Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1978-11-28
1980-06-03
Anderson, Bruce C.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250374, G01T 118
Patent
active
042063558
ABSTRACT:
A monitoring system transparent to ionizing radiation, designed for measuring the position, intensity, uniformity and directivity of a radiation beam, comprises two or three superimposed ionization chambers respectively provided with respective disk electrodes. One electrode is of smaller area than the other electrode or electrodes, the latter 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 which readjusts the beam or deactivates the radiation source in the event that certain "threshold" values are exceeded, indicating a deviation of the beam from a centered position.
REFERENCES:
patent: 2566684 (1951-09-01), Tobias
patent: 2825816 (1958-03-01), Rogers
patent: 3254220 (1966-05-01), Madex
patent: 3808441 (1974-04-01), Boux
patent: 3836780 (1974-09-01), Amqvist et al.
patent: 3845310 (1974-10-01), Perraudin
patent: 3898466 (1975-08-01), Kawashima
patent: 3942012 (1976-03-01), Boux
"C.G.R. MeV"
Anderson Bruce C.
Ross Karl F.
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