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An analysis of the shocklike electrostatic noise observed during AMPTE solar wind ion releasesElectrostatic waves produced by the interaction of the ion cloud with the solar wind are analyzed in order to explain the shocklike noise detected by the Ion Release Module instruments during the Active Magnetospheric Particle Tracer Explorers solar wind ion releases. The results indicate that the shocklike noise can be generated by two instabilities, an ion-electron instability that occurs for waves propagating parallel to the solar wind velocity and an ion-ion instability that occurs for waves propagating at a large angle to the solar wind direction. Both instabilities give high growth rates for both the lithium and barium releases. The calculated results agree with the observed ones in all main features. In the earlier stage of the ion cloud expansion, both instabilities are likely to occur, while in the later stage the ion-ion instability is more likely to occur.
Document ID
19870049556
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ma, T. Z.
(Iowa Univ. Iowa City, IA, United States)
Gurnett, D. A.
(Iowa, University Iowa City, United States)
Omidi, N.
(California, University Los Angeles, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: Journal of Geophysical Research
Volume: 92
ISSN: 0148-0227
Subject Category
Solar Physics
Report/Patent Number
AD-A184312
Accession Number
87A36830
Funding Number(s)
CONTRACT_GRANT: N00014-85-K-0404
CONTRACT_GRANT: N00014-82-K-0183
CONTRACT_GRANT: NGL-16-001-043
CONTRACT_GRANT: NGL-16-001-002
Distribution Limits
Public
Copyright
Other

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