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Streaming sausage, kink and tearing instabilities in a current sheet with applications to the earth's magnetotailThis paper investigates the growth rates and eigenmode structures of the streaming sausage, kink, and tearing instabilities in a current sheet with a super-Alfvenic flow. The growth rates and eigenmode structures are first considered in the ideal incompressible limit by using a four-layer model, as well as a more realistic case in which all plasma parameters and the magnetic field vary continuously along the direction perpendicular to the magnetic field and plasma flow. An initial-value method is applied to obtain the growth rate and eigenmode profiles of the fastest growing mode, which is either the sausage mode or kink mode. It is shown that, in the earth's magnetotail, where super-Alfvenic plasma flows are observed in the plasma sheet and the ratio between the plasma and magnetic pressures far away from the current layer is about 0.1-0.3 in the lobes, the streaming sausage and streaming tearing instabilities, but not kink modes, are likely to occur.
Document ID
19880059413
Document Type
Reprint (Version printed in journal)
Authors
Lee, L. C. (Alaska Univ. Fairbanks, AK, United States)
Wang, S. (Alaska Univ. Fairbanks, AK, United States)
Wei, C. Q. (Alaska, University Fairbanks, United States)
Tsurutani, B. T. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF ATM-85-21115
CONTRACT_GRANT: DE-FG06-86ER-13530
Distribution Limits
Public
Copyright
Other