Periodic permanent magnet focusing in single and multiple beam klystrons

Calabazas Creek Research is developing several, high power, periodic permanent magnet (PPM) focused klystrons. PPM focusing offers reduced power consumption and low weight. We report on the design and testing of an S-band, pulsed klystron capable of providing 5 MW power for advanced medical and industrial accelerators, and on the design of the gun and magnetic structure for a PPM-focused, multiple beam klystron with a beam power of 320 kW CW.