Abstract
Emission of positively charged ions from a plasma emitter irradiated by a counterpropagating electron beam is studied theoretically. A bipolar diode with a plasma emitter in which the ion temperature is lower than the electron temperature and the counter electron flow is extracted from the ion collector is calculated in the one-dimensional model. An analog of Bohm’s criterion for ion emission in the presence of a counterpropagating electron beam is derived. The limiting density of the counterpropagating beam in a bipolar diode operating in the space-charge-limited-emission regime is calculated. The full set of boundary conditions on the plasma emitter surface that are required for operation of the high-current optics module in numerical codes used to simulate charged particle sources is formulated.
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Original Russian Text © V.T. Astrelin, I.A. Kotelnikov, 2017, published in Fizika Plazmy, 2017, Vol. 43, No. 2, pp. 122–133.
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Astrelin, V.T., Kotelnikov, I.A. Boundary conditions on the plasma emitter surface in the presence of a particle counter flow: I. Ion emitter. Plasma Phys. Rep. 43, 129–140 (2017). https://doi.org/10.1134/S1063780X17020027
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DOI: https://doi.org/10.1134/S1063780X17020027