Does the ponderomotive force move mass in the magnetosphere?

Details Does the ponderomotive force move mass in the magnetosphere? Does the ponderomotive force move mass in the magnetosphere?

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..917a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, June 1990, p. 917-920.

Physics

14

Earth Magnetosphere, Magnetohydrodynamic Waves, Mass Transfer, Ponderomotive Forces, Space Plasmas, Conservation Equations, Magnetopause, Pressure Gradients, Two Dimensional Models

Scientific paper

A two-dimensional, nonlinear hydromagnetic computer code is applied to the problem of pure fast mode cavity resonances in a box model of the magnetosphere. The cavity modes are excited by a magnetopause compression and relaxation with a maximum boundary velocity v0. The results show that significant mass transport of relatively low-energy plasma by the wave fields may be possible for v0/A0 equal to about 0.2, where A0 is the Alfven speed at the boundary. For a likely field-aligned perturbation structure, the mass tends to accumulate at and near the equatorial plane. This mass transport is interpreted as being driven by the ponderomotive force, which is finally limited by opposing pressure gradients in a finite plasma. Heating by adiabatic compression of the plasma is also seen.

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