Computer Science – Sound
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10.1124b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 10, Nov. 1983, p. 1124-1127.
Computer Science
Sound
9
Airglow, Beam Injection, Electron Beams, Ionospheric Sounding, Lower Ionosphere, Plasma Interaction Experiment, Atmospheric Pressure, Beam Plasma Amplifiers, Collisionless Plasmas, Ionospheric Composition, Ionospheric Electron Density, Ionospheric Ion Density, Plasma Jets, Plasma-Particle Interactions
Scientific paper
Recent electron beam injection experiments in the lower ionosphere have produced two perplexing results: (1) At altitudes from 140 km to 220 km, the beam associated 391.4 nm intensity is relatively independent of altitude despite the decreasing N2 abundance. (2) The radial extent of the perturbed region populated by beam associated energetic electrons significantly exceeds the nominal gyrodiameter for 90 deg injection. A series of laboratory measurements is described in which both of these flight results appear to have been closely reproduced. The laboratory results are reasonably consistent with the transition from a collision dominated to collisionless beam-plasma discharge configuration.
Bernstein William
Konradi Andrei
McGarity John O.
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