Physics – Plasma Physics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2925p&link_type=abstract
Geophysical Research Letters, Volume 24, Issue 22, p. 2925-2928
Physics
Plasma Physics
23
Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Storms And Substorms, Space Plasma Physics: Magnetic Reconnection
Scientific paper
Three-dimensional (3-D) particle simulations are used to investigate the response of the near-Earth plasma sheet to the imposition of an external convection electric field for the case where magnetic flux is blocked from leaving the region. Under these conditions an interchange mode with characteristic wavelength of 1-2RE (determined by the ion gyroradius) in the east-west direction is excited before the plasma sheet is severed by the formation of a neutral line. The nonlinear growth of the interchange mode produces a strong (10-20 mV/m), localized (<~0.5RE) Ey field which drives earthward flows of both electrons and ions. These flows pinch off regions of southward Bz which eventually are expelled tailward in narrow fingers around the edges of the earthward flow bursts.
Coroniti Ferdinan V.
Pritchett Philip L.
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