This article is cited in 3 papers

The influence of voltage polarity on the regime of atmospheric-pressure glow discharge operation in flows of atomic and molecular gases

A. M. Astafiev^a, O. M. Stepanova^b, M. È. Pinchuk<sup>a

a</sup> Institute of Problems of Electrophysics of the Russian Academy of Sciences, St. Petersburg
^b Saint Petersburg State University

Abstract: Electrical characteristics of atmospheric-pressure glow discharge at constant currents up to 40 mA in flows of atomic and molecular gases have been measured at volume flow rates varied within 0.5–5 L/min. It was found that the voltage drop on the discharge gap in molecular gases depends not only on the flow rate, but also on the polarity of applied voltage. As the gas flow rate increases, the discharge operation in oxygen and nitrogen becomes unstable and the voltage drop on discharge gap increases by several hundred volts. Both these effects are manifested much more strongly for a positive discharge voltage than for the negative voltage. In helium and argon flowing at a preset rate, the voltage polarity on electrodes does not influence the regime of discharge operation.

Keywords: atmospheric pressure glow discharge, discharge in gas flow, current-voltage characteristic, atomic gases, molecular gases.

Received: 06.03.2019
Revised: 06.03.2019
Accepted: 24.09.2019

DOI: 10.21883/PJTF.2019.24.48805.17769

 English version: Technical Physics Letters, 2019, 45:12, 1270–1272

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