Analytical solutions for global geodesic acoustic modes in tokamak plasmas

被引：14
|
作者：
Ilgisonis, V. I. [1 ,2 ]
Konoval'tseva, L. V. [2 ]
Lakhin, V. P. [1 ]
Sorokina, E. A. [1 ,2 ]
机构：
[1] Natl Res Ctr Kurchatov Inst, Moscow 123182, Russia
[2] Peoples Friendship Univ Russia, Moscow 117198, Russia
来源：
PLASMA PHYSICS REPORTS | 2014年 / 40卷 / 11期
基金：
俄罗斯基础研究基金会; 俄罗斯科学基金会;
关键词：
N=0 CHIRPING MODE; ZONAL FLOWS; JFT-2M TOKAMAK; EXPLANATION;
D O I：
10.1134/S1063780X14110038
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：
Analytical solutions for global geodesic acoustic modes in the plasma of a tokamak with circular concentric magnetic surfaces are obtained. In the framework of ideal magnetohydrodynamics, an integral equation for eigenvalues (dispersion relation) taking into account toroidal coupling between electrostatic perturbations and electromagnetic perturbations with the poloidal mode number |m| = 2 is derived. In the absence of such coupling, the dispersion relation yields only the standard continuous spectrum. The existence of a global geodesic acoustic mode is analyzed for equilibria with both on-axis and off-axis maxima of the local geodesic acoustic frequency. The analytical results are compared with results of numerical calculations.
引用
收藏
页码：843 / 854
页数：12
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