Characteristics of two types of Beam Plasma Discharge in a laboratory experiment

Details Characteristics of two types of Beam Plasma Discharge in a laboratory experiment Characteristics of two types of Beam Plasma Discharge in a laboratory experiment

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..565b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, July 1983, p. 565-568.

Physics

24

Electric Discharges, Electron Beams, Plasma-Particle Interactions, Electron Guns, Ion Currents, Magnetic Fields, Plasma Jets, Scaling Laws

Scientific paper

Experiments on the Beam Plasma Discharge (BPD) using an electron beam traveling along a magnetic field have been carried out in a large volume laboratory vacuum chamber. Two different types of BPD have been observed, and scaling laws for varying neutral gas pressure, axial magnetic field, interaction length and electron flux, deduced. The second type of BPD occurs when the beam current is increased well above the threshold for the first type. The transition from the first type to the second, like the ignition of the first, is distinguished by abrupt changes of luminosity, discharge diameter, and wave emission signature.

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