OPTIMAL RF SYSTEMS FOR LIGHTLY LOADED SUPERCONDUCTING STRUCTURES

Abstract one meter cavity would therefore need to supply only 300 W to meet these demands. Recent developments in the field of RF accelerators have created a demand for power amplifiers that can support very high accelerating gradients, 15-25 MV/m, in superconducting structures with extremely low losses. Free electron lasers with modest beam current, I<10 uA, or those based on energy recovery linacs may have intrinsic power demands of less than 1 kW/m. We present a design concept for an amplifier and external tuner system that will efficiently meet this requirement. A likely amplifier for this application is the Inductive Output Tube (IOT) which offers high AC/RF efficiency, flexible power output and switching capability without the need for external modulation. The use of solid state amplifiers is also considered. Th