Variable High Power RF Splitter and RF Phase Shifter for CLIC

During the routine operation of CLIC a way has to be found to divert RF power from a single accelerating structure that is continuously breaking down. One way to do this is to use a device, which re-directs or splits the RF power between the structure and the RF load. An extensive development programme of such devices is under way at SLAC [1], however, there is no reliable device available to date which can handle a few hundred MW at the CLIC high frequency of 30 GHz. Ultra-fast switching times are not required for CLIC, it is sufficient that the power be diverted. The device however should be extremely reliable. A novel design of a mechanically  driven high-power RF splitter/divider and RF phase shifter that satisfies the CLIC requirements is presented.