Journal ArticleDOI
Achievement of high fusion triple product in the JT-60U high βp H mode
M. Mori,S. Ishida,T Ando,K. Annoh,Nobuyuki Asakura,Masafumi Azumi,A.A.E. van Blokland,G.J. Frieling,T. Fujii,Takaaki Fujita,T. Fukuda,A. Funahashi,T. Hatae,M. Hoek,Mitsuru Honda,N. Hosogane,N. Isei,K Itami,Yutaka Kamada,Yasunori Kawano,Mitsuru Kikuchi,H. Kimura,T Kimura,H Kishimoto,A. Kitsunezaki,K Kodama,Y Koide,T. Kondoh,Hirotaka Kubo,M. Kuriyama,M Matsuoka,Y Matsuzaki,N. Miya,M. Nagami,A. Nagashima,O. Naito,Hiroo Nakamura,M. Nemoto,Y. Neyatani,H. Ninomiya,Takeo Nishitani,T Ohga,S. Ohmori,M. Saidoh,A. Sakasai,M. Sato,M. Shimada,Katsuhiro Shimizu,H Shirai,T Sugie,Hiroshi Takeuchi,K Tani,Kenji Tobita,Shunji Tsuji,K. Ushigusa,M. Yamada,I Yonekawa,H. Yoshida,R. Yoshino +58 more
TLDR
In this article, an enhanced confinement state in a high poloidal beta (βp) regime without sawtooth activity has been achieved in JT-60U, where both the edge and the core confinement are improved.Abstract:
Improvement of an enhanced confinement state in a high poloidal beta (βp) regime without sawtooth activity has been achieved in JT-60U. A confinement mode has been demonstrated where both the edge and the core confinement are improved. The attainable βp was also extended to higher values in this improved mode, because of its broader pressure profile. As a result of the improvement in confinement and in attainable βp, the highest value of the fusion triple product has been extended by a factor of 2.5 over that achieved in the 1992 experiments; it has reached (1.1 ± 0.3) × 1021 m-3.s.keV with a central ion temperature of about 37 keV. The D-D neutron emission rate has also been doubled in these experiments and has reached (5.6 ± 0.6) × 1016 s-1read more
Citations
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Journal ArticleDOI
Chapter 2: Plasma confinement and transport
E. J. Doyle,Wayne A Houlberg,Yutaka Kamada,V. S. Mukhovatov,T.H. Osborne,A. R. Polevoi,G. Bateman,J. W. Connor,J. G. Cordey,T. Fujita,Xavier Garbet,T. S. Hahm,L. D. Horton,A. E. Hubbard,F. Imbeaux,Frank Jenko,J. E. Kinsey,Yasuaki Kishimoto,J.X. Li,T. C. Luce,Y. R. Martin,M. Ossipenko,V.V. Parail,A. G. Peeters,T. L. Rhodes,J. E. Rice,C. M. Roach,V. A. Rozhansky,F. Ryter,G. Saibene,R. Sartori,A. C. C. Sips,J. A. Snipes,M. Sugihara,E. J. Synakowski,H. Takenaga,Tomonori Takizuka,K. Thomsen,M. R. Wade,H. R. Wilson,Itpa Confinement Database,Itpa Pedestal +41 more
TL;DR: The understanding and predictive capability of transport physics and plasma confinement is reviewed from the perspective of achieving reactor-scale burning plasmas in the ITER tokamak, for both core and edge plasma regions.
Journal ArticleDOI
Models for the pedestal temperature at the edge of H-mode tokamak plasmas
TL;DR: In this article, a prediction model for the temperature at the top of a pedestal at the edge of a high-confinement mode H-mode plasmas was developed.
Journal ArticleDOI
The physics of the International Thermonuclear Experimental Reactor FEAT
TL;DR: The International Thermonuclear Experimental Reactor FEAT design for a long-pulse tokamak burning plasma experiment (R=6.2m, a=2'm, B=5.3'm) is intended to achieve extended burn in inductively driven deuterium-tritium plasmas with the ratio of fusion power to auxiliary heating power, Q, of at least 10 and nominal fusion power output of ∼500 MW as discussed by the authors.
