| Irfu-10-100
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| Status of the re-entrant cavity beam position monitor for the XFEL project |
| C. Simon, O. Napoly, J.P. Prestel, N. Rouvière |
| The European XFEL is a research facility, currently under construction in Germany. It is based on a superconducting electron linac including about 100 cryomodules based on the TESLA technology. Each cryomodule is equipped with a beam position monitor connected to a quadrupole at the high-energy end of the cavity string. Around one third of cold BPMs will be re-entrant RF cavities. This contribution describes the present status of the cold re-entrant cavity BPM and presents the measurements performed with BPM pickup and electronics prototypes. |
