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Beams of protons and alpha particles greater than approximately 30 keV/charge from the earth's bow shockTwo beamlike particle events (30 keV/charge to 160 keV/charge) upstream of the earth's bow shock have been investigated with the Max-Planck-Institut/University of Maryland ultralow energy and charge analyzer on ISEE 1. These beams consist of protons as well as of alpha particles, and the spectra are generally steep and are decreasing with increasing energy. During one event the spectra of both protons and alpha particles have a maximum at approximately 65 keV/charge. During these events, the interplanetary magnetic field through the satellite position was almost tangent to the bow shock, and application of the theory of acceleration predicts acceleration of a solar wind particle up to 60 keV/nucleon in a single reflection. The observation of reflected protons as well as alpha particles has implications for the physical reflection process usually not discussed in acceleration theories.
Document ID
19810054529
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Scholer, M.
(Max-Planck-Institut fuer Physik und Astrophysik Garching, Germany)
Ipavich, F. M.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Gloeckler, G.
(Maryland, University College Park, MD, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1981
Subject Category
Geophysics
Accession Number
81A38933
Funding Number(s)
CONTRACT_GRANT: NAS5-20062
CONTRACT_GRANT: BMFT-RV14-B8/74
Distribution Limits
Public
Copyright
Other

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