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@INPROCEEDINGS{Janas:171858,
      author       = {Janas, Ewa and Kownacki, Przemyslaw and Czwalinna, Marie
                      Kristin and Felber, Matthias and Lamb, Thorsten and Schlarb,
                      Holger and Schulz, Sebastian and Sydlo, Cezary and
                      Titberidze, Mikheil and Zummack, Falco and Czuba, Krzysztof
                      and Sikora, Dominik and Szewinski, Jaroslaw},
      title        = {{D}esign and {I}ntegration of the {O}ptical {R}eference
                      {M}odule at 1.3 {GH}z for {FLASH} and the {E}uropean {XFEL}},
      address      = {Geneva},
      publisher    = {JACoW, Geneva, Switzerland},
      reportid     = {DESY-2014-03399},
      isbn         = {978-3-95450-132-8},
      pages        = {2768-2770},
      year         = {2014},
      comment      = {Proceedings of the 5th Int. Particle Accelerator Conf.,
                      IPAC2014, Dresden, Germany},
      booktitle     = {Proceedings of the 5th Int. Particle
                       Accelerator Conf., IPAC2014, Dresden,
                       Germany},
      abstract     = {In this paper we present recent progress on the integration
                      and implementation of the optical reference module
                      (REFM-OPT) for the free-electron lasers FLASH and European
                      XFEL. In order to achieve high energy stability and low
                      arrival time jitter of the electron beam, the accelerator
                      requires an accurate low-level RF (LLRF) field regulation
                      and a sophisticated synchronization scheme for various
                      devices along the facility. The REFM-OPT is a 19” module
                      which is responsible for resynchronizing the 1.3 GHz
                      reference signal for the LLRF distributed by coaxial cables
                      to a phase-stable signal of the optical synchronization
                      system. The module provides a 1.3 GHz output signal with low
                      phase noise and high long-term stability. Several
                      sub-components of the REFM-OPT designed specifically for
                      this module are described in detail. The readout electronics
                      of the high-precision Laser-to-RF phase detector are
                      presented as well as the integration of this key component
                      into the 19” module. Additionally, we focus on design
                      solutions which assure phase stability and synchronization
                      of the 1.3 GHz signal at several high power outputs of the
                      module.},
      month         = {Jun},
      date          = {2014-06-15},
      organization  = {5th International Particle Accelerator
                       Conference, Dresden (Germany), 15 Jun
                       2014 - 20 Jun 2014},
      keywords     = {Accelerator Physics (Other) / 07 Accelerator Technology
                      Main Systems (Other) / T24 Timing and Synchronization
                      (Other)},
      cin          = {MSK / MPSD},
      cid          = {I:(DE-H253)MSK-20120731 / I:(DE-H253)MPSD-20120731},
      pnm          = {Facility (machine) FLASH (POF2-FLASH-20130405) / Facility
                      (machine) XFEL (POF2-XFEL-20130405)},
      pid          = {G:(DE-H253)POF2-FLASH-20130405 /
                      G:(DE-H253)POF2-XFEL-20130405},
      experiment   = {EXP:(DE-H253)FLASH(machine)-20150101 /
                      EXP:(DE-H253)XFEL(machine)-20150101},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.18429/JACoW-IPAC2014-WEPRI115},
      url          = {https://bib-pubdb1.desy.de/record/171858},
}