Dynamics of secondary-electron fluxes above the auroral ionosphere in reverse-current regions

Details Dynamics of secondary-electron fluxes above the auroral ionosphere in reverse-current regions Dynamics of secondary-electron fluxes above the auroral ionosphere in reverse-current regions

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ge%26ae..28..402g&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 28, May-June 1988, p. 402-408. In Russian.

Physics

Auroral Zones, Electron Transfer, Ionospheric Currents, Ionospheric Electron Density, Magnetohydrodynamic Stability, Plasma Waves, Distribution Functions, Electric Fields, Plasma Dynamics

Scientific paper

An upward-directed flux of secondary electrons of quasi-beam type, unstable with respect to the excitation of plasma waves, is shown to arise above the ionosphere in the reverse-current region, where a longitudinal electric field is directed toward the earth. The amplification of these waves is sufficient for the development of instability. The spectra of plasma noise excited by the secondary-electron fluxes are investigated. The instability induced by the secondary electrons is stabilized by quasi-linear relaxation of their beams.

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