Abstract
Effects of impurities on the characteristics of high-voltage glow discharges are theoretically studied. These glow discharges are established during a few microseconds between two plane parallel electrodes separated by a few centimeters under a deuterium pressure of about 0.1 mmHg, at currents of the order of 1–10 A, and voltages of about 100 kV. With tritium-loaded cathodes, high-voltage discharge tubes produce neutron pulses. In a one-dimensional theoretical treatment of the discharge, we take into consideration complex processes: charge exchange, ionization of gas by ions, and ion dissociation. Our model shows that some gaseous impurities increase the neutron emission level. Computed variations of neutron output and discharge characteristics as a function of impurity partial pressure are in good agreement with experimental values.
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