Shock surfing vs. shock drift acceleration

Details Shock surfing vs. shock drift acceleration Shock surfing vs. shock drift acceleration

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1367l&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 7, p. 1367-1370

Physics

Plasma Physics

11

Interplanetary Physics: Cosmic Rays, Space Plasma Physics: Numerical Simulation Studies

Scientific paper

We numerically investigate the pre-injection mechanism by which pickup ions approaching quasi-perpendicular shocks may be accelerated above the threshold velocity required to begin diffusive shock acceleration. We demonstrate that three distinct mechanisms contribute to the acceleration and that they operate on disjoint subsets of the pickup ion population. We quantitatively compare the efficiency of each mechanism as a function of shock Mach number, pickup ion mass and shock ramp width and show that shock surfing predominates below a critical ramp width.

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