Development of the RF Accelerating System for the GSI Heavy Ion Synchrotron

An extended program has been started to investigate critical components of the RF accelerating system for the planned GSI Heavy Ion Synchrotron. A ferrite testcavity has been developed to measure the properties of ferrite rings under the final operating conditions. An HP 9835 A computer performs on-line control and evaluation of the measurements. The data of the 78 FXC 8C12 ferrite rings delivered for the prototype studies are given. The test-cavity has also been used to develop the closed loop amplitude and phase control circuits for the final accelerating cavities. The prototype accelerating station, comprising the cavity, the RF power system, and all control equipment is expected to come into operation before the end of 1981.