Other
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3116b&link_type=abstract
Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3116-3126.
Other
40
Auroral Arcs, Computerized Simulation, Electron Scattering, Electrostatics, Magnetohydrodynamic Stability, Plasma Layers, Atmospheric Scattering, Backscattering, Electron Cyclotron Heating, Ionospheric Ion Density
Scientific paper
A magnetized 2 1/2-dimensional particle-in-cell system which is periodic in one direction and bounded by reservoirs of Maxwellian plasma in the other is used to numerically simulate electrostatic plasma double layers. For the cases of both oblique and two-dimensional double layers, the present results indicate periodic instability, Debye length rather than gyroradii scaling, and low frequency electrostatic turbulence together with electron beam-excited electrostatatic electron-cyclotron waves. Estimates are given for the thickness of auroral doule layers, as well as the separations within multiple auroral arcs. Attention is given to the temporal modulation of accelerated beams, and the possibilities for ion precipitation and ion conic production by the double layer are hypothesized. Simulations which include the atmospheric backscattering of electrons imply the action of an ionospheric sheath which accelerates ionospheric ions upward.
Borovsky Joseph E.
Joyce Geoffrey
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