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@INPROCEEDINGS{Clausen:395309,
      author       = {Clausen, Matthias},
      othercontributors = {Boeckmann, Torsten and Branlard, Julien and Eschke, Juergen
                          and Korth, Olaf and Penning, Joerg and Schoeneburg, Bernd},
      title        = {{RF} {H}eat {L}oad {C}ompensation for the {E}uropean
                      {XFEL}},
      school       = {DESY},
      reportid     = {PUBDB-2017-12070},
      year         = {2017},
      abstract     = {The European XFEL is a 3.4km long X-ray Free Elec-tron
                      Laser. The accelerating structure consists of 96 cryo
                      modules running at 1.3 GHz with 10 Hz repetition rate. The
                      injector adds two modules running at 1.3 and 3.9 GHz
                      respectively. The cryo modules are operated at 2 Kelvin.
                      Cold compressors (CCs) pump down the Helium vapour to 30
                      mbar which corresponds to 2 Kelvin. Stable conditions in the
                      cryogenic system are mandatory for successful accelerator
                      operations. Pressure fluctuations at 2 K may cause detuning
                      of cavities and could result in unstable CC operations. The
                      RF losses in the cavities may be compensated by reducing the
                      heater power in the liquid Helium baths of the nine
                      cryogenic strings. This requires a stable readout of the
                      current RF settings. The detailed signals are read out from
                      several severs in the accelerator control system and then
                      computed in the cryogenic control system for heater
                      compensation. This paper will describe the commissioning on
                      the cryogenic control system, the communication between the
                      control systems involved and first results of machine
                      operations with the heat loss compensation in place.},
      month         = {Oct},
      date          = {2017-10-08},
      organization  = {16th International Conference on
                       Accelerator and Large Experimental
                       Physics Control Systems, Barcelona
                       (Spain), 8 Oct 2017 - 13 Oct 2017},
      cin          = {MKS2 / MSK / MKS1},
      cid          = {I:(DE-H253)MKS2-20210408 / I:(DE-H253)MSK-20120731 /
                      I:(DE-H253)MKS1-20210408},
      pnm          = {6G13 - XFEL (POF3-622)},
      pid          = {G:(DE-HGF)POF3-6G13},
      experiment   = {EXP:(DE-H253)XFEL(machine)-20150101},
      typ          = {PUB:(DE-HGF)24},
      doi          = {10.3204/PUBDB-2017-12070},
      url          = {https://bib-pubdb1.desy.de/record/395309},
}