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Observation of Energetic Trapped Oxygen Ions in the Inner Magnetosphere

Adams, J. H., Jr. and Blake, J. B. and Grigorov, N. L. and Kondratyeva, M. A. and Mewaldt, R. A. and Panasyuk, M. I. and Schulz, M. and Tretyakova, Ch. A. and Tylka, A. J. (1991) Observation of Energetic Trapped Oxygen Ions in the Inner Magnetosphere. In: Proceedings of the 22nd International Cosmic Ray Conference. Vol.3. , Dublin, Ireland, pp. 625-628.

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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.

Item Type:Book Section
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Mewaldt, R. A.0000-0003-2178-9111
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.
Group:Space Radiation Laboratory
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Aerospace Sponsored Research ProgramUNSPECIFIED
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Space Radiation Laboratory1991-16
Record Number:CaltechAUTHORS:20140924-145158774
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50009
Deposited By: Deborah Miles
Deposited On:30 Sep 2014 18:50
Last Modified:22 Nov 2019 09:58

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