• B. Keil, R. Baldinger, R. Ditter, R. Kramert, G. Marinkovic, P. Pollet, M. Roggli, M. Rohrer, V. Schlott, M. Stadler, D.M. Treyer
  PSI, Villigen
• W. Decking, D. Lipka, D. Nölle, M. Siemens, T. Traber, S. Vilcins
  DESY, Hamburg
• O. Napoly, C.S. Simon
  CEA, Gif-sur-Yvette
• J.-P. Prestel, N. Rouvière
  IPN, Orsay

The Eu­ro­pean XFEL is an X-ray free elec­tron laser user fa­cil­i­ty that is cur­rent­ly being built in Ham­burg by an in­ter­na­tion­al con­sor­tium. The elec­tron BPM sys­tem of the XFEL is de­vel­oped by a col­lab­o­ra­tion of PSI, DESY, and CEA/Saclay/Irfu. Cav­i­ty BPMs will be used in all parts of the E-XFEL where high­est res­o­lu­tion and low­est drift is re­quired, e.g. in the un­du­la­tors and some lo­ca­tions in the beam trans­fer lines. In the cryostats of the su­per­con­duct­ing 17.5GeV main linac, 2/3rds of the BPMs will be but­tons, while 1/3rd will be re-en­trant cav­i­ties that promise high­er res­o­lu­tion than but­tons at low bunch charges. The trans­fer lines will also be equipped with cost-ef­fi­cient but­ton BPMs. The BPM elec­tron­ics is based on a mod­u­lar sys­tem con­cept, with a com­mon FP­GA-based dig­i­tal back-end de­sign for all BPMs and pick­up-spe­cif­ic ana­log RF front-ends. This paper in­tro­duces the de­sign con­cepts and re­ports on the pro­ject sta­tus and mea­sure­ment re­sults of BPM pick­up and elec­tron­ics pro­to­types.