CATHODE-COMPENSATOR Russian patent published in 2019 - IPC H01J37/77 H05H1/54 F03H1/00 

FIELD: electricity.

SUBSTANCE: invention relates to plasma engineering, namely to hollow cathodes operating on gaseous working bodies, and can be used in electric jet engines, as well as in plasma process sources intended for ion-plasma treatment of surfaces of different materials in vacuum, as well as an autonomous functioning plasma source. Cathode-compensator comprises hollow capsule 1 with thermoemitter 2, which envelopes filament spiral 3 surrounded by insulating tube 4, on top of which heat shields 5, spiral holder 6, igniting electrode 7 and a gas supply tube 8 are located. Insulating tube has inner diameter smaller than outer diameter of filament spiral, and on inner surface of insulating tube there is screw-like groove 9 with pitch of filament spiral, wherein they are mutually conjugated with matching their azimuthal positioning. Insulation tube 4 can be made of at least two longitudinal parts 4a and 4b.

EFFECT: increased resource and increased reliability of operation.

1 cl, 2 dwg