Control of Ring Magnet Current of the Zero Gradient Synchrotron at Argonne National Laboratory

A comprehensive account is given of the control of the ring magnet current for the 12.5 BeV Zero Gradient Synchrotron (ZGS) at Argonne National Laboratory. Pulsing power is supplied by a motor-generator-flywheel set via four groups of 12-phase rectifiers. The rectifier groups operate alternately as power rectifiers and power inverters as directed by their phase control circuits.