Abstract

When the plasma is unable to provide the positive anode sheath with ions (small anode, low anode plasma conductivity, ablating anode), the ions must be generated inside the sheath itself. The Poisson equation for the sheath with ion generation is solved. The ion flux from the sheath to the neutral plasma is obtained as a function of the anode voltage drop. It is shown that in the case of highly intensive ion generation, the mode with monotonous potential ceases to exist. It is hypothesized that a double layer is formed. It is suggested that the analysis could be applicable to the anode layer of a glow discharge.

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