Development of digital low-level RF control system using multi-intermediate frequencies

In a superconducting accelerator, an FPGA-based low-level RF system is adopted and a digital feedback control system is utilized to satisfy the requirement of stability in the accelerating field. A digital low-level RF system using multi-intermediate frequencies has been developed and the stability of the feedback operation is estimated using a cavity simulator based on an FPGA board. In this study, the RF system is examined and the results of estimations that are obtained using the cavity simulator are reported.