PPPS-2013: Abstract submission anode modulation of high power RF output triodes of the ISIS LINAC

摘要

ions since 1984. ISIS has recently replaced the first pair of legacy, low power cathode modulators used on its 2 MW RF triodes with high power, solid-state anode modulators. The key to these new modulators is a series IGBT high voltage switch, rated at up to 40 kV, 300A, built by Diversified Technologies, Inc. This new modulator has eliminated a number of operating difficulties, and yielded significant savings with regard to operational downtime and ∼25% energy consumption. These advantages benefit ISIS by improving reliability and availability, and ensuring RAL's push towards an increased proton beam current above 200 µA can be achieved.