Electron emitter for an x-ray tube

Details Electron emitter for an x-ray tube Electron emitter for an x-ray tube

1991-08-01

1992-12-08

Porta, David P.

X-ray or gamma ray systems or devices

Source

Electron tube

378138, 313346R, H01J 3506

Patent

active

051704226

ABSTRACT:
An electron emitter for an x-ray tube is formed by a geometrical member that is completely filled with electron-emitting material. This emitter can be excited to emit electrons over its entire side facing toward the anode. The electron-emitting material is composed of a mixture of conductive metal powder and a non-conductive powder or a ceramic material. A uniform distribution of the electrons in the focal spot of the anode is obtained in substantially all expected operating conditions of an x-ray tube, so that the x-radiation generated in the focal spot is correspondingly uniform. Further, the electron emitter can be manufactured in a simple manner.

REFERENCES:
patent: 3303372 (1967-02-01), Gager
patent: 3700951 (1972-10-01), Clarke et al.
patent: 3833494 (1974-09-01), Van Stratum et al.
patent: 3970888 (1976-07-01), Tratiner
patent: 4012656 (1977-03-01), Norman et al.
patent: 4150318 (1979-04-01), Kerstetter
patent: 4151440 (1979-04-01), Buescher
patent: 4250429 (1981-02-01), Lersmacher et al.
patent: 4291252 (1981-09-01), Aida et al.
patent: 4661740 (1987-04-01), Knoch et al.
patent: 4730353 (1988-03-01), Ono et al.
patent: 4752713 (1988-06-01), Buxbaum

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