Investigation of the conditions for the formation of the second point of electric field reversal of the sign in the glow discharge

E. I. Prokhorova^a, A. A. Kudryavtsev^bc, A. A. Platonov^a, A. G. Slyshov<sup>a

a</sup> Petrozavodsk State University, Petrozavodsk, Russia
^b Saint Petersburg State University, St. Petersburg, Russia
^c Harbin Institute of Technology, Harbin, China

Abstract: An experimental study of the longitudinal distribution of glow discharge parameters in argon in the pressure range 0.1–0.7 Torr at a discharge current of 10 mA has been carried out. The longitudinal distributions of electron concentration and temperature and space potential are obtained by the method of the second derivative of the probe current. The glow of the discharge was studied using a photomultiplier. Analysis of the measured data shows that at low pressures there is one point of reversal of the field in the middle of the luminous region corresponding to the maximum plasma density. At the same time, the surface of the anode is dark, the anode drop is negative (repels electrons). With increasing pressure, a luminous film appears on the anode and a second field reversal point is formed. The anode drop is positive (attracts electrons).

Keywords: inverse electron distribution function, points field reversal, glow discharge.

Received: 24.11.2023
Revised: 24.11.2023
Accepted: 27.11.2023

DOI: 10.61011/PJTF.2024.05.57178.19814

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