Physics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.4793s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, June 1, 1983, p. 4793-4804.
Physics
36
Current Sheets, Magnetic Field Configurations, Particle Acceleration, Plasma Layers, Space Plasmas, Electric Fields, Magnetic Flux, Magnetohydrodynamic Stability, Plasma Potentials
Scientific paper
An investigation is conducted of the stability of a large laboratory plasma current sheet, which has been generated in the process of magnetic field line reconnection, with respect to local current increases. Magnetic flux variations in regions remote from the current sheet generate an inductive voltage in the current loop that drops off inside the plasma in the form of a potential double layer, leading to particle acceleration with velocities much larger than those expected from the steady state electric fields in the plasma. A model for the mechanism of the current disruptions is formulated in which the potential structure leads to ion expulsion, creating a localized density drop. The associated current drop in an inductive circuit drives the potential structure, providing feedback for the disruptive instability. Similarities to, and differences from, magnetospheric substorm phenomena are noted.
Gekelman Walter
Stenzel R. L.
Wild Neville
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