Resonant Alfven wave heating of the plasma sheet boundary layer

Details Resonant Alfven wave heating of the plasma sheet boundary layer Resonant Alfven wave heating of the plasma sheet boundary layer

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9515039h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 15039-15046.

Physics

28

Geomagnetic Tail, Magnetic Storms, Magnetohydrodynamic Waves, Plasma Heating, Plasmas (Physics), Atmospheric Models, Magnetic Field Configurations, Magnetopause, Poynting Theorem, Wave Equations

Scientific paper

The exchange of energy between the plasma mantle and the plasma sheet boundary layer (PSBL) is examined with a one-dimensional magnetotail model. The energy exchange occurs via Poynting flux generated by the localized mode conversion of a surface wave to an Alfven wave. This Poynting flux propagates through the lobe and into the PSBL where it is absorbed by two processes. The first arises from a gradient in the plasma beta causing a smooth absorption of Poynting flux. The second process results from the localized mode conversion of the decaying surface wave to an Alfven wave, causing a localized absorption of energy. A numerical solution of the linearized ideal MHD equations is obtained by assuming an adiabatic equation of state.

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