Linear theory of the mirror instability in non-Maxwellian space plasmas

Details Linear theory of the mirror instability in non-Maxwellian space plasmas Linear theory of the mirror instability in non-Maxwellian space plasmas

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1312p&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A10, pp. SMP 18-1, CiteID 1312, DOI 10.1029/2001JA009125

Physics

Plasma Physics

21

Space Plasma Physics: Waves And Instabilities, Space Plasma Physics: Wave/Particle Interactions, Space Plasma Physics: Kinetic And Mhd Theory

Scientific paper

A unified theory of the mirror instability in space plasmas is developed. In the standard quasi-hydrodynamic approach, the most general mirror-mode dispersion relation is derived and the growth rate of the mirror instability is obtained in terms of arbitrary electron and ion velocity distribution functions. Finite electron temperature effects and arbitrary electron temperature anisotropies are included. The new dispersion relation allows the treatment of more general space plasma equilibria such as the Dory-Guest-Harris (DGH) or Kennel-Ashour-Abdalla (KA) loss cone equilibria, as well as distributions with power law velocity dependence that are modeled by the family of κ-distributions. Under these conditions, we derive the general kinetic mirror instability growth rate including finite electron temperature effects. As for an example of equilibrium particle distribution, we analyze a large class of κ to suprathermal loss cone distributions in view of application to a variety of space plasmas like the solar wind, magnetosheath, ring current plasma, and the magnetospheres of other planets.

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