Effects of an acoustic wave in the positive column of a glow discharge.
Gilmartin, John Thomas
Cooper, Alfred W.
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An alternating current produced by an acoustic wave in the positive column region of a glow discharge in nitrogen gas under dc conditions was measured using a magnetic probe in the form of a Rogowsky Ring. The electrodynamic speaker which generated the acoustic wave was calibrated in nitrogen gas in terms of acoustic pressure for frequencies from 50 Hz to 250 Hz at ambient pressures corresponding to glow discharge pressures through the use of a specially constructed mobility-limited thermionic diode. The frequency of the perturbation current was found to be the same as the frequency of the acoustic wave and its magnitude was a function of ambient pressure, dc discharge current, acoustic pressure, and acoustic frequency.
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