ARCS 3 ionospheric artificial argon ion beam injections - Waves near the heavy ion gyrofrequencies

Details ARCS 3 ionospheric artificial argon ion beam injections - Waves near the heavy ion gyrofrequencies ARCS 3 ionospheric artificial argon ion beam injections - Waves near the heavy ion gyrofrequencies

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.2645e&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, March 1, 1989, p. 2645-2653.

Physics

5

Argon Plasma, Artificial Clouds, Gyrofrequency, Ionospheric Propagation, Plasma Waves, Emission Spectra, Heavy Ions, Plasma Generators, Spaceborne Experiments, Thor Delta Launch Vehicle

Scientific paper

Low-frequency electric field data below the proton gyrofrequency are presented for the duration of the argon ion beam experiment conducted as part of the Argon Release for Controlled Studies (ARCS) program. An argon ion beam was injected from the subpayload antiparallel or perpendicular to the magnetic field at altitudes from 250 to 405 km. During the injections, the wave spectra were broadband near the subpayload and narrow-band near heavy ion gyrofrequencies at perpendicular separation distances between 42 and 254 m. It is suggested that the narrow-band waves are associated with both the perpendicular argon ion beam and an unexpected flux of low-energy ions which peaked in energy near 15 eV and pitch angle near 90 deg with respect to the magnetic field.

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