Trapped-particle evacuation - Source of magnetotail bursts and tailward flows?

Details Trapped-particle evacuation - Source of magnetotail bursts and tailward flows? Trapped-particle evacuation - Source of magnetotail bursts and tailward flows?

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..353l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, May 1989, p. 353-356. Research sponsored by the Aerospace Corp.

Physics

7

Geomagnetic Tail, Magnetically Trapped Particles, Polar Substorms, Space Plasmas, Electric Fields, Lines Of Force, Night Sky, Plasma Layers

Scientific paper

Observational and theoretical evidence that the polar cap can expand rapidly enough during the growth phase of a substorm to release geomagnetically trapped particles from previously closed drift shells, enabling the particles to escape into the tail, are examined. Observations show that the moving separatrix can overtake convecting nightside plasma during intervals of polar-cap expansion. Models of this phenomenon suggest that closed nightside field lines can be evaculated of their particle populations, and it is noted that such evacuations can account for the occurrence of energetic-particle bursts in the tail.

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