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Modeling of ion acceleration through drift and diffusion at interplanetary shocksA test particle simulation designed to model ion acceleration through drift and diffusion at interplanetary shocks is described. The technique consists of integrating along exact particle orbits in a system where the angle 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. The technique makes it possible to study time-dependent shock acceleration under conditions not amenable to analytical techniques. To illustrate the capability of the numerical model, proton acceleration was considered under conditions appropriate for interplanetary shocks at 1 AU, including large-amplitude transverse magnetic fluctuations derived from power spectra of both ambient and shock-associated MHD waves.
Document ID
19870039705
Document Type
Reprint (Version printed in journal)
Authors
Decker, R. B. (Johns Hopkins Univ. Laurel, MD, United States)
Vlahos, L. (Johns Hopkins University Laurel, MD, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
SPACE RADIATION
Funding Number(s)
CONTRACT_GRANT: NSF ATM-83-05537
CONTRACT_GRANT: N00024-83-C-5301
CONTRACT_GRANT: NSG-7055
Distribution Limits
Public
Copyright
Other