Abstract
If the current density of a glow discharge is raised to about ten times the normal current density, the discharge mechanism is changed. The number of ions produced in the cathodic dark space of such a strong current discharge is no longer sufficient to maintain the discharge. The familiar assumption, that the deficit will be compensated by ions or ultra-violet photons from the negative glows is opposed by measurements on obstructed discharges. The interpretation of the charge balance of the strong currert discharge is made possible by regarding the production of fast atoms by charge exchange in the dark spaces taking into account the additional electron emission at the cathode and the ionizations in the gas caused by such atoms. The same mechanism allows a satisfactory quantitative interpretation of the prebreakdown phenomena. A complete system of equations for the simultaneous description of the weak current and the strong current glow discharge is given. (auth)
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