BPMS FOR THE XFEL CRYO MODULE

The European XFEL is based on superconducting accelerator technology developed in the context of the TESLA collaboration [1]. The accelerator itself consists of cryo modules equipped with 8 acceleration cavities, followed by a quadrupole/steerer package, a BPM and a HOM absorber. This contribution will present the layout of the BPM system for the cryo modules, describing the monitor itself and its integration into the cryo module. Additionally, the electronics concept will be discussed. Finally the results of beam measurements at FLASH using prototypes of the monitor and the electronics will be presented.