Cathode-current ratio in a reflective hollow-cathode discharge

The current ratio has been examined for hollow and planar cathodes as affected by the gas type and flow rate; a model is proposed that gives an expression in qualitative agreement with experiment.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 64–67, April, 1990.We are indebted to E. M. Oks for assistance in the experiments and valuable comments.