Abstract
In this paper attention is focused on the possibility of obtaining a high production of negative hydrogen ions H− within the volume of a nonequilibrium reflex discharge plasma for gas pressure levels from 0.1 to 10 Pa. To obtain the best values for both the negative hydrogen ion density n− and the negative ion fraction n−/ne the operating conditions are optimized as a function of pressure, discharge power, and magnetic field. The experiment shows that the reflex discharge steady-state plasma is uniform for a dissipated power P = 400 W and has the best efficiency within the pressure range from 0.5 to 2.0 Pa, where the negative ion density is almost 1017 m−3, and the negative ion fraction n−/ne is almost 2.5%.
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