Stability of Alfven modes in a collisionless anisotropic plasma confined by a highly curved magnetic field

被引:2
作者
Grigor'ev, I. A. [1 ]
Pastukhov, V. P. [1 ]
机构
[1] IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, Russia
基金
俄罗斯基础研究基金会;
关键词
D O I
10.1134/S1063780X08040028
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 stability of Alfven modes in a collisionless plasma with an anisotropic pressure in a highly curved magnetic field is studied. A linearized equation for describing longitudinally nonuniform MHD perturbations with frequencies below the bounce frequency is derived. In this equation, the perturbations of longitudinal and transverse pressures are calculated using a collisionless kinetic equation. It is shown that longitudinal fluxes of the transverse and longitudinal plasma energies give rise to pressure perturbations different from those in the Chew-Goldberger-Low collisionless hydrodynamics. The corresponding energy principle is constructed. A stability criterion for Alfven modes is obtained and is found to be more stringent than that in the Chew-Gold-berger-Low model.
引用
收藏
页码:265 / 277
页数:13
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