The toroidicity-induced Alfven eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data

被引:27
作者
Carolipio, EM [1 ]
Heidbrink, WW
Cheng, CZ
Chu, MS
Fu, GY
Jaun, A
Spong, DA
Turnbull, AD
White, RB
机构
[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[2] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08544 USA
[3] Gen Atom Co, San Diego, CA 92186 USA
[4] Royal Inst Technol, Alfven Lab, Stockholm, Sweden
[5] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
关键词
D O I
10.1063/1.1378066
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
The internal structure of the toroidicity-induced Alfven eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink , Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed similar to6%-8% losses at the peak experimental amplitude of deltaB(r)/B(0)similar or equal to2-5x10(-4). (C) 2001 American Institute of Physics.
引用
收藏
页码:3391 / 3401
页数:11
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