Self-limiting x-ray tube with flat cathode and stair-step focusi

Details Self-limiting x-ray tube with flat cathode and stair-step focusi Self-limiting x-ray tube with flat cathode and stair-step focusi

1989-06-30

1991-07-16

Westin, Edward P.

X-ray or gamma ray systems or devices

Source

Electron tube

378136, 378137, 313 37, 313453, H01J 3514

Patent

active

050330721

ABSTRACT:
Problems of thermal resistance of the anode of an x-ray tube are solved by constructing a flat cathode which is set within a stair-step focusing device. It is shown that, depending on the shape of this device, the heat output on the anode is limited by a saturation value which is lower than a limit of thermal resistance of the x-ray tube. In order to improve the thermal resistance of the cathode, a cathode is constructed in the form of a hollow beam. This ensures rigidity of the cathode which is inherent in its beam shape without being attended by the disadvantages of excessive thermal inertia.

REFERENCES:
patent: 1923876 (1931-02-01), Mutscheller
patent: 2564743 (1951-08-01), Wang
patent: 2726346 (1955-12-01), Busby et al.
patent: 4344011 (1982-08-01), Hayashi et al.
patent: 4764947 (1988-08-01), Lesensky
patent: 4777642 (1988-10-01), Ono
patent: 4788705 (1988-11-01), Anderson
patent: 4868842 (1989-09-01), Dowd
Patent Abstracts of Japan, vol. 2, No. 64, (E-33)[2148], May 17, 1978, p. 2148 E 78; & JP-A-53 30 292 (Tokyo Shibaura Denki K.K.).
Patent Abstracts of Japan, vol. 4, No. 157 (E-32)[639], Nov. 4, 1980, p. 131 E 32; & JP-A-55 108 158 (Hitachi Seisakusho K.K.).

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