Physics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3109k&link_type=abstract
Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3109-3115. Research supported by the U.S. Defense Nuclear Agency and
Physics
15
Electron Beams, Kinetic Theory, Plasma Waves, Space Plasmas, Wave Generation, Auroral Zones, Collisional Plasmas, Electron Energy, Electron Scattering, Electrostatics, Inhomogeneity, Plasma Frequencies, Solar Corona, Viscous Damping
Scientific paper
The present linear electrostatic kinetic theory of velocity-sheared inhomogeneous electron streams that flow parallel to a magnetic field includes the effects of a density gradient, background plasma, and electron collisions, and is valid for arbitrary ratios among the temperatures of sheared electrons, background electrons, and background ions. For hot electron streams, a new resonant stability is found which is driven by velocity shear whose frequency is near the lower hybrid frequency. This mode is characterized by wave numbers whose product with the sheared electron gyroradius is less than approximately unity and is damped by collisional effects. The theory is applied to wave turbulence in the auroral zone and solar corona.
Huba Joseph D.
Keskinen Michael J.
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