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A filament of energetic particles near the high-latitude dawn magnetopauseThe Geotail satelite detected a filament of tailward-streaming energetic particles spatially separated from the boundary layer of energetic particles at the high-latitude dawn magnetopause at a downstream distance of approximately 80 R(sub E) on October 27, 1992. During this event, the composition and charge states of energetic ions at energies above approximately 10 keV show significant intermix of ions from solar wind and ionospheric sources. Detailed analysis leads to the deduction that the filament was moving southward towards the neutral sheet at an average speed of approximately 80 km/s, implying an average duskward electric field of approximately 1 mV/m. Its north-south dimension was approximately 1 R(sub E) and it was associated with an earthward directed field-aligned current of approximately 5 mA/m. The filament was separated from the energetic particle boundary layer straddling the magnetopause by approximately 0.8 R(sub E) and was inferred to be detached from the boundary layer at downstream distance beyond approximately 70 R(sub E) in the distant tail.
Document ID
19950045568
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lui, A. T. Y.
(Johns Hopkins Univ. United States)
Williams, D. J.
(Johns Hopkins Univ. United States)
Mcentire, R. W.
(Johns Hopkins Univ. United States)
Christon, S. P.
(Univ. of Maryland United States)
Jacquey, C.
(Johns Hopkins Univ. United States)
Angelopoulos, V.
(Johns Hopkins Univ. United States)
Yamamoto, T.
(Inst. of Space and Astronautical Science Japan)
Kokubun, S.
(Nagoya Univ. Japan)
Frank, L. A.
(Univ. of Iowa United States)
Ackerson, K. L.
(Univ. of Iowa United States)
Date Acquired
August 16, 2013
Publication Date
December 15, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 25
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
95A77167
Funding Number(s)
CONTRACT_GRANT: NAS5-26858
CONTRACT_GRANT: N00039-91-C-001
Distribution Limits
Public
Copyright
Other

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