New evidence for geomagnetically trapped anomalous cosmic rays

Details New evidence for geomagnetically trapped anomalous cosmic rays New evidence for geomagnetically trapped anomalous cosmic rays

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2003c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8534), vol. 20, no. 18, p. 2003-2006.

Physics

42

Cosmic Rays, Energy Spectra, Radiation Belts, Satellite-Borne Instruments, Helium, Neon, Nitrogen, Oxygen, Particle Trajectories, Polar Orbits

Scientific paper

We 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.

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