Simulation of electrostatic ion instabilities in the presence of parallel currents and transverse electric fields

Details Simulation of electrostatic ion instabilities in the presence of parallel currents and transverse electric fields Simulation of electrostatic ion instabilities in the presence of parallel currents and transverse electric fields

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989plap.work..385n&link_type=abstract

In ESA, Proceedings of an International School and Workshop on Plasma Astrophysics, Volume 1 p 385-389 (SEE N89-24910 18-75)

Astronomy and Astrophysics

Astrophysics

Electrostatics, Magnetohydrodynamic Stability, Plasma Drift, Field Aligned Currents, Plasma Currents, Plasma Equilibrium, Plasma Waves

Scientific paper

A spatially two-dimensional electrostatic PIC simulation code was used to study the stability of a plasma equilibrium characterized by a localized transverse dc electric field and a field-aligned drift for L is much less than Lx, where Lx is the simulation length in the x direction and L is the scale length associated with the dc electric field. It is found that the dc electric field and the field-aligned current can together play a synergistic role to enable the excitation of electrostatic waves even when the threshold values of the field aligned drift and the E x B drift are individually subcritical. The simulation results show that the growing ion waves are associated with small vortices in the linear stage, which evolve to the nonlinear stage dominated by larger vortices with lower frequencies.

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