X-ray tube comprising an exit window

Details X-ray tube comprising an exit window X-ray tube comprising an exit window

1991-01-25

1994-11-22

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Source

Electron tube

378136, H01J 3500

Patent

active

053675533

ABSTRACT:
An electron-optical system directs an electron beam which emanates, for example from a line-shaped or annular emissive cathode element, onto an anode target face in a collimated fashion so that a large part of reflected electrons is incident on the target face again, thus contributing to the generating of X-rays. The construction of the electron-optical system and the high degree of re-incidence of scattered electrons allows for a minimum distance between the anode target face and the exit window. A filament of the cathode may be constructed so as to achieve an optimally uniform operating temperature over a comparatively large part of its length.

REFERENCES:
patent: 2679017 (1954-05-01), Rogers et al.
patent: 3517195 (1970-06-01), Leavitt
patent: 4017757 (1977-04-01), DeCou, Jr.
patent: 4870671 (1989-09-01), Hershyn
Heritage et al "Electron Gun for Generating x-rays", Nov., '74, p. 1823.
J. L. Gaines et al., "An Improved Annular-Shaped Electron Gun for An X-ray Generator", Nuclear Instruments & Methods, 126, (1975), pp. 99-101 (North-Publishing Co.).

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