Physics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36.1477t&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 36, Dec. 1988, p. 1477-1484.
Physics
9
Geomagnetism, Incident Radiation, Magnetically Trapped Particles, Magnetopause, Space Plasmas, Angles (Geometry), Distance, Earth Magnetosphere, Particle Motion, Plasma-Particle Interactions
Scientific paper
Particle trapping by tangential gradients at the magnetopause is investigated for the case of a tangential discontinuity and taking into account an external magnetosheath magnetic field. Such a field causes a deflection of the reflected particle back to the magnetopause and thus enhances the chances of the particle to be captured by the magnetosphere after having traveled a certain finite distance down the magnetopause. The trapping angle and distances are calculated. Assuming a drifting Maxwellian for the magnetosheath plasma, it is estimated that about 5 pct of that part of the magnetosheath plasma which comes into contact with the magnetopause can enter the dayside magnetopause during the first encounter. After multiple gyrations, about 30 pct of these particles may be trapped in the magnetosphere.
Baumjohann Wolfgang
Treumann Rudolf A.
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