Long-wavelength mirror modes in multispecies plasmas with arbitrary distributions

被引:9
|
作者
Gedalin, M
Balikhin, M
Strangeway, RJ
Russell, CT
机构
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[2] Univ Sheffield, Dept Automat Control & Syst Engn, Sheffield S1 3JD, S Yorkshire, England
[3] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA
关键词
mirror modes; mirror instability; magnetosheath; anisotropy;
D O I
10.1029/2001JA000178
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
[1] We perform a general analysis of the long-wavelength mirror instability in multispecies plasmas with generally non-Maxwellian distributions. The general dispersion relation depends on several moments of the distribution function, in addition to the perpendicular and parallel temperature. A most general condition of the mirror instability is derived that is valid for any gyrotropic distribution functions of the plasma species and any number of species. Deviations of the bi-Maxwellian shape may be favorable for the mirror instability but may also suppress it. The resulting effect is rather sensitive to the details of the distribution function.
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页数:6
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