Ion Acceleration in Non-Stationary Shocks

Details Ion Acceleration in Non-Stationary Shocks Ion Acceleration in Non-Stationary Shocks

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1183...39l&link_type=abstract

SHOCK WAVES IN SPACE AND ASTROPHYSICAL ENVIRONMENTS: 18th Annual International Astrophysics Conference. AIP Conference Proceedin

Astronomy and Astrophysics

Astrophysics

Shock Waves, Astrophysical Plasma, Interplanetary Magnetic Fields, Energy States, Planetary Bow Shocks, Interplanetary Shocks, Magnetohydrodynamics And Plasmas, Interplanetary Magnetic Fields, Energetic Particles

Scientific paper

Previous particle-in-cell simulations have evidenced that quasi-perpendicular shocks are non-stationary and suffer a self-reformation on gyro scale of the incoming ions. In this paper, by separating the incoming ions into reflected and directly transmitted parts, we investigate ion acceleration in a non-stationary perpendicular shock. The results show that shock drift acceleration (SDA) is a dominant acceleration mechanism, while shock surfing acceleration (SSA) mechanism becomes more and more important with the increase of the initial particle energy (both their average final energy and percentage increase). The percentage of reflected ions cyclically varies in time with a period equal to the self reformation cycle.

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