Numerical study on wave-induced beam ion prompt losses in DIII-D tokamak

被引：1
|
作者：
Feng, Zhichen [1 ,2 ]
Zhu, Jia [1 ,2 ]
Fu, Guo-Yong [1 ,2 ,3 ]
Heidbrink, W. W. [4 ]
Van Zeeland, M. A. [5 ]
机构：
[1] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China
[3] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA
[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[5] Gen Atom, San Diego, CA 92186 USA
来源：
PHYSICS OF PLASMAS | 2017年 / 24卷 / 08期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
TOROIDAL ALFVEN EIGENMODES;
D O I：
10.1063/1.5000073
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：
A numerical study is performed on the coherent beam ion prompt losses driven by Alfven eigenmodes (AEs) in DIII-D plasmas using realistic parameters and beam ion deposition profiles. The synthetic signal of a fast-ion loss detector (FILD) is calculated for a single AE mode. The first harmonic of the calculated FILD signal is linearly proportional to the AE amplitude with the same AE frequency in agreement with the experimental measurement. The calculated second harmonic is proportional to the square of the first harmonic for typical AE amplitudes. The coefficient of quadratic scaling is found to be sensitive to the AE mode width. The second part of this work considers the AE drive due to coherent prompt loss. It is shown that the loss-induced mode drive is much smaller than the previous estimate and can be ignored for mode stability. Published by AIP Publishing.
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页数：9
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