Derived Radial Position and Width Signals from a TV Beam Viewer

We have, at the Zero Gradient Synchrotron (ZGS), a beam viewer which displays in near real time the brightness, width, and position of the beam. This consists basically of a calibrated phosphorescent screen which nondestructively collects ions generated by the circulating beam. A closed circuit TV system transports the signal to the Main Control Room. Circuits were developed which derive analog voltages representative of the beam width and position from the synchronization and video signals. The brightness vs. horizontal position linearity was improved by vidicon model change and a simple shading circuit. A calibrator which simulates a beam was built into the system and is invaluable for initial setup and linearity tests.