H - Electricity – 01 – J
Patent
H - Electricity
01
J
355/15, 358/24
H01J 3/10 (2006.01) G21K 1/08 (2006.01)
Patent
CA 1041228
A PROCESS FOR CENTRING AN IONIZING RADIATION SWEEP BEAM AND DEVICE FOR CARRYING OUT THIS PROCESS Abstract of the Disclosure A centring process for detecting the centring errors of a sweep beam impinging on a target and correcting them, this process comprising comparing a signal VE, corresponding to the difference between electric signals received on the two halves of an electrode, with threshold voltages ? ve and comparing a signal VB, corresponding to the voltage controlling the sweep of the beam, with threshold voltages ? vb, the transmission of a signal Vp corresponding to VE > + ve and VB < - vb (or of a signal vn corresponding to VE< - ve and VB> + vb ) indicating the direction of the centring error and its amplitude. The process permits controlling the centring of a sweep beam on secant axes making an angle .theta. therebetween.
228685
Bourlier Jean N.
Boux Rene
LandOfFree
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