Numerical studies of multiple-encounter shock drift acceleration

Details Numerical studies of multiple-encounter shock drift acceleration Numerical studies of multiple-encounter shock drift acceleration

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341..497c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 341, June 1, 1989, p. 497-505.

Computer Science

Numerical Analysis

4

Encounters, Energetic Particles, Magnetohydrodynamic Turbulence, Particle Acceleration, Shock Waves, Energy Spectra, Numerical Analysis, Particle Trajectories, Relativistic Particles, Velocity Distribution

Scientific paper

Test particle simulation is performed to examine the mechanism previously proposed by Chiueh for particle acceleration by a nearly perpendicular shock where only downstream MHD turbulence is present. A nonnegligible fraction of low-energy particles is observed gaining energy by more than three orders of magnitude in a few hundred cyclotron periods. Criteria for effective acceleration given previously are examined and confirmed. The numerical results suggest that in the nonrelativistic energy range, a power-law particle energy spectrum, with the power index determined by the degree to which the criteria are satisfied, may form.

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