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New evidence for geomagnetically trapped anomalous cosmic raysWe report new observations of 15 MeV/nuc or greater trapped heavy ions with Z equal to or greater than 2, made on the polar-orbiting SAMPEX spacecraft in late 1992 and early 1993. A trapped population that includes He, N, O, and Ne is found to be located at L = 2. We conclude that the observed N, O, and Ne ions are 'anomalous' cosmic rays, trapped by the mechanism proposed by Blake and Friesen (1977). While it is not expected that this mechanism would also trap anomalous He, the characteristics of the trapped He population are generally consistent with those of N, O, and Ne.
Document ID
19940033824
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cummings, J. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cummings, A. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mewaldt, R. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Selesnick, R. S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Stone, E. C.
(California Inst. of Technology Pasadena, United States)
Von Rosenvinge, T. T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
September 15, 1993
Publication Information
Publication: Geophysical Research Letters
Volume: 20
Issue: 18
ISSN: 0094-8534
Subject Category
Space Radiation
Accession Number
94A10479
Funding Number(s)
CONTRACT_GRANT: NAS5-30704
CONTRACT_GRANT: NAGW-1919
Distribution Limits
Public
Copyright
Other

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