PLASMA GRID CATHODE BASED ON ARC DISCHARGE IN A MAGNETIC FIELD FOR GENERATION ELECTRON BEAM OF VARIABLE DIAMETER

Vladimir Devyatkov, N.N. Koval
IHCE SB RAS, Tomsk, Russian Federation

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VA
V.T. Astrelin 2020-09-16 15:57
May be, a discharge begin between cathode grid and redistr. electrode (RE), supported by ion flow from the transporting area (TA) and electron flow from RE due to ion-electron secondary emission? For small B1 plasma in TA may diffuse to axis easy.
VD
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Vladimir Devyatkov 2020-09-16 15:57
The voltage between the R-E electrode and the grid occurs only when the discharge current flows from the cathode to the R-E. Although the voltage across Ra will provide the addition of secondary electrons from the R-E electrode to the beam, the contribution to the overall picture is probably not so great at the nominal operating pressure.
VA
V.T. Astrelin 2020-09-16 15:57
May be, of course... But all events occur simultaneously and contribution of this discharge may be not small.

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