Physics
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.1691w&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Feb. 1, 1985, p. 1691-1697. Navy-NASA-supported research.
Physics
4
Beam Injection, Plasma Interaction Experiment, Space Environment Simulation, Space Plasmas, Cylindrical Plasmas, Electron Density (Concentration), Electron Energy, Electrostatic Waves, Plasma Density, Plasma Drift, Plasma Jets, Plasma Oscillations, Power Spectra, Wave Propagation
Scientific paper
ELF waves which were observed during beam-plasma discharge in the large vacuum chamber at Johnson Space Center are studied. Phase delays as a function of radius (obtained from cross-correlation measurements of density fluctuations) along with measurements of frequency and plasma potential, density, and temperature have been compared to a zero-order slab model of nonlocal azimuthal drift wave propagation. The inferred wave phase velocity in the plasma frame after Doppler correction is found to be near one half the electron diamagnetic drift velocity. Although the measurements presented do not uniquely define a propagation mode, a model of azimuthal drift wave propagation is found to be consistent with observations.
Szuszczewicz Edward P.
Walker Danny N.
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