An RF system for a compact synchrotron

A 17.4 m circumference 200 MeV proton synchrotron, the Cooler Injector Synchrotron (CIS), is being commissioned at the Indiana University Cyclotron Facility. The compact synchrotron will be used as the injector for the electron-cooled IUCF Cooler Synchrotron. The RF system design uses digital signal processing (DSP) to directly modulate a digital RF synthesizer for beam feedback control. A wide band tunable RF cavity uses non-uniform ferrite biasing to achieve a 10:1 frequency coverage with good VSWR performance and low power requirement.