RF system of ICR proton linac

At the ICR Kyoto University, a 7 MeV proton linac has been operated. Two klystrons are main amplifiers and driver-amplifiers are solid state amplifiers for the linac. It can feed the RF power of 800 kW at the frequency of 433.3 MHz ± 1 MHz. The pulse width is 65 μS and the repetition is 180 Hz. An RF control circuit regulates the phase and the amplitude of the RF field in the accelerator cavity. It consists of an RF interlock, a phase locked loop (PLL) and an auto level controller (ALC). The error of the RF phase is within ±3deg with PLL and the error of the amplitude is ±0.2% with ALC. (author)