Transport in high-performance plasmas with a transport barrier

被引:20
作者
Wakatani, M [1 ]
机构
[1] Kyoto Univ, Grad Sch Energy Sci, Uji 611, Japan
关键词
D O I
10.1088/0741-3335/40/5/007
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
In recent tokamak experiments several types of high-performance plasmas were obtained. One is the H (high)-mode triggered by the L (low) to H (high) transition. In this case the transport barrier is generated at the edge region. The obtained high confinement plasmas are characterized by gyro-Bohm-type transport from the scaling law. Another is the negative (central) shear or (enhanced) reverse shear mode with the transport barrier at the inner region close to the minimum point of the safety factor profile. With the internal transport barrier (ITB) the turbulent transport is suppressed significantly; however, the scaling study is primitive for the core plasma. To understand the negative shear configuration with the transport barrier, the high-beta(p) plasmas are useful, since the ion thermal transport is improved without the reversal of magnetic shear. One key ingredient to obtain the above high-performance plasmas is the E x B velocity shear which may suppress the turbulence and associated anomalous transport in general. Shafranov shift is also favourable. However, it is a difficult task to predict by what degree the anomalous transport is suppressed, particularly compared to L-mode plasmas. Some theoretical efforts into the understanding of high-performance plasmas are discussed.
引用
收藏
页码:597 / 608
页数:12
相关论文
共 65 条
[31]   Experimental evidence for the bootstrap current in a tokamak [J].
Kikuchi, M ;
Azumi, M .
PLASMA PHYSICS AND CONTROLLED FUSION, 1995, 37 (11) :1215-1238
[32]   RADIAL STRUCTURE OF HIGH-MODE-NUMBER TOROIDAL MODES IN GENERAL EQUILIBRIUM PROFILES [J].
KIM, JY ;
WAKATANI, M .
PHYSICAL REVIEW LETTERS, 1994, 73 (16) :2200-2203
[33]  
KISHIMOTO Y, 1997, COMMUNICATION
[34]  
KISHIMOTO Y, 1998, P INT IAEA C FUS EN
[35]   INTERNAL TRANSPORT BARRIER ON Q=3 SURFACE AND POLOIDAL PLASMA SPIN-UP IN JT-60U HIGH-BETA(P) DISCHARGES [J].
KOIDE, Y ;
KIKUCHI, M ;
MORI, M ;
TSUJI, S ;
ISHIDA, S ;
ASAKURA, N ;
KAMADA, Y ;
NISHITANI, T ;
KAWANO, Y ;
HATAE, T ;
FUJITA, T ;
FUKUDA, T ;
SAKASAI, A ;
KONDOH, T ;
YOSHINO, R ;
NEYATANI, Y .
PHYSICAL REVIEW LETTERS, 1994, 72 (23) :3662-3665
[36]   QUANTITATIVE PREDICTIONS OF TOKAMAK ENERGY CONFINEMENT FROM FIRST-PRINCIPLES SIMULATIONS WITH KINETIC EFFECTS [J].
KOTSCHENREUTHER, M ;
DORLAND, W ;
BEER, MA ;
HAMMETT, GW .
PHYSICS OF PLASMAS, 1995, 2 (06) :2381-2389
[37]   Higher fusion power gain with current and pressure profile control in strongly shaped DIII-D tokamak plasmas [J].
Lazarus, EA ;
Navratil, GA ;
Greenfield, CM ;
Strait, EJ ;
Austin, ME ;
Burrell, KH ;
Casper, TA ;
Baker, DR ;
DeBoo, JC ;
Doyle, EJ ;
Durst, R ;
Ferron, JR ;
Forest, CB ;
Gohil, P ;
Groebner, RJ ;
Heidbrink, WW ;
Hong, RM ;
Houlberg, WA ;
Howald, AW ;
Hsieh, CL ;
Hyatt, AW ;
Jackson, GL ;
Kim, J ;
Lao, LL ;
Lasnier, CJ ;
Leonard, AW ;
Lohr, J ;
LaHaye, RJ ;
Maingi, R ;
Miller, RL ;
Murakami, M ;
Osborne, TH ;
Perkins, LJ ;
Petty, CC ;
Rettig, CL ;
Rhodes, TL ;
Rice, BW ;
Sabbagh, SA ;
Schissel, DP ;
Scoville, JT ;
Snider, RT ;
Staebler, GM ;
Stallard, BW ;
Stambaugh, RD ;
StJohn, HE ;
Stockdale, RE ;
Taylor, PL ;
Thomas, DM ;
Turnbull, AD ;
Wade, MR .
PHYSICAL REVIEW LETTERS, 1996, 77 (13) :2714-2717
[38]   IMPROVED CONFINEMENT WITH REVERSED MAGNETIC SHEAR IN TFTR [J].
LEVINTON, FM ;
ZARNSTORFF, MC ;
BATHA, SH ;
BELL, M ;
BELL, RE ;
BUDNY, RV ;
BUSH, C ;
CHANG, Z ;
FREDRICKSON, E ;
JANOS, A ;
MANICKAM, J ;
RAMSEY, A ;
SABBAGH, SA ;
SCHMIDT, GL ;
SYNAKOWSKI, EJ ;
TAYLOR, G .
PHYSICAL REVIEW LETTERS, 1995, 75 (24) :4417-4420
[40]   Neoclassical transport in enhanced confinement toroidal plasmas [J].
Lin, Z ;
Tang, WM ;
Lee, WW .
PHYSICAL REVIEW LETTERS, 1997, 78 (03) :456-459