X-ray tubes

Details X-ray tubes X-ray tubes

1976-10-12

1978-11-21

Rolinec, Rudolph V.

Electric lamp and discharge devices

With radioactive material

313 55, 313346R, H01J 3500

Patent

active

041268059

ABSTRACT:
An X-ray tube is described in which, in order to produce a well defined electron beam which can be accurately focussed on the target of the tube, the cathode comprises a flat plate member, such as a tape or foil, the surface finish of which is sufficiently smooth that electrons are emitted therefrom with lateral energies below 0.2 electron volts. The aforementioned surface finish is such that irregularities in the electron-emitting surface of the cathode do not exceed one micron in amplitude.

REFERENCES:
patent: 2362816 (1944-11-01), Harker
patent: 3046430 (1962-07-01), Green

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