Geodesic acoustic mode in anisotropic plasmas using double adiabatic model and gyro-kinetic equation

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	Geodesic acoustic mode in anisotropic plasmas using double adiabatic model and gyro-kinetic equation
	Ren, HJ ; Cao, JT
刊名	PHYSICS OF PLASMAS
	2014
卷号	21 期号:12
ISSN号	1070-664X
通讯作者	Ren, HJ (reprint author), Univ Sci & Technol China, Collaborat Innovat Ctr Adv Fus Energy & Plasma Sc, Hefei 230026, Peoples R China.
中文摘要	Geodesic acoustic mode in anisotropic tokamak plasmas is theoretically analyzed by using double adiabatic model and gyro-kinetic equation. The bi-Maxwellian distribution function for guiding-center ions is assumed to obtain a self-consistent form, yielding pressures satisfying the magnetohydrodynamic (MHD) anisotropic equilibrium condition. The double adiabatic model gives the dispersion relation of geodesic acoustic mode (GAM), which agrees well with the one derived from gyro-kinetic equation. The GAM frequency increases with the ratio of pressures, p(perpendicular to)/p(parallel to), and the Landau damping rate is dramatically decreased by p(perpendicular to)/p(parallel to). MHD result shows a low-frequency zonal flow existing for all p(perpendicular to)/p(parallel to), while according to the kinetic dispersion relation, no low-frequency branch exists for p(perpendicular to)/p(parallel to) greater than or similar to 2. (C) 2014 AIP Publishing LLC.
资助信息	National Natural Science Foundation of China [11105148, 11235009, 11275260]; China National Magnetic Confinement Fusion Science Program [2013GB112011]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59610]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ren, HJ,Cao, JT. Geodesic acoustic mode in anisotropic plasmas using double adiabatic model and gyro-kinetic equation[J]. PHYSICS OF PLASMAS,2014,21(12).
APA	Ren, HJ,&Cao, JT.(2014).Geodesic acoustic mode in anisotropic plasmas using double adiabatic model and gyro-kinetic equation.PHYSICS OF PLASMAS,21(12).
MLA	Ren, HJ,et al."Geodesic acoustic mode in anisotropic plasmas using double adiabatic model and gyro-kinetic equation".PHYSICS OF PLASMAS 21.12(2014).