Electron Distributions Upstream and Downstream of High Mach Number, Collisionless Shocks

Details Electron Distributions Upstream and Downstream of High Mach Number, Collisionless Shocks Electron Distributions Upstream and Downstream of High Mach Number, Collisionless Shocks

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh31a0392y&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH31A-0392

Physics

2154 Planetary Bow Shocks, 7807 Charged Particle Motion And Acceleration, 7845 Particle Acceleration, 7846 Plasma Energization, 7851 Shock Waves (4455)

Scientific paper

Electron dynamics is important to collisionless shock physics because it redistributes energy, provides information on shock fine structure, and leads to shock-heated and accelerated electrons responsible for various plasma waves and emissions. In this paper, the electron distribution function upstream and downstream of high Mach number, collisionless shocks is studied by numerical simulation for various shock profiles. Time-steady shock profiles are specified analytically while non-steady shock profiles are self- consistently generated by a new two-dimensional hybrid code. The effects of shock structure such as nonstationarity, overshoots, magnetic fields, cross-shock potentials, two-dimensional spatial and temporal ripples, and the angle between upstream magnetic field and shock normal, on the electron distribution function upstream and downstream of the shocks are studied in detail. The results show that the complex shock structure modifies the electron motion significantly, distorts the electron distribution, thereby changing the plasma waves driven upstream and downstream of the shock.

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