Apparatus and method for inhibiting the generation of excessive radiation
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
Aug 31, 1989
filing date -
Aug 31, 1989
priority date (Note) -
Expired
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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.
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