X-ray tube with an electron shielding ridge on the cathode

Details X-ray tube with an electron shielding ridge on the cathode X-ray tube with an electron shielding ridge on the cathode

1989-11-06

1991-04-16

Westin, Edward P.

X-ray or gamma ray systems or devices

Source

Electron tube

378136, 378144, 378145, 378203, H01J 3506, H01J 518

Patent

active

050089170

ABSTRACT:
An anode and a cathode are in an evacuated metal envelope comprising a radiation exit window and which carry a positive and a negative high voltage, respectively, with respect thereto during operation. The cathode, at its area which neighbors the radiation exit window, has a ridge segment which extends in the axial direction partially about the cathode filament. The segment shields the radiation exit window from the electrons emitted by the cathode to reduce heating of the window by the electrons.

REFERENCES:
patent: 2107597 (1938-02-01), Bouwers et al.
patent: 2926270 (1960-02-01), Zunick
patent: 3250916 (1966-05-01), Rogers
patent: 3549931 (1970-12-01), DeLucia
patent: 4024424 (1977-05-01), Eggelsmann et al.
patent: 4309637 (1982-01-01), Fetter
patent: 4698835 (1987-10-01), Ono et al.

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