Non-self-sustained glow discharge with hollow cathode at low combustion voltages

The results of the study of low-voltage burning modes of a non-self-sustained glow discharge with a hollow cathode with a volume of ~ 0.2 m³ at low (≈ 1 Pa) pressure supported by external injection of electrons from an arc plasma are presented. The current-voltage characteristics obtained at low 20-80 V combustion voltages show that there is a threshold combustion voltage of a glow discharge at which there is an abrupt transition from the burning conditions with high plasma heterogeneity to conditions with uniform plasma emission from plasma in the entire hollow cathode. Such a transition with an enhancement of the hollow cathode effect is characterized by an increase in the main discharge current by 20-40 %. The combustion voltage of a glow discharge at which a jump occurs lies in the range 45-60 V, and it depends on the value of an auxiliary discharge current and the operating pressure.

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