Other
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.5811b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, June 1, 1988, p. 5811-5822.
Other
32
Beam Interactions, Electron Beams, Plasma Interaction Experiment, Spaceborne Experiments, Space Commercialization, Space Shuttle Payloads, Television Transmission
Scientific paper
Observations of a 100-mA, 1-keV electron beam were made with a low light level TV system and other instruments aboard the space shuttle STS 3 in March 1982. When fired at a moderate pitch angle with respect to the magnetic field, the beam electrons initially moved outward along a classical helical trajectory. Within a short distance, however, the beam electrons were deflected away from the helical trajectory into paths parallel to magnetic field lines threading the primary helix. This resulted in the formation of a thin-walled, cylindrical electron beam structure having a radius equal to the primary beam gyroradius. This structure, which is consistent with earlier laboratory vacuum chamber observations and recent two-dimensional computer electrostatic plasma simulations, has important implications for determining the extent to which pulsed electron beams can radiate electromagnetic energy in the ionosphere.
Banks Peter M.
Raitt William J.
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