Abstract
In this work current-voltage characteristics of a glow discharge flowing in narrow long tubes are investigated. The studies were carried out on a specially developed layout, which includes discharge tubes of various diameters. The model was connected to the pumping and filling system, which allows varying the gas content and working pressure. The discharge was excited in pure carbon dioxide gas, as well as mixtures based on it: carbon dioxide with nitrogen in the ratio 1:1, carbon dioxide with helium in the ratio 1:8, and also carbon dioxide, nitrogen and helium in the ratio 1:1:8. An approximating expression is obtained for the CVC in the form of a power function including the discharge current, the length of the discharge gap, and the longitudinal potential gradient calculated in the automated mode.
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