Effect of temperature anisotropy on the dynamics of geodesic acoustic modes

被引：2
|
作者：
Sama, J. N. [1 ]
Biancalani, A. [2 ,3 ]
Bottino, A. [3 ]
Chavdarovski, I. [4 ]
Del Sarto, D. [1 ]
Ghizzo, A. [1 ]
Hayward-Schneider, T. [3 ]
Lauber, Ph. [3 ]
Rettino, B. [3 ]
Vannini, F. [3 ]
机构：
[1] Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54011 Nancy, France
[2] Leonard Vinci Pole Univ, Res Ctr, F-92400 Paris, France
[3] Max Planck Inst Plasma Phys, D-85748 Garching, Germany
[4] Korea Inst Fus Energy, Daejeon 34133, South Korea
来源：
JOURNAL OF PLASMA PHYSICS | 2023年 / 89卷 / 01期
关键词：
fusion plasma; plasma instabilities; plasma simulation; WAVES;
D O I：
10.1017/S0022377823000016
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：
In this work, we revisit the linear gyro-kinetic theory of geodesic acoustic modes (GAMs) and derive a general dispersion relation for an arbitrary equilibrium distribution function of ions. A bi-Maxwellian distribution of ions is then used to study the effects of ion temperature anisotropy on GAM frequency and growth rate. We find that ion temperature anisotropy yields sensible modifications to both the GAM frequency and growth rate as both tend to increase with anisotropy and these results are strongly affected by the electron to ion temperature ratio.
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收藏
页数：15
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