Physics
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3337m&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 22, p. 3337-3340
Physics
9
Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Plasma Sheet, Magnetospheric Physics: Storms And Substorms
Scientific paper
A numerical simulation of impulsive growth and sudden disruption of a thin current sheet due to inward boundary flows in a collisionless plasma, governed by the equations of Hall magnetohydrodynamics, is presented. After a period of slow growth followed by a much shorter period of impulsive enhancement, the thin current sheet becomes unstable to secondary tearing instabilities which produce multiple islands. These secondary islands coalesce to form a large plasmoid. Much of the thin current sheet disrupts rapidly to produce magnetic turbulence in less than a characteristic Alfvén time. Possible implications for magnetotail substorms are discussed.
Bhattacharjee Anirban
Ma Zhi-Wei
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