An electrostatic flow shear instability

Details An electrostatic flow shear instability An electrostatic flow shear instability

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.2978g&link_type=abstract

Journal of Geophysical Research, vol. 85, June 1, 1980, p. 2978-2980.

Physics

7

Electrostatics, Magnetic Fields, Magnetospheric Instability, Shear Flow, Solar Wind, Flow Velocity, Gyrofrequency, Magnetohydrodynamic Stability, Magnetopause, Plasma Diffusion, Plasma Interactions, Viscous Flow, Vlasov Equations

Scientific paper

This paper considers a plasma microinstability driven by a macroscopic shear in the flow velocity parallel to a uniform magnetic field. The linear electrostatic dispersion relation for a Vlasov plasma is used. The flow shear instability which results has zero frequency. The wave number at maximum growth rate is of the order of the reciprocal ion gyroradius, but there is appreciable growth at the reciprocal of the electron gyroradius. This instability may provide wave-particle viscous effects at the magnetopause or stream-stream interfaces in the solar wind.

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