Apparatus and method for inhibiting the generation of excessive

Details Apparatus and method for inhibiting the generation of excessive Apparatus and method for inhibiting the generation of excessive

1989-08-31

1991-04-23

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Source

Electron tube

378126, 378115, 2504923, A61N 510

Patent

active

050105620

ABSTRACT:
The generation of excessive electron radiation or X-ray radiation is prevented in an apparatus which comprises an accelerator means for generating and accelerating electrons. These electrons form an electron beam which has a predetermined low intensity level for the generation of electron radiation or a predetermined high intensity level for the generation of X-ray radiation. In case of generating electron radiation a scattering foil or a target, respectively are arranged in the trajectory of the electron beam. The foil and the target are movably arranged on a support means. Detecting means operable by this support means sense the position of the foil and the target relative to the trajectory of said electron beam and inhibiting means prevent the generation of an electron beam having an intensity level which exceeds the predetermined low intensity level if the target is not positioned and/or which exceeds the predetermined high intensity level if the target is positioned in the trajectory of the electron beam.

REFERENCES:
patent: 4095114 (1978-06-01), Taumann
patent: 4115830 (1978-09-01), Stieber
patent: 4152604 (1979-05-01), Burbury
patent: 4342060 (1982-07-01), Gibson
patent: 4347547 (1982-08-01), Gibson
patent: 4442352 (1984-04-01), Brahme
patent: 4484341 (1984-11-01), Luniewski
patent: 4627089 (1986-12-01), Menor et al.
patent: 4726046 (1988-02-01), Nunan

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