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Research Article Open access CC BY 3.0

Effect of Polarity of the Voltage Pulse on the Appearance of the Discharge at the Breakdown in the Non-uniform Electric Field

D. V. Beloplotov, M. I. Lomaev, D. A. Sorokin, V. F. Tarasenko

Physical Science International Journal · pp. 686–691 · Published 15 Feb 2014

10.9734/PSIJ/2014/8590

Abstract

At the pressures 0.5-3 atm of the air, nitrogen, argon and sulfur hexafluoride (SF6) an appearance of the nanosecond discharge in the nonuniform electric field is investigated. In all gases at the negative polarity of the voltage pulses, supershort avalanches electron beam (SAEB) and (or) x-ray were registered.  It was obtained, that formation of the bright spots on the flat electrode at the negative polarity of the electrode with small radius of curvature was observed during the changing of the discharge current polarity. It was shown, that at the positive polarity of the electrode with a small radius of curvature bright spots on the flat electrode arise due to the participation of the dynamic displacement current in the gap conductance.  

Nonuniform electric field runaway electron preionized diffuse discharge air; nitrogen argon and sulfur hexafluoride dynamic displacement current supershort avalanches electron beam

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