Oscillatory current behavior in a pulsed gas discharge in atmospheric-pressure helium

V. S. Kurbanismailov^a, G. B. Ragimkhanov^a, D. V. Tereshonok^b, Z. R. Khalikova<sup>a

a</sup> Daghestan State University, Makhachkala
^b Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: This paper presents the results of an experimental study of a pulsed gas discharge in helium at pressures of 1–3 atm in a plane-parallel gap with a mesh cathode and preliminary ultraviolet preionization. At an electron density of about 10$^8$ cm$^{-3}$, the discharge was initiated at voltages ranging from 3 to 14 kV. Analysis of current oscillograms revealed two stable regimes-aperiodic and oscillatory-differing in amplitude and pulse duration. It is shown that within a certain range of parameters-initial voltage, ballast resistance, and gas pressure-the current oscillation period, when present, remains constant.

Keywords: pulsed gas discharge, helium, preionization, mesh cathode, oscillatory regime.

Received: 03.07.2025
Revised: 17.07.2025
Accepted: 21.07.2025

DOI: 10.61011/PJTF.2025.21.61520.20429

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