Abstract
Results are presented from experimental studies of the structure of an ac surface discharge excited by a metal needle over a plane dielectric surface. A barrier corona discharge was ignited in atmospheric-pressure argon at frequencies of the applied sinusoidal voltage from 50 Hz to 30 kHz. In experiments, the area of a dielectric covered with the discharge plasma increased with applied voltage. The discharge structure in diffuse and streamer modes was recorded using a digital camera and a high-speed image tube operating in a frame mode. It is found that, in the positive and negative half-periods of the applied voltage, the structure of the surface discharge is substantially different. The statistical characteristics of the branching surface streamers in the positive and negative half-periods are determined as functions of the voltage frequency. The most intense lines in the emission spectrum of the barrier corona are determined for both half-periods. The correlation between the dynamics of the emission intensity and the dynamics of the discharge current and voltage is investigated.
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Translated from Fizika Plazmy, Vol. 30, No. 12, 2004, pp. 1088–1104.
Original Russian Text Copyright © 2004 by Akishev, Aponin, Karal’nik, Monich, Trushkin.
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Akishev, Y.S., Aponin, G.I., Karal’nik, V.B. et al. Structure of the surface streamers of an AC barrier corona in argon. Plasma Phys. Rep. 30, 1012–1027 (2004). https://doi.org/10.1134/1.1839955
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DOI: https://doi.org/10.1134/1.1839955