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Published 1991 | Version Published
Book Section - Chapter Open

Observation of Energetic Trapped Oxygen Ions in the Inner Magnetosphere

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Abstract

We report on a series of measurements of 5-30 Me V /nuc oxygen ions made with trackdetector stacks on Cosmos satellites. We find that the angular distributions during solar energetic particle events are isotropic, while solar-quiet times show highly anisotropic distributions suggestive of a trapped particle component. Detailed Monte Carlo simulations confirm this interpretation and allow us to separate the trapped and cosmic ray contributions to the quiet-time fluxes. Our data appear fully consistent with trapping of anomalous cosmic ray ions as the source of the trapped particles but inconsistent with radial diffusion from the outer radiation zone.

Additional Information

Copyright Dublin Institute for Advanced Studies. Provided by the NASA Astrophysics Data System. We thank NASA and IKI for sponsoring this study. This work is supported in part by NASA contract W-17,358, NASA grant NAG5-727, and the Aerospace Research Program.

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50009
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CaltechAUTHORS:20140924-145158774

Related works

Describes
http://adsabs.harvard.edu/abs/1991ICRC....3..625A (URL)
http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1991ICRC....3..625A&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf (URL)

Funding

NASA
W-17,358
NASA
NAGS-727
Aerospace Sponsored Research Program

Dates

Created
2014-09-30
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Updated
2019-11-22
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Space Radiation Laboratory
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Space Radiation Laboratory
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1991-16