On the non-linear mirror instability

Details On the non-linear mirror instability On the non-linear mirror instability

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15..341p&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 8-9, p. 341-344

Physics

7

Magnetic Mirrors, Magnetosheath, Nonlinearity, Proton Magnetic Resonance, Stability, Trapped Particles, Energy Transfer, Proton Density (Concentration), Velocity Distribution, Wave-Particle Interactions

Scientific paper

It is argued that quasi-linear theory alone does not provide an adequate description of the non linear evolution of the mirror instability. Based on a simplified model for the motion of particles in a mirror wave, it is found that the main mechanism which ends the linear phase of the instability has to be particle trapping. Quasi-linear effects may still play a role for particles with small velocities perpendicular to the background magnetic field and do probably dominate the late stage of the instability when the wave-particle energy exchange associated with particle trapping becomes inefficient.

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