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Energization of Ions in near-Earth current sheet disruptionsIn this study we examine observations made by AMPTE/CCE of energetic ion bursts during seven substorm periods when the satellite was located near the neutral sheet, and CCE observed the disruption cross-tail current in situ. We compare ion observations to analytic calculations of particle acceleration. We find that the acceleration region size, which we assume to be essentially the current disruption region, to be on the order of 1 R(sub E). Events exhibiting weak acceleration had either relatively small acceleration regions (apparently associated with pseudobreakup activity on the ground) or relatively small changes in the local magnetic field (suggesting that the magnitude of the local current disruption region was limited). These results add additional support for the view that the particle bursts observed during turbulent current sheet disruptions are due to inductive acceleration of ions.
Document ID
19980017789
Acquisition Source
Headquarters
Document Type
Contractor Report (CR)
External Source(s)
doi:10.1029/94GL03384
Authors
Taktakishvili, A. (Abastumani Astrophysical Observatory Georgia, USSR)
Lopez, R. E. (Maryland Univ. College Park, MD United States)
Goodrich, C. C. (Maryland Univ. College Park, MD United States)
Date Acquired
September 6, 2013
Publication Date
March 1, 1995
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 22
Issue: 5
ISSN: 0094-8534
Subject Category
Geophysics
Report/Patent Number
NAS 1.26:207163
Paper-94GL03384
NASA/CR-95-207163
Funding Number(s)
CONTRACT_GRANT: NAS5-31208
CONTRACT_GRANT: NAGw-3222
Distribution Limits
Public
Copyright
Public Use Permitted.

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