The magnetic component of geodesic acoustic modes in tokamak plasmas with a radial equilibrium electric field

被引：9
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 | 2016年 / 23卷 / 10期
关键词：
ZONAL FLOWS; OSCILLATIONS; EXPLANATION;
D O I：
10.1063/1.4964142
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 with a magnetic perturbation in the tokamak plasma with an equilibrium radial electric field was derived. The dispersion relation was analyzed for very low field strength. The mode frequency decreases with increasing field strength, which is different from the electrostatic geodesic acoustic mode. There exists an m = 1 magnetic component that is very low when the radial electric field is absent. The ratio between the m = 1 and m = 2 magnetic components increases with strength of the radial electric field for low Mach numbers. Published by AIP Publishing.
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页数：6
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