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Energy and charge distribution of energetic helium ions in the outer radiation belt of the earthThe first direct measurement of the charge states of helium at energies greater than 0.5 MeV/nucleon in the outer radiation belt, obtained aboard the ISEE-1 spacecraft in 1977, is reported. High abundances of singly ionized helium, with He(+)/He(2+) = 0.4 + or - 0.1 at L = 3.3 was found during one perigee pass, with a sudden decrease of that ratio by a factor of about 10 between L = 3.3 and 3.7. It is shown that nonstationary and/or nonadiabatic processes may play an important role for the distribution of helium ions in the outer radiation belt.
Document ID
19830058736
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Klecker, B.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Hovestadt, D.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Scholer, M.
(Max-Planck-Institut fuer Physik und Astrophysik Garching, Germany)
Gloeckler, G.
(Max-Planck-Inst. fuer Physik und Astrophysik Garching, Germany)
Ipavich, F. M.
(Maryland, University College Park, MD, United States)
Fan, C. Y.
(Arizona, University Tucson, AZ, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Publication Information
Publication: Journal of Geophysics - Zeitschrift fuer Geophysik
Volume: 52
Issue: 3 19
ISSN: 0340-062X
Subject Category
Space Radiation
Accession Number
83A39954
Funding Number(s)
CONTRACT_GRANT: BMFT-RC14-B8/74
CONTRACT_GRANT: NAS5-20062
Distribution Limits
Public
Copyright
Other

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