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Magnetic holes in plasmas close to the mirror instability
CNRS, Observatoire de la CÔte d'Azur, B.P. 4229, 06304 Nice Cedex 4, France
Abstract. Non-propagating magnetic hole solutions in anisotropic plasmas near the mirror instability threshold are investigated in numerical simulations of a fluid model that incorporates linear Landau damping and finite Larmor radius corrections calculated in the gyrokinetic approximation. This FLR-Landau fluid model reproduces the subcritical mirror bifurcation recently identified on the Vlasov-Maxwell system, both by theory and numerics. Stable magnetic hole solutions that display a polarization different from that of Hall-MHD solitons are indeed obtained slighlty below threshold, while magnetic patterns and spatio-temporal chaos emerge when the system is maintained in a mirror unstable regime.
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Citation: Borgogno, D., Passot, T., and Sulem, P. L.: Magnetic holes in plasmas close to the mirror instability, Nonlin. Processes Geophys., 14, 373-383, 2007. Bibtex EndNote Reference Manager
