Mewaldt, R. A. and Selesnick, R. S. and Cummings, J. R.
(1996)
Anomalous Cosmic Rays: The Principal Source of High Energy Heavy Ions in the Radiation Belts.
In:
Radiation Belts: Models and Standards.
Geophysical Monograph.
No.97.
American Geophysical Union
, Washington, DC, pp. 35-41.
ISBN 9780875900797.
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Abstract
Recent observations from SAMPEX have shown that "anomalous cosmic rays" are
the principal source of high energy (> 10MeV/nuc) heavy ions trapped in the
radiation belts. This component of interplanetary particles is known to originate
from interstellar atoms that has been accelerated to high energies in the outer
heliosphere. The mechanism by which anomalous cosmic rays with ~1 to ~50 Me V/nuc are trapped in a radiation belt at L ≈ 2 has now been verified. We
discuss models for accelerating and trapping anomalous cosmic rays and review
observations of their composition, energy spectra, pitch angle distribution, and time
variations. Extrapolation of the fluxes observed at ~600 km to higher altitude and
other time periods is also discussed.
| Item Type: | Book Section |
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| Additional Information: | © 1996 American Geophysical Union.
This work was supported by NASA under
contract NAS5-30704 and grant NAGW-1919. We appreciate
contributions to this work by our SAMPEX colleagues B. Blake, A.
Cummings, B. Klecker, R. Leske, G. Mason, J. Mazur, E. Stone, and
T. von Rosenvinge. We thank B. Klecker, R. Pyle, and J. Simpson
for the use of unpublished data in Figure 2. |
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| Group: | Space Radiation Laboratory |
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| Funders: | | Funding Agency | Grant Number |
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| NASA | NAS5-30704 | | NASA | NAGW-1919 |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| Space Radiation Laboratory | 1996-04 |
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| Series Name: | Geophysical Monograph |
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| Issue or Number: | 97 |
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| Record Number: | CaltechAUTHORS:20140624-144420724 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140624-144420724 |
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| Official Citation: | Mewaldt, R. A., Selesnick, R. S. and Cummings, J. R. (2013) Anomalous Cosmic Rays: The Principal Source of High Energy Heavy Ions in the Radiation Belts, in Radiation Belts: Models and Standards (eds J.F. Lemaire, D. Heynderickx and D.N. Baker), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM097p0035 |
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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: | 46484 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Deborah Miles
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| Deposited On: | 25 Jun 2014 16:29 |
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| Last Modified: | 22 Nov 2019 09:58 |
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