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Energetic particle diffusion coefficients upstream of quasi-parallel interplanetary shocksThe properties of about 30 to 130-keV/e protons and alpha particles upstream of six quasi-parallel interplanetary shocks that passed by the ISEE 3 spacecraft during 1978-1979 were analyzed, and the values for the upstream energegic particle diffusion coefficient, kappa, in these six events were deduced for a number of energies and upstream positions. These observations were compared with predictions of Lee's (1983) theory of shock acceleration. It was found that the observations verified the prediction of the A/Q dependence (where A and Q are the particle atomic mass and ionization state, respectively) of kappa for alpha and proton particles upstream of the quasi-parallel shocks.
Document ID
19890056285
Document Type
Reprint (Version printed in journal)
Authors
Tan, L. C. (Maryland Univ. College Park, MD, United States)
Mason, G. M. (Maryland Univ. College Park, MD, United States)
Gloeckler, G. (Maryland Univ. College Park, MD, United States)
Ipavich, F. M. (Maryland, University College Park, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF ATM-87-20608
CONTRACT_GRANT: NGR-21-002-224
CONTRACT_GRANT: NGR-21-002-316
CONTRACT_GRANT: NAG5-728
Distribution Limits
Public
Copyright
Other