Electric and magnetic field measurements inside a high-velocity neutral beam undergoing ionization

Details Electric and magnetic field measurements inside a high-velocity neutral beam undergoing ionization Electric and magnetic field measurements inside a high-velocity neutral beam undergoing ionization

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.9703k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, June 1, 1991, p. 9703-9718.

Physics

20

Artificial Clouds, Barium, Earth Ionosphere, Geoelectricity, Geomagnetism, Magnetic Field Configurations, Cyclotron Radiation, Electrical Measurement, Frequency Distribution, Plasma-Electromagnetic Interaction

Scientific paper

Vector electric field measurements were made inside two ionizing, high-velocity streams of barium atoms in the earth's ionosphere, and a variety of electrical phenomena across the frequency spectrum are reported. A very large quasi-dc electric field was detected antiparallel to the beam velocity at a roughly 45 deg angle with the magnetic field B0. A very large component of E is found parallel to B0. The fluctuating electric fields are also quite large, of the same order of magnitude as the quasi-dc pulse. The wave energy maximizes at frequencies below the barium lower hybrid frequency and includes strong signatures of the oxygen cyclotron frequency. Measurements made on a subpayload separated across B0 by several hundred meters and along B0 by several km do not show the large pulse. Very large amplitude magnetic field fluctuations were observed in both bursts.

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