Auroral particles connected with nonlinear Alfven waves

Details Auroral particles connected with nonlinear Alfven waves Auroral particles connected with nonlinear Alfven waves

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ge%26ae..26..275c&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 26, Mar.-Apr. 1986, p. 275-282. In Russian.

Computer Science

2

Auroral Zones, Electron Flux Density, Ion Density (Concentration), Magnetohydrodynamic Waves, Plasma-Particle Interactions, Intercosmos Satellites, Particle Acceleration

Scientific paper

An analysis is made of Intercosmos-Bulgaria-1300 satellite measurements of electron and ion fluxes with energies of 0.4-15 keV and six components of the electromagnetic field in the 0.1-8 Hz range. The data reveal fluxes of electrons transported by Alfven waves in the auroral plasma. Particle precursors were observed: discrete bursts of KeV-electrons, detected several seconds before an electromagnetic jump at 800-900 km and appearing as the result of local particle acceleration above the satellite at a distance of several earth-radii in the auroral zone. It is shown that the appearance of ascending fluxes of hot (superthermal) ions may be due to the partial dissipation of electromagnetic-jump energy through collisions in the ionosphere.

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