Cross-B convection of artificially created, negative-ion clouds and plasma depressions - Low-speed flow

Details Cross-B convection of artificially created, negative-ion clouds and plasma depressions - Low-speed flow Cross-B convection of artificially created, negative-ion clouds and plasma depressions - Low-speed flow

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.8696b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Aug. 1, 1988, p. 8696-8704. DOE-NASA-supported research.

Physics

15

Artificial Clouds, F Region, Geomagnetism, Magnetohydrodynamic Flow, Negative Ions, Plasma Clouds, Cross Flow, Positive Ions, Traveling Ionospheric Disturbances, Wind Velocity

Scientific paper

A negative-ion, positive-ion plasma produced by the release of an electron attachment chemical into the F region becomes electrically polarized by collisions with neutrals moving across magnetic field lines. The resulting electric field causes E x B drift of the two ion species and the residual electrons. The cross-field flow of the modified ionosphere is computed using a two-dimensional numerical simulation which includes electron attachment and mutual neutralization chemistry, self-consistent electric fields, and three-species plasma transport. The velocity of the plasma is initially in the direction of the neutral wind because the negative-ion cloud is a Pedersen conductivity enhancement. As the positive and negative ions react, the Pedersen conductivity becomes depressed below the ambient value and the velocity of the plasma reverses direction. A plasma hole remains after the positive and negative ions have mutually neutralized. The E x B gradient drift instability produces irregularities on the upwind edge of the hole.

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