A first-principles model for orificed hollow cathode operationA theoretical model describing orificed hollow cathode discharge is presented. The approach adopted is based on a purely analytical formulation founded on first principles. The present model predicts the emission surface temperature and plasma properties such as electron temperature, number densities and plasma potential. In general, good agreements between theory and experiment are obtained. Comparison of the results with the available related experimental data shows a maximum difference of 10 percent in emission surface temperature, 20 percent in electron temperature and 35 percent in plasma potential. In case of the variation of the electron number density with the discharge current a maximum discrepancy of 36 percent is obtained. However, in the case of the variation with the cathode internal pressure, the predicted electron number density is higher than the experimental data by a maximum factor of 2.
Document ID
19920071521
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Salhi, A. (NASA Lewis Research Center Cleveland, OH, United States)
Turchi, P. J. (Ohio State University Columbus, United States)