Status of the high power, solid-state RF amplifier development at laboratori nazionali di legnaro

The development of high power, unconditionally stable solid-state amplifiers for superconducting low-beta cavities, performed at Laboratori Nazionali di Legnaro in the framework of the EURISOL Design Study and in collaboration with Synchrotron Soleil [1], has led to the construction and testing of two newly designed 10 kW units that can be used both individually or coupled together to obtain a 20 kW source. This family of amplifiers, based on parallel assemblies of 300 W modules equipped with mosfets and individual circulators, gives the possibility of operating in any matching conditions and also, at a reduced power, in case of failure of one mosfet. Characteristics of amplifiers and high power combiner will be described, and their performance and test results will be reported.