*; Hosogane, Nobuyuki; Ichimura, Makoto*; et al.
Nuclear Fusion, 45(12), p.1676 - 1683, 2005/12
Times Cited Count：15 Percentile：45.44(Physics, Fluids & Plasmas)Design studies are shown on the National Centralized Tokamak facility. The machine design is carried out to investigate the capability for the flexibility in aspect ratio and shape controllability for the demonstration of the high-beta steady state operation with nation-wide collaboration, in parallel with ITER towards DEMO. Two designs are proposed and assessed with respect to the physics requirements such as confinement, stability, current drive, divertor, and energetic particle confinement. The operation range in the aspect ratio and the plasma shape is widely enhanced in consistent with the sufficient divertor pumping. Evaluations of the plasma performance towards the determination of machine design are presented.
Kishimoto, Hiroshi; Ishida, Shinichi; Kikuchi, Mitsuru; Ninomiya, Hiromasa
Nuclear Fusion, 45(8), p.986 - 1023, 2005/08
Times Cited Count：40 Percentile：28.81(Physics, Fluids & Plasmas)The Japanese large tokamak JT-60 has been focusing its research emphases to develop a high performance plasma, namely high confinement, high temperature and high density, and to sustain it non-inductively for a long time with possible minimization of external power input. The first demonstration of high bootstrap current discharges in a high-poloidal-beta mode (high-p) and the concept development of a steady-state tokamak reactor SSTR based on this experimental achievement initiated the so-called "advanced tokamak research". The first observation of internal transport barriers in the JT-60 high-p mode was followed by the world-wide explorations of reversed shear discharges associated with internal transport barriers. The advanced tokamak research is now the major trend of the current tokamak development. A new concept of compact ITER was developed and proposed in the context of this advanced tokamak approach pursued on JT-60.
Tamai, Hiroshi; Kurita, Genichi; Matsukawa, Makoto; Urata, Kazuhiro*; Sakurai, Shinji; Tsuchiya, Katsuhiko; Morioka, Atsuhiko; Miura, Yushi; Kizu, Kaname; Kamada, Yutaka; et al.
Plasma Science and Technology, 6(3), p.2281 - 2285, 2004/06
Times Cited Count：0 Percentile：0.02(Physics, Fluids & Plasmas)High performance steady-state operation for JT-60SC are evaluated by the TOPICS analysis. 
5 and bootstrap current fraction 86% is kept steady at I
=1.5 MA, B
=2 T by neutral beam power of 11 MW. The ERATO-J analysis shows that the external-kink mode with multiple toroidal mode numbers of n=1 and n=2 is stable at 
5.5 at the average ratio of conducting wall radius to plasma minor radius of about 1.2 with the wall stabilisation effect. Resistive wall modes, induced by a close location of the wall to plasma, is expected to be suppressed by the active feedback stabilisation with a set of non-axisymmetric field coils behind the stabilising plates. Further optimisation for the high- accessibility by the plasma shaping is performed with the TOSCA analysis. The plasma shaping factor defined as S=(I/aB)q
and strongly correlated to the plasma elongation and triangularity, is scanned from 4 to 6, which extends the availability of current and pressure profile control for the high performance plasma operation.
Nishitani, Takeo; Ishida, Shinichi; Kikuchi, Mitsuru; Azumi, Masafumi; Yamagiwa, Mitsuru; Fujita, Takaaki; Kamada, Yutaka; Kawano, Yasunori; Koide, Yoshihiko; Hatae, Takaki; et al.
Nuclear Fusion, 34(8), p.1069 - 1079, 1994/00
Times Cited Count：29 Percentile：68.99(Physics, Fluids & Plasmas)no abstracts in English
D.A.Humphreys*; Yoshino, Ryuji
JAERI-M 92-069, 25 Pages, 1992/05
no abstracts in English
Ishida, Shinichi; Koide, Yoshihiko; Tsuji, Shunji; Naito, Osamu; Ozeki, Takahisa; Shirai, Hiroshi;
Kaku Yugo Kenkyu, 65(SPECIAL ISSUE), p.201 - 223, 1991/03
no abstracts in English
; Tsunematsu, Toshihide; ; ; Takeda, Tatsuoki
Nuclear Fusion, 22(5), p.661 - 664, 1982/00
Times Cited Count：12 Percentile：59.46(Physics, Fluids & Plasmas)no abstracts in English
Tokamak; ; ; Tsunematsu, Toshihide; ; ; ; *; Takeda, Tatsuoki
JAERI-M 9787, 25 Pages, 1981/11
no abstracts in English
; Tsunematsu, Toshihide; ; ; ; ; ; *; *; Takeda, Tatsuoki
JAERI-M 9354, 76 Pages, 1981/02
no abstracts in English
