Physics – Plasma Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8483a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8483-8493.
Physics
Plasma Physics
25
Earth Magnetosphere, Magnetohydrodynamic Waves, Mass Transfer, Plasma Physics, Ponderomotive Forces, Beta Factor, Mathematical Models, Plasma Density, Plasmasphere
Scientific paper
A study was carried out to assess a recent suggestion that the nonlinear ponderomotive force (PMF) generated by the cavity model waves in the magnetosphere may cause significant mass transport along the ambient magnetic field. A 2D nonlinear hydromagnetic computer code was applied to box magnetospheres with two different radial variations of beta (where beta is the ratio of plasma pressure to magnetic pressure). Estimates of possible density enhancements are made for both the multiple cavity mode harmonics and the independent Alfven resonances at different L values. It was found that, while the maximum density enhancements in the inner plasmasphere and in the plasma sheet are relatively small, large density enhancements are obtained in the outer plasmasphere and plasma trough.
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