Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm53b1377l&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM53B-1377
Physics
Plasma Physics
[7829] Space Plasma Physics / Kinetic Waves And Instabilities
Scientific paper
Mirror instability is a low-frequency compressible electromagnetic mode driven by the pressure anisotropy, and this can only occur in the high-beta plasmas. It has been widely studied due to its possible connection to the understanding of low-frequency compressible magnetic turbulence in magnetized plasma. A gyrokinetic particle simulation was formulated to study this instability, and it shows that at a relatively weak drive, phase-space trapping of the particles plays a dominant role in the evolution of the instability's nonlinear saturation [Nonlinear Saturation of Mirror Instability, H. Qu, Z. Lin, and L. Chen, Geophy. Res. Lett. 35, L10108 (2008)]. Here, we extend this gyrokinetic particle simulation model of the mirror mode to include the Coulomb collisional effects by implementing the Lorentz pitch-angle scattering operator. We will study the role of the collision in the nonlinear saturation and evolution of the mirror instability.
Lin Zhangda
Luk Onnie
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