Physics – Plasma Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jplph..33..425l&link_type=abstract
Journal of Plasma Physics (ISSN 0022-3778), vol. 33, June 1985, p. 425-436. Research supported by the Ministere de l'Education N
Physics
Plasma Physics
30
Magnetopause, Nonuniform Magnetic Fields, Plasma Dynamics, Space Plasmas, Beta Factor, Diamagnetism, Magnetic Field Configurations, Magnetospheric Instability, Solar Wind
Scientific paper
The motion of a plasmoid (plasma-field entity) across an inhomogeneous magnetic field distribution of which the direction and strength change along the penetration trajectory is studied theoretically. The critical magnetic field density where a plasmoid is stopped or deflected is shown to be the same critical field as that which has been observed in laboratory experiments for a nonrotating B-field distribution. The proposed kinetic model is applied to the impulsive penetration of solar-wind plasma irregularities impinging on the geomagnetic field with an excess momentum density. This penetration leads to the formation of a plasma boundary layer where the intruding plasmoids are deflected eastward; magnetospheric plasma is dragged in the direction parallel to the flanks of the average magnetopause surface.
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