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Toward a comprehensive theory for the sweeping of trapped radiation by inert orbiting matterThere is a need to calculate loss rates when trapped Van Allen radiation encounters inert orbiting material such as planetary rings and satellites. An analytic expression for the probability of a hit in a bounce encounter is available for all cases where the absorber is spherical and the particles are gyrotropically distributed on a cylindrical flux tube. The hit probability is a function of the particle's pitch angle, the size of the absorber, and the distance between the flux tube and the absorber when distances are scaled to the gyroradius of a particle moving perpendicular to the magnetic field. Using this expression, hit probabilities in drift encounters were computed for all regimes of particle energies and absorber sizes.
Document ID
19890036833
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fillius, Walker
(California, University La Jolla, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Astrophysics
Accession Number
89A24204
Funding Number(s)
CONTRACT_GRANT: NGL-05-005-007
CONTRACT_GRANT: NAGW-652
CONTRACT_GRANT: NAGW-336
CONTRACT_GRANT: NAS2-153
Distribution Limits
Public
Copyright
Other

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