Nonlinear Dynamics of Mirror Instability Revisited

被引：0
|
作者：
Pokhotelov, O. A. [1 ]
Sagdeev, R. Z. [2 ]
Balikhin, M. A. [1 ]
Fedun, V. N. [3 ]
Dudnikova, G. I. [2 ]
机构：
[1] Univ Sheffield, Sheffield, S Yorkshire, England
[2] Univ Maryland, Dept Phys, College Pk, MD 20740 USA
[3] Univ Sheffield, Dept Matemat Aplicada, Sheffield, S Yorkshire, England
来源：
NEW FRONTIERS IN ADVANCED PLASMA PHYSICS | 2010年 / 1306卷
关键词：
Space plasmas; mirror waves; instability; kinetic effects; VELOCITY DISTRIBUTION; PLASMA;
D O I：
暂无
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A nonlinear dynamics of the mirror modes near the instability threshold is revisited. It is shown that the major saturation is provided by modification of the velocity distribution function in the vicinity of small parallel ion velocities. The final relaxation scenario is based on almost resonant particle interaction with mirror modes. The saturated plasma state can be considered as a magnetic counterpart to electrostatic Bernstein-Greene-Kruskal modes. Our analytical model is verified by relevant numerical simulations. Test particle and PIC simulations indeed show that it is a modification of distribution function at small parallel velocities that results in fading away of free energy driving mirror mode. The physical similarity of the mirror and Weibel instabilities is demonstrated. The multipoint satellite measurements in space plasma can be used to validate a proposed scenario.
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页码：136 / +
页数：3
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