Design and status of the XFEL RF system

The RF system of the European XFEL under construction at present at DESY in Hamburg,Germany,consists of 27 RE stations. At a later point of time the number might be increased to 31. The RF system provides RF power at 1.3 GHz for the superconducting cavities of the main linear accelerator,the cavities of the injector and the RF gun. Each station consists of a 10 MW multiple beam klystron,a HV pulse modulator,HV pulse cables,a pulse transformer,an interlock system,a low level RF system,a waveguide distribution system and a number of auxiliary power supplies. This paper describes the layout of the RF system and summarizes the design and status of the main high power components.