HR: 0800h
AN: SM31C-0572    [Abstracts]
TI: Nonlinear gyrokinetic simulation of mirror instability
AU: * QU, H
EM: hqu@uci.edu
AF: University of California, Irvine, Frederick Reines Hall, Irvine, CA 92697, United States
AU: LIN, Z
EM: zhihongl@uci.edu
AF: University of California, Irvine, Frederick Reines Hall, Irvine, CA 92697, United States
AU: CHEN, L
EM: liuchen@uci.edu
AF: University of California, Irvine, Frederick Reines Hall, Irvine, CA 92697, United States
AB: The mirror instability is a low frequency electromagnetic mode destabilized by pressure anisotropy in high- β plasamas. The finite Larmor radius (FLR) effects play an important role in determining the threshold and the growth rate of the mirror instability. A gyrokinetic PIC simulation code has been developed for the simulation of compressible magnetic turbulence driven by the mirror instability. Results of the linear simulation of mirror mode agree well with the analytic dispersion relation. Nonlinear simulations of single mode find that the mirror instability saturates via wave-particle trapping. Nonlinear simulations of multiple modes found important effects of mode coupling.
DE: 2159 Plasma waves and turbulence
DE: 2483 Wave/particle interactions (7867)
DE: 2728 Magnetosheath
DE: 2753 Numerical modeling
DE: 2772 Plasma waves and instabilities (2471)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting