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Waves generated in the vicinity of an argon plasma gun in the ionosphereWave and particle observations were made in the close vicinity of an argon plasma gun carned to over 600 km altitude on a sounding rocket. The gun was carned on a subpayload, separated from the main payload early in the flight. Twelve-second argon ion ejections were energized alternately with a peak energy of 100 or 200 eV. They produced waves, with multiple harmonics, in the range of ion cyclotron waves, 10 to 1000 Hz at rocket altitudes. Many of these waves could not be identified as corresponding to the cyclotron frequencies of any of the ions, argon or ambient, known to be present. In addition, the wave frequencies were observed to rise and fall and to change abruptly during a 12-s gun operation. The wave amplitudes, near a few hundred Hertz, were of the order of O. 1 V/m. Some of the waves may be ion-ion hybrid waves. Changes in ion populations were observed at the main payload and at the subpayload during gun operations. A gun-related, field-aligned, electron population also appeared.
Document ID
19930060133
Document Type
Reprint (Version printed in journal)
Authors
Cahill, L. J., Jr. (Minnesota Univ. Minneapolis, United States)
Arnoldy, R. L. (New Hampshire Univ. Durham, United States)
Lysak, R. L. (Minnesota Univ. Minneapolis, United States)
Peria, W. (NASA Wallops Flight Facility Wallops Island, VA, United States)
Lynch, K. A. (New Hampshire Univ. Durham, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: A6
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG6-12
CONTRACT_GRANT: NAG6-11
Distribution Limits
Public
Copyright
Other