Dispenser cathode with emitting surface parallel to ion flow

Details Dispenser cathode with emitting surface parallel to ion flow Dispenser cathode with emitting surface parallel to ion flow

1990-03-29

1991-11-05

DeMeo, Palmer C.

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

313630, 313632, H01J 128, H01J 6109

Patent

active

050633244

ABSTRACT:
A dispenser cathode for a gas filled tube is fabricated from a porous metal material impregnated with an electron emitting material and has on an emitting surface at least one geometric aperture of a given depth and width and having steep vertical walls which serve to compensate for the deleterious effects of ion back bombardment.

REFERENCES:
patent: 2189636 (1940-02-01), Knowles et al.
patent: 2452075 (1948-10-01), Smith
patent: 2937303 (1960-05-01), Germeshausen
patent: 2937304 (1960-05-01), Goldberg et al.
patent: 3849690 (1974-11-01), Cosco et al.

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