Mirror modes: Nonmaxwellian distributions
M. Gedalin, Yu. E. Lyubarsky, M. Balikhin, R. J. Strangeway, C. T. Russell
Abstract
We perform direct analysis of mirror mode instabilities from the general dielectric tensor for several model distributions, in the longwavelength limit. The growth rate at the instability threshold depends on the derivative of the distribution for zero parallel energy. The maximum growth rate is always k vT and the instability is of nonresonant kind. The instability growth rate and its dependence on the propagation angle depend on the shape of the ion and electron distribution functions.
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