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Eddy intrustion of hot plasma into the polar cap and formation of polar-cap arcsUnder the simple postulate that multiple large scale detachable magnetospheric convection eddies can exist in the vicinity of the convection reversal boundary and in the polar cap, by Kelvin-Helmholtz instability or otherwise, it is shown that a number of seemingly disconnected plasma and electric field observations in the polar cap can be organized into a theory of magnetosheath and plasmasheet plasma intrusion into the polar cap. Current theory of inverted V structures then predicts existence of similar, but weaker, structures at the eddy convection reversal boundaries in the polar cap. A possible consequence is that the polar cap auroras are natural offshoots from discrete oval arcs and evidently are formed by similar processes. The two arc systems can occassionally produce an optical image in the form of the theta aurora.
Document ID
19830018062
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Chiu, Y. T. (Aerospace Corp. El Segundo, CA, United States)
Gorney, D. J. (Aerospace Corp. El Segundo, CA, United States)
Date Acquired
September 4, 2013
Publication Date
May 30, 1983
Subject Category
Geophysics
Report/Patent Number
ATR-83(7951)-1
NASA-CR-170377
NAS 1.26:170377
Accession Number
83N26333
Funding Number(s)
CONTRACT_GRANT: NASW-3434
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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