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Some features of auroral electric fields as seen in 2D numerical simulationsResults of 2D plasma simulations are presented and related to auroral observations. The formation of V-shaped potentials is studied with a 2 1/2 dimensional electrostatic particle-in-cell code for a magnetized plasma. It is shown that amplitudes for perpendicular electric fields are larger than for parallel electric fields, and for Te less than 100 eV, the amplitudes are comparable to the electric fields associated with the electrostatic shocks observed from the S3-3 satellite. The excitation of electrostatic ion-cyclotron EIC waves which occurs in the region below the parallel potential drop is discussed. In auroral plasmas EIC waves are observed above the V-shaped double layers in association with ion beams and field-aligned currents. The results also show that oppositely directed electric fields in the center and at the edges of the simulation region produce oppositely directed currents. Precipitating auroral ions in association with electron inverted-V events are seen by the DMSP-F6 satellite.
Document ID
19850039212
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Thiemann, H.
(Physikalisch-Technische Studien GmbH Freiburg im Breisgau, Germany)
Singh, N.
(Physikalisch-Technische Studien G.m.b.H. Freiburg, Germany)
Schunk, R. W.
(Utah State University of Agriculture and Applied Science, Logan, UT, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Advances in Space Research
Volume: 4
Issue: 2-3
ISSN: 0273-1177
Subject Category
Geophysics
Accession Number
85A21363
Funding Number(s)
CONTRACT_GRANT: NSF ATM-82-17138
CONTRACT_GRANT: NAGW-77
Distribution Limits
Public
Copyright
Other

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