High Efficiency, Low Cost, RF Sources for Accelerators and Colliders

Several high efficiency, low cost, RF sources are in development or recently completed. All are designed to provide operating efficiencies exceeding 80% and provide more than 100 kW of output power with a focus on high average power or CW operation. The sources include (1) a magnetron system with amplitude and phase control, a multiple beam, power grid-tube based source, a multiple beam inductive output tube, and a klystron using the core oscillation method. The estimated cost for the magnetron system and multiple beam power grid-tube source are one dollar per Watt and 75 cents per Watt, respectively. Operating frequencies span the range from 300 MHz (power grid tube) to 1.3 GHz (magnetron and klystron). This paper describes the basic operation of the sources, indicates the status and schedule, and provides available experimental results.