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The use of a louvered redistributing electrode in a plasma electron emitter based on a low-pressure arc
Moskvin P.V.
1, Mokeev M.A.
1, Vorobyov M.S.
1, Gorkovskaia D.A.
1, Devyatkov V.N.
1, Koval N.N.
1, Doroshkevich S.Yu.
1, Grishkov A.A.
1
1Institute of High Current Electronics, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia
Email: maks_mok@mail.ru
The paper presents the results on the generation of a pulsed electron beam using a special louver-shaped redistributing electrode in a source with a plasma emitter based on a low-pressure arc with grid stabilization of the cathode plasma boundary and a plasma anode with an open plasma boundary. The configuration of the electrode makes it possible to realize its geometric transparency close to zero for the flow of ions entering the space of the plasma emitter from the anode/beam plasma, but, at the same time, non-zero and, meanwhile, variable transparency for plasma discharge electrons, which makes it possible to ensure efficient electron selection through the grid with the ability to control the density of the emission current to generate an intense (tens to hundreds of amperes) wide (ones to tens of cm2) electron beam of submillisecond duration, at accelerating voltages up to 15 kV. Keywords: arc discharge, grid plasma emitter, electron source, redistributing electrode, plasma emission boundary, open plasma boundary, distribution of emission current density.
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