Physics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..925l&link_type=abstract
Geophysical Research Letters, vol. 9, Sept. 1982, p. 925-928. Research supported by the Southwest Research Institute
Physics
47
Distribution Functions, Dynamics Explorer 1 Satellite, Electron Distribution, Maxwell-Boltzmann Density Function, Satellite Observation, Space Plasmas, Electric Fields, Electron Beams, Electron Energy, Magnetic Field Configurations, Particle Interactions, Wave Interaction
Scientific paper
Observations of plasma at altitudes of 2-3 earth radii with the High Altitude Plasma Instrument (HAPI) on DE-1 indicate two distinct types of counterstreaming electron events. The type 1 event is characterized by two Maxwellian distribution functions, an isotropic high-temperature component and a field-aligned low temperature component. The type 2 event is distinguished by beams parallel and antiparallel to the magnetic field direction. The observations suggest two distinct mechanisms for accelerating counterstreaming electrons. Type 1 events appear to involve wave-particle interactions while type 2 events imply direct acceleration by oppositely-directed electric fields pointing toward the satellite along magnetic field lines.
Burch James. L.
David Winningham J.
Hoffman Robert A.
Lin Chang-Shou
Menietti Douglas J.
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