Modeling of ion acceleration through drift and diffusion at interplanetary shocks

Details Modeling of ion acceleration through drift and diffusion at interplanetary shocks Modeling of ion acceleration through drift and diffusion at interplanetary shocks

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9113349d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Dec. 1, 1986, p. 13349-13356. Research supported by the Johns Hopkins

Physics

23

Interplanetary Medium, Ion Motion, Particle Acceleration, Shock Waves, Energy Spectra, Particle Trajectories, Power Spectra, Simulation

Scientific paper

The authors describe a test particle simulation designed to study energetic charged particle acceleration at oblique fast-mode shocks when magnetic fluctuations exist upstream and downstream of the shock. The technique consists of integrating along exact particle orbits in a system where the angle θ1 between the shock normal and mean upstream magnetic field, the level of magnetic fluctuations, and the energy of injected particles can assume a range of values. This allows the authors to study time-dependent shock acceleration under conditions not amenable to analytical techniques. To illustrate the capability of the numerical model, the authors consider proton acceleration under conditions appropriate for interplanetary shocks near 1 AU, including large-amplitude transverse magnetic fluctuations derived from power spectra of both ambient and shock-associated MHD waves.

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