Grigorov, N. L. and Kondratyeva, M. A. and Panasyuk, M. I. and Tretyakova, Ch. A. and Adams, J. H., Jr. and Blake, J. B. and Schulz, M. and Mewaldt, R. A. and Tykla, A. J.
(1991)
Evidence for Trapped Anomalous Cosmic Ray Oxygen Ions in the Inner Magnetosphere.
Geophysical Research Letters, 18
(11).
pp. 1959-1962.
ISSN 0094-8276.
doi:10.1029/91GL02551.
https://resolver.caltech.edu/CaltechAUTHORS:20140512-094110878
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Abstract
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. Our data are fully consistent with anomalous cosmic-ray ions, rather than radial diffusion from the outer zone, as the source of the trapped particles.
| Item Type: | Article |
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| Additional Information: | Copyright 1991 by the American Geophysical Union.
(Received: August 14, 1991; accepted September 9, 1991.)
We gratefully acknowledge the
efforts of NASA and IKI in the US/USSR Joint Working
Group on Solar-Terrestrial Physics, which sponsored this
study. We especially thank Vernon Jones for his
encouragement and support. We thank D.I. Kozlov, general
contractor for Cosmos, for the many flights that provided the
Cosmos data. We also thank the Space Analysis and Data
Branch (J3SOS) of the US Space Command for providing
the Cosmos orbital data. This work is supported in part by
NASA contract W-17,358, by NASA grant NAG5-727, and
by the Aerospace Sponsored Research (ASR) Program of the
Aerospace Corporation. |
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| Group: | Space Radiation Laboratory |
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| Funders: | | Funding Agency | Grant Number |
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| NASA | W-17358 | | NASA | NAG5-727 | | Aerospace Corporation | UNSPECIFIED |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Space Radiation Laboratory | 1991-10 |
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| Issue or Number: | 11 |
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| DOI: | 10.1029/91GL02551 |
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| Record Number: | CaltechAUTHORS:20140512-094110878 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140512-094110878 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 45669 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Deborah Miles
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| Deposited On: | 12 May 2014 20:34 |
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| Last Modified: | 10 Nov 2021 17:15 |
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