Compensated electron beam deflection device

摘要

An electron beam deflection amplifier having two spaced parallel electron beams and a pair of spaced collector electrodes for intercepting the beams to provide an output beam current. The beams are deflected in opposite directions by the input signal to be amplified but are deflected in the same direction by external undesired stray fields. The collector electrodes are dimensioned and relatively positioned such that variable portions of both beams will be collected at both electrodes. Each collector electrode will intercept a portion of each beam and the portion of each beam not intercepted by one collector electrode will be intercepted by the other collector electrode. For desired input signals, the collector current outputs are additive. A stray magnetic field will deflect the electron beams in the same direction in which case the output current due to one beam substracts and cancels the output current from the other beam. In this manner the effect of external fields are compensated for and nullified.