Linear gyrokinetic simulations of reversed shear Alfven eigenmodes and ion temperature gradient modes in DIII-D tokamak

被引：2
|
作者：
WANG, Hongyu [1 ,2 ]
LIU, Pengfei [2 ]
LIN, Zhihong [2 ]
ZHANG, Wenlu [3 ]
机构：
[1] Peking Univ, Fus Simulat Ctr, Beijing 100871, Peoples R China
[2] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
来源：
PLASMA SCIENCE & TECHNOLOGY | 2021年 / 23卷 / 01期
关键词：
fast ions; gyrokinetic simulation; reversed shear Alfvé n eigenmodes; microturbulence; PARTICLE SIMULATION; PLASMAS; PHYSICS; WAVES;
D O I：
10.1088/2058-6272/abc871
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：
Global linear gyrokinetic simulations using realistic DIII-D tokamak geometry and plasma profiles find co-existence of unstable reversed shear Alfven eigenmodes (RSAE) with low toroidal mode number n and electromagnetic ion temperature gradient (ITG) instabilities with higher toroidal mode number n. For intermediate n = [10, 12], RSAE and ITG co-exist and overlap weakly in the radial domain with similar growth rates but different real frequencies. Both RSAE and ITG growth rates decrease less than 5% when compressible magnetic perturbations are neglected in the simulations. The ITG growth rates increase less than 7% when fast ions are not included in the simulations. Finally, the effects of trapped electrons on the RSAE are negligible.
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页数：7
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