Computer Science – Sound
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96..225e&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Jan. 1, 1991, p. 225-238. Research supported by the University of Cal
Computer Science
Sound
27
Auroral Electrojets, Electron Bunching, Electrostatic Waves, Magnetic Storms, Solar Terrestrial Interactions, Electron Energy, Particle Interactions, Type 3 Bursts, Wave Interaction
Scientific paper
Recent measurements of auroral electrons and intense Langmuir waves on a high-altitude sounding rocket launched northward into the evening auroral zone during a substorm expansion show that these waves were produced by dispersive bursts of low-energy electrons. Electron bunching was detected at the wave frequency during the wave bursts. The bunching events were detected at or near the energy at which a positive slope in the electron distribution function was seen. During a dispersive burst, the phase velocity of the Langmuir waves changed in response to the changing velocity at which the positive slope occurred. It is concluded that the velocity dispersion in the low-energy, field-aligned electrons created the unstable electron distribution that was responsible for Langmuir wave growth.
Boehm M. H.
Carlson Carl W.
Clemmons James Hart
Ergun Robert E.
McFadden James P.
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