SDA and SSA ion acceleration through a nonstationary perpendicular supercritical collisionless shock

Details SDA and SSA ion acceleration through a nonstationary perpendicular supercritical collisionless shock SDA and SSA ion acceleration through a nonstationary perpendicular supercritical collisionless shock

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh31a1463y&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH31A-1463

Physics

Plasma Physics

[7807] Space Plasma Physics / Charged Particle Motion And Acceleration, [7845] Space Plasma Physics / Particle Acceleration, [7851] Space Plasma Physics / Shock Waves

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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