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Loss of ring current O(+) ions due to interaction with Pc 5 wavesA test particle code is used here to investigate ring current ion interaction with Pc 5 waves, combined with convection and corotation electric fields, with emphasis on the loss of O(+) ions over the dayside magnetosphere. A new loss mechanism for the O(+) ions due to the combined effects of convection and corotation electric fields and interactions with Pc 5 waves via a magnetic drift-bound resonance is presented. For given fields, whether a particle gains or losses energy depends on its initial kinetic energy, pitch angle at the equatorial plane, and the position of its guiding center with respect to the azimuthal phase of the wave. The ring current O(+) ions show a dispersion in energies and L values with decreasing local time across the dayside, and a bulk shift to lower energies and higher L values. Due to interaction with the Pc 5 waves, the particle's kinetic energy can drop below that required to overcome the convection potential and the particle is lost to the dayside magnetopause by a sunward E x B drift.
Document ID
19930039187
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Li, Xinlin
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hudson, Mary
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chan, Anthony
(Dartmouth College Hanover, NH, United States)
Roth, Ilan
(California Univ. Berkeley, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: A1
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A23184
Funding Number(s)
CONTRACT_GRANT: NAG5-1098
CONTRACT_GRANT: NSF ATM-89-18774
CONTRACT_GRANT: NAGW-1652
CONTRACT_GRANT: F19628-87-K-0038
Distribution Limits
Public
Copyright
Other

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