Large-scale longitudinal dumping of auroral electrons

Details Large-scale longitudinal dumping of auroral electrons Large-scale longitudinal dumping of auroral electrons

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976kosis..14..531w&link_type=abstract

Kosmicheskie Issledovaniia, vol. 14, July-Aug. 1976, p. 531-542. In Russian.

Physics

Auroral Electrojets, Electron Precipitation, Polar Substorms, Radiation Belts, Satellite Observation, Cosmos Satellites, Ionospheric Electron Density, Plasma Layers

Scientific paper

Pitch angle distributions of auroral electrons, energy range 1-159 keV, were measured by the Kosmos-261 and Kosmos-348 satellites spinning about their respective centers of mass. The bulk of the measurements are isotropic distributions corresponding to weak and pronounced diffusion. Large-scale longitudinal distributions similar to those discerned in ISIS satellite data were observed, predominantly in the post-midnight and pre-dawn sectors on closed envelopes of the polar auroral belt on magnetically quiet days during substorm recovery phases. Their origin is attributed to inward drifting of particles exhibiting a longitudinal distribution at the plasma sheath. Fermi acceleration, scattering of particles in the plasma layer, and conduction in the auroral ionosphere are discussed.

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