A solid state opening switch and mod anode supply for the advanced light source klystrons

Series opening switches have substantial advantages over crowbars in protecting RF amplifiers such as klystrons, TWTs, and gyrotrons. Diversified Technologies, Inc. has developed and delivered many solid-state opening switches using series arrays of insulated-gate bipolar transistors (IGBTs). The opening switch described here is part of a complete klystron power-supply system for the Advanced Photon Source (APS) at Argonne National Laboratory.