Analytical solutions for global geodesic acoustic modes in tokamak plasmas

被引：0
|
作者：
V. I. Ilgisonis
L. V. Konoval’tseva
V. P. Lakhin
E. A. Sorokina
机构：
[1] National Research Centre Kurchatov Institute,
[2] Peoples’ Friendship University of Russia,undefined
来源：
Plasma Physics Reports | 2014年 / 40卷
关键词：
Plasma Physic Report; Plasma Phys; Radial Profile; Magnetic Axis; Tokamak Plasma;
D O I：
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中图分类号：
学科分类号：
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.
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页码：843 / 854
页数：11
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