Journal ArticleDOI
Long sustainment of JT-60U plasmas with high integrated performance
Yutaka Kamada,Akihiko Isayama,T. Oikawa,Yoshiteru Sakamoto,N. Hosogane,Hidenobu Takenaga,Y. Kusama,T. Fujita,S. Takeji,T. Ozeki,Y. Ishii,Shinji Tokuda,Kenkichi Ushigusa,O. Naito,S. Ishida,Yoshihiko Koide,T. Fukuda,Tomonori Takizuka,Hiroshi Shirai,T. Hatae,Jt Team +20 more
TL;DR: In this paper, a quasi-steady ELMy high?p H?mode discharge with enhanced confinement and high? stability, where long sustainment time, an increase in absolute fusion performance and extension of the discharge regime towards low q95 (~3) are emphasized.
Journal ArticleDOI
Internal transport barrier with improved confinement in the JT-60U tokamak
Y. Koide,Tomonori Takizuka,S. Takeji,S. Ishida,Kikuchi Mitsuru,Yutaka Kamada,T. Ozeki,Yuzuru Neyatani,Hiroshi Shirai,M. Mori,Shunji Tsuji-Iio +10 more
TL;DR: In this paper, the internal transport barrier (ITB) was studied and the region of steep and, i.e., the ITB front, propagated from the core outwards.
References
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Journal Article
Plasma Physics and Controlled Nuclear Fusion Research
TL;DR: In this paper, the first experiments in JET have been described, which show that this large tokamak behaves in a similar manner to smaller tokak, but with correspondingly improved plasma parameters.
Journal ArticleDOI
Scalings for tokamak energy confinement
P.N. Yushmanov,Tomonori Takizuka,Kurt S. Riedel,O. J. W. F. Kardaun,J.G. Cordey,Stanley Kaye,Douglass E. Post +6 more
TL;DR: In this paper, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scaling and an offset-linear scaling, based on an analysis of the ITER Lmode ECC database.
Journal ArticleDOI
Internal transport barrier on q=3 surface and poloidal plasma spin up in JT-60U high- beta p discharges.
Y. Koide,Kikuchi Mitsuru,M. Mori,Shunji Tsuji,S. Ishida,Nobuyuki Asakura,Yutaka Kamada,Takeo Nishitani,Yasunori Kawano,T. Hatae,Takaaki Fujita,T. Fukuda,Akira Sakasai,Takashi Kondoh,Ryuji Yoshino,Yuzuru Neyatani +15 more
TL;DR: A fast magnetohydrodynamic event localized at the transport barrier triggered the subsequent formation of an edge transport barrier that resulted in the further confinement improvement in the JT-60U tokamak discharges.
Journal ArticleDOI
Effect of Toroidal Field Ripple on Fast Ion Behavior in a Tokamak
TL;DR: In this article, the authors performed computational studies for fast ion behavior in a Tokamak with toroidal field ripple and classified the fast ion loss associated with ripple into two groups; ripple-trapped loss and banana-drift loss.
Journal ArticleDOI
High-temperature plasmas in a tokamak fusion test reactor
J. D. Strachan,M. Bitter,A. T. Ramsey,M. C. Zarnstorff,V. Arunasalam,M. G. Bell,N. L. Bretz,Robert Budny,C. E. Bush,S. L. Davis,H. F. Dylla,P. C. Efthimion,R. J. Fonck,E. Fredrickson,H. P. Furth,Robert James Goldston,L. R. Grisham,B. Grek,R. J. Hawryluk,W. W. Heidbrink,H. W. Hendel,K. W. Hill,H. Hsuan,K. P. Jaehnig,D. L. Jassby,F. Jobes,D. W. Johnson,L. C. Johnson,R. Kaita,J. Kampershroer,R. J. Knize,T. A. Kozub,B. Leblanc,F. Levinton,P.H. La Marche,Dennis M. Manos,D. K. Mansfield,K. McGuire,D. H. McNeill,Dale Meade,S. S. Medley,W. Morris,D. Mueller,E. B. Nieschmidt,D. K. Owens,H. Park,J. Schivell,G. Schilling,G. L. Schmidt,S. D. Scott,S. Sesnic,J. C. Sinnis,F. J. Stauffer,B. C. Stratton,G. D. Tait,G. Taylor,H. H. Towner,M. J. Ulrickson,S. von Goeler,R. Wieland,M. D. Williams,K. L. Wong,S. Yoshikawa,K. M. Young,S. J. Zweben +64 more
TL;DR: The ion temperature and the deuterium-fusion neutron yields were significantly higher than for previous tokamak experiments and the low initial densities were achieved by operation of the Tokamak Fusion Test Reactor with low plasma currents and by extensive limiter conditioning.
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