An RF System for a Compact Synchrotron

The Indiana University Cooler Injection Synchrotron (CIS) is a 17.4 m circumference compact synchrotron designed to accelerate protons to 200 MeV. Its RF system design features a compact ferrite tunable cavity with wideband impedance matching, phase and radial beam control loops based on digital signal processing (DSP) and direct digital rf synthesis (DDS) technologies, and simple interface with the main control and timing system. The overall digital approach to the rf beam feedback system and the efficiency of the ferrite tuned rf cavity contribute greatly to the design objective of low cost, high stability and easy maintenance for a compact synchrotron.