Computer Science – Sound
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28.1131g&link_type=abstract
Planetary and Space Science, vol. 28, Dec. 1980, p. 1131-1145. Research sponsored by the Norges Teknisk-Naturvitenskapelige Fors
Computer Science
Sound
6
Auroral Irradiation, Beam Injection, Electron Beams, Ionospheric Sounding, Plasma Waves, Stimulated Emission, Wave Excitation, High Frequencies, Plasma-Particle Interactions, Very Low Frequencies
Scientific paper
Observations of waves stimulated by artificial injection inside an auroral arc by an electron accelerator mounted on the POLAR 5 sounding rocket are presented. The accelerator produced a pulsed electron beam with currents up to 130 mA and energies up to 10 keV; emissions after the end of beam injection were generated by perturbations in the ambient plasma near the accelerator during beam injection. These emissions were independent of the electron beam direction along the geomagnetic field. The high frequency emission observed after beam injection correlated with the passage through an auroral arc; the low frequency emissions after beam injection were concentrated in two bands below the lower hybrid frequency.
Grandal B.
Holtet J. A.
Maehlum B.
Pran B.
Troim J.
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