Current interruption by density depression

Details Current interruption by density depression Current interruption by density depression

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stin...8535846w&link_type=abstract

Unknown

Computer Science

Collisionless Plasmas, Current Density, Electric Current, Interruption, Ion Acoustic Waves, Plasma Density, Current Distribution, Inductance, Magnetohydrodynamic Stability, Simulation, Solitary Waves

Scientific paper

Using a one dimensional electrostatic particle code, processes associated with current interruption in a collisionless plasma when a density depression is present along the current channel is examined. Current interruption due to double layers was suggested by Alfven and Carlqvist (1967) as a cause of solar flares. At a local density depression, plasma instabilities caused by an electron current flow are accentuated, leading to current disruption. The simulation study encompasses a wide range of the parameters in such a way that under appropriate conditions, both the Alfven and Carlqvist (1967) regime and the Smith and Priest (1972) regime take place. In the latter regime the density depression decays into a stationary structure (ion acoustic layer) which spaws a series of ion acoustic solutions and ion phase space holes travelling upstream. A large inductance of the current circuit tends to enhance the plasma instabilities.

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