Cathode

Details Cathode Cathode

2011-01-04

2011-01-04

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Source

Electron tube

C313S348000

Reexamination Certificate

active

07864925

ABSTRACT:
A cathode has a cathode head in which is arranged a surface emitter is arranged that emits electrons upon the application of a heating voltage. At least one electrically conductive barrier plate that is galvanically separated from the surface emitter extends up to the surface emitter. This cathode has a longer lifespan, a high electron emission and a good blocking capability.

REFERENCES:
patent: 3934168 (1976-01-01), Hardman et al.
patent: 4593230 (1986-06-01), True
patent: 2007/0246789 (2007-10-01), Freudenberger et al.
patent: 27 27 907 (1979-01-01), None
patent: 199 14 739 (2000-08-01), None
patent: 199 55 845 (2001-05-01), None

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