Design and results of a 1.3 MW CW klystron for LEP

The development of a high power CW klystron prototype delivering 1.3 MW at 352 MHz is presented. The design was carried out using CAE/CAD tools. Particular attention was given to design optimizations with regard to the modulating anode electron gun, the focusing system and the RF region for a wide range of operating conditions typical for accelerator applications. Two new technological features were introduced, a PHILIPS low temperature cathode for long life stable operation and a multipactor suppression coating on the RF output window. Test and operational results is included in the presentation.<
>