期刊
PLASMA PHYSICS REPORTS
卷 49, 期 8, 页码 1031-1037出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063780X23600846
关键词
hollow cathode; discharge plasma; electron energy distribution function; electron density; anode layer; simulation; Monte Carlo method
The electron energy distribution function (EEDF) and the spatial profile of the electron density in the cathode-anode gap in a helium discharge were calculated using the Monte Carlo method within a one-dimensional model. The effects of cathode-anode distance, helium pressure, and electric field strength on the EEDF and electron density were studied, and the results were compared with experimental data.
The electron energy distribution function (EEDF) and the spatial profile of the electron density in the cathode-anode gap in a helium discharge are calculated within a one-dimensional model by the Monte Carlo method. Numerical studies are performed for experimental conditions known from the literature in a discharge with a hollow cathode: the cathode-anode distance of 3 cm, the helium pressure of 0.75 Torr, and the electric field strength in the discharge gap of 1.3 V/cm. The calculations are performed without and with allowance for the anode potential drop and the effect of electron reflection from the anode. The dependence of the form of EEDF on the energy spectrum of the electron source used in the calculations is also studied. In all variants of calculations, the main feature of the EEDF is retained, that is, a significant depletion of the low-energy part of the distribution function due to the effect of electron absorption by the anode. The calculated EEDF and the spatial profile of the electron density are compared with the available experimental data.
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