Hollow cathode glow discharge in long tubes |
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Authors: | S P Nikulin |
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Institution: | (1) Institute of Electrophysics, Urals Branch of the Russian Academy of Sciences, 620219 Ekaterinburg, Russia |
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Abstract: | An analysis is made of some burning characteristics of a hollow-cathode glow discharge with a long tube (L≫D) used as the cathode. It is shown that, as in the case L∼D, the main factor imposing a lower limit on the range of operating voltages is the drift of fast electrons through the aperture
in the cavity. Assuming that the electrons move along the cavity as a result of diffusion, it was possible to calculate the
critical pressure at which the discharge can no longer burn and to determine the optimum ratio L/D for which the discharge can be sustained at the lowest voltage. The calculations showed satisfactory agreement with the experiment.
Zh. Tekh. Fiz. 69, 36–39 (June 1999) |
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