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@INPROCEEDINGS{Napieralski:292496,
      author       = {Napieralski, A. and Branlard, J. and Schmidt, Ch. and
                      Cichalewskki, W.},
      title        = {{E}uropean {XFEL} {C}avities {P}iezoelectric {T}uners
                      {C}ontrol {R}ange {O}ptimization},
      reportid     = {PUBDB-2015-06146},
      isbn         = {978-3-95450-148-9},
      pages        = {1-4},
      year         = {2015},
      note         = {ARD Subtopic (RF Acc. Technology) ergänzen.Pre-Press
                      Release},
      abstract     = {The piezo based control of the superconducting cavity
                      tuning has been under the development over last years.
                      Automated compensation of Lorentz force detuning of FLASH
                      and European X-FEL resonators allowed to maintain cavities
                      in resonance operation even for high acceleration gradients
                      (in range of 30 MV/m). It should be emphasized that cavity
                      resonance control consists of two independent subsystems.
                      First of all the slow motor tuner based system can be used
                      for slow, wide range mechanical tuning (range of hundreds of
                      kHz). Additionally the piezo tuning system allows for fine,
                      dynamic compensation in a range of ~1 kHz. In mentioned
                      pulse mode experiments (like FLASH), the piezo regulation
                      budget should be preserved for in-pulse detuning control. In
                      order to maintain optimal cavity frequency adjustment
                      capabilities slow motor tuners should automatically act on
                      the static detuning component at the same time. This paper
                      presents work concerning development, implementation and
                      evaluation of automatic superconducting cavity frequency
                      control towards piezo range optimization. FLASH and X-FEL
                      dedicated cavities tuning control experiences are also
                      summarized.},
      month         = {Oct},
      date          = {2015-10-17},
      organization  = {15th International Conference on
                       Accelerator and Large Experimental
                       Physics Control Systems, Melbourne
                       (Australia), 17 Oct 2015 - 23 Oct 2015},
      cin          = {MSK},
      cid          = {I:(DE-H253)MSK-20120731},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631)},
      pid          = {G:(DE-HGF)POF3-631},
      experiment   = {EXP:(DE-H253)XFEL(machine)-20150101 /
                      EXP:(DE-H253)FLASH(machine)-20150101},
      typ          = {PUB:(DE-HGF)8},
      url          = {https://bib-pubdb1.desy.de/record/292496},
}