Fast Rf Ferrite Phase Shifter for High-power Applications

Fast rf phase shifters may be needed, in powering a superconducting linac, between rf generators and accelerating cavities when one klystron feeds more than one cavity. The configuration with one klystron for many cavities needs orthogonal controls of magnitude and phase of rf power in order to preserve system performance while reducing construction cost. For this reason, a waveguide ferrite phase shifter design was investigated to determine if the desired rf specifications can be satisfied: less than 100 μs response for about 80 degrees of phase shift. Results of the investigation into the rf properties of a waveguide phase shifter design and low-power bench testing are discussed.