Geodesic acoustic modes in tokamak plasmas with a radial equilibrium electric field

被引：6
作者：
Zhou, Deng [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230031, Peoples R China
来源：
PHYSICS OF PLASMAS | 2015年 / 22卷 / 09期
关键词：
ZONAL FLOWS; STABILITY;
D O I：
10.1063/1.4930132
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 dispersion relation of geodesic acoustic modes in the tokamak plasma with an equilibrium radial electric field is derived and analyzed. Multiple branches of eigenmodes have been found, similar to the result given by the fluid model with a poloidal mass flow. Frequencies and damping rates of both the geodesic acoustic mode and the sound wave increase with respect to the strength of radial electric field, while the frequency and the damping rate of the lower frequency branch slightly decrease. Possible connection to the experimental observation is discussed. (C) 2015 AIP Publishing LLC.
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页数：5
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