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SAMPEX Observations of Geomagnetically Trapped Anomalous Cosmic Rays

Cummings, J. R. and Cummings, A. C. and Mewaldt, R. A. and Selesnick, R. S. and Stone, E. C. and von Rosenvinge, T. T. (1993) SAMPEX Observations of Geomagnetically Trapped Anomalous Cosmic Rays. In: Proceedings of the 23rd International Cosmic Ray Conference. Vol.2. World Scientific , Singapore, pp. 475-478.

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We summarize observations of trapped anomalous cosmic rays made with the Mass Spectrometer Telescope (MASn on the polar-orbiting SAMPEX spacecraft during late 1992 and early 1993. MAST observes a trapped population of heavy ions with ~15 MeV/nuc that includes N, 0, and Ne, but very little C, located in a narrow belt at L=2. The characteristics of this radiation belt are generally consistent with those expected from the mechanism proposed by Blake and Friesen for trapping anomalous cosmic rays in the magnetosphere and with COSMOS observations made during the last solar minimum. We discuss the location, composition, and temporal history of the trapped heavy ions observed with SAMPEX and compare them with properties of anomalous cosmic rays observed in the interplanetary medium. Although trapped He ions are also observed by MAST, it appears likely that they have a different origin.

Item Type:Book Section
Cummings, A. C.0000-0002-3840-7696
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Additional Information:Copyright University of Calgary. Provided by the NASA Astrophysics Data System. Brownlee Gauld and Daniel Williams gave valuable assistance in data analysis. We appreciate conversations with J. H. Adams, Jr., J.B. Blake, and A. J. Tylka.
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1993-35
Record Number:CaltechAUTHORS:20141022-095413422
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50673
Deposited By: Deborah Miles
Deposited On:24 Oct 2014 16:17
Last Modified:20 Feb 2020 14:33

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