Evidence for trapped anomalous cosmic ray oxygen ions in the inner magnetosphere

Details Evidence for trapped anomalous cosmic ray oxygen ions in the inner magnetosphere Evidence for trapped anomalous cosmic ray oxygen ions in the inner magnetosphere

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1959g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Nov. 1991, p. 1959-1962. Research supported by Aerospace Corp.

Other

32

Cosmic Rays, Earth Magnetosphere, Oxygen Ions, Solar Corpuscular Radiation, Trapped Particles, Angular Distribution, Cosmos Satellites, Monte Carlo Method, Particle Flux Density, Satellite Observation

Scientific paper

A series of measurements of 5-30 MeV/nucleon oxygen ions made with track detector stacks on Cosmos satellites show isotropic angular distributions during solar energetic particle events. Solar-quiet times, on the other hand, have highly anisotropic distributions suggestive of a trapped-particle component. Detailed Monte Carlo simulations confirm this interpretation and allow us to measure the trapped and cosmic-ray contributions to the observed fluxes. The data are fully consistent with anomalous cosmic-ray ions, rather than radial diffusion from the outer zone, as the source of the trapped particles.

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