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Anomalous Cosmic Rays: The Principal Source of High Energy Heavy Ions in the Radiation Belts

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. https://resolver.caltech.edu/CaltechAUTHORS:20140624-144420724

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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
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/GM097p0035DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/GM097p0035/summaryPublisherArticle
ORCID:
AuthorORCID
Mewaldt, R. A.0000-0003-2178-9111
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 We thank B. Klecker, R. Pyle, and J. Simpson for the use of unpublished data in Figure 2.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-30704
NASANAGW-1919
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-04
Series Name:Geophysical Monograph
Issue or Number:97
Record Number:CaltechAUTHORS:20140624-144420724
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140624-144420724
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
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46484
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:25 Jun 2014 16:29
Last Modified:22 Nov 2019 09:58

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