System for monitoring the position, intensity, uniformity...

Details System for monitoring the position, intensity, uniformity... System for monitoring the position, intensity, uniformity...

G - Physics

01

T

358/34

G01T 1/29 (2006.01) H01J 37/244 (2006.01) H01J 37/304 (2006.01)

Patent

CA 1067624

A SYSTEM FOR MONITORING THE POSITION, INTENSITY, UNIFORMITY AND DIRECTIVITY OF A BEAM OF IONIZING RADIATION. Abstract of the Disclosure A monitoring system transparent to ionizing radiation, designed for measuring the position, intensity, uniformity and directivity of a radiation beam, this monitoring system comprising, in one embodiment, three superimposed ionization chambers respectively provided with three electrodes, one of which ionization chambers being equipped with an elec- trode whose area is smaller than the areas of the two other electrodes,such last areas being substantially equal to the cross-sectional area of the radiation beam. Circuits for processing the signals furnished by the different electrodes are associated with comparators and with a safety system making it possible to stop the beam source in the event that "threshold" values are exceeded, or to control said beam.

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