Physics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8919p&link_type=abstract
Journal of Geophysical Research, vol. 86, Oct. 1, 1981, p. 8919-8928.
Physics
15
Geomagnetic Tail, Magnetohydrodynamic Stability, Neutral Sheets, Plasma Layers, Anomalies, Distribution Functions, Electrical Resistivity, Ion Density (Concentration), Steady State
Scientific paper
A one-dimensional non-Maxwellian model for the steady neutral sheet at the center of the earth's plasma sheet is constructed, and its instability properties are examined with respect to the lower-hybrid-drift wave. It is shown that in the limit of a thin neutral sheet, the distribution of modified Alper and Boltzmann distributions is a more powerful source of free energy than the usual drifting Maxwellian. It is also shown that most regions within the neutral sheet are unstable, and the frequency spectrum of the unstable waves is nearly the same as in the drifting Maxwellian case. The growth rate is found to be enhanced, and the saturation level of the fluctuating field and the anomalous resistivity calculated in the entire sheet are found to be 3 to 4 times larger than those in a Maxwellian sheet.
Galland Kivelson Margaret
Pu Zu Yin
Quest Kevin B.
Tu Chia-Ying
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