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@ARTICLE{Rauer:482988,
      author       = {Rauer, Patrick and Bahns, Immo and Brueggmann, Ulf and
                      Casalbuoni, Sara and Decking, Winfried and Di Felice,
                      Massimiliano and Dommach, Martin and Gruenert, Jan and
                      Hillert, Wolfgang and Karabekyan, Suren and Koch, Andreas
                      and La Civita, Daniele and Lipka, Dirk and Rio, Benoit and
                      Rossbach, Joerg and Samoylova, Liubov and Sinn, Harald and
                      Thoden, Daniel and Wohlenberg, Torsten and Vannoni, Maurizio
                      and Youngman, Christopher},
      title        = {{C}avity {B}ased {X}-{R}ay {F}ree {E}lectron {L}aser
                      {D}emonstrator at the {E}uropean {X}-ray {F}ree {E}lectron
                      {L}aser {F}acility},
      journal      = {Physical review accelerators and beams},
      volume       = {26},
      number       = {2},
      issn         = {1098-4402},
      address      = {College Park, MD},
      publisher    = {American Physical Society},
      reportid     = {PUBDB-2022-05060},
      pages        = {020701, 14 pages},
      year         = {2023},
      note         = {Creative Commons Attribution 4.0 International copyright
                      license.},
      abstract     = {In this article, the concept of a recently funded $R\&D$
                      project for the installation of a proof-of-concept
                      cavity-based x-ray free electron laser (CBXFEL) demonstrator
                      experiment at the European XFEL facility is presented, with
                      the first results expected in 2024. It is composed of an
                      x-ray cavity design in backscattering geometry with a 133 m
                      round trip length using cryogenically cooled diamond
                      crystals. It employs the concept of retroreflection to
                      reduce the sensitivity to vibrations. The FEL radiation is
                      produced in four undulator segments of 20 m total length.
                      Simulations at 16 GeV beam energy and 250 pC bunch charge
                      show that the expected x-ray pulses in saturation surpass
                      state-of-the-art x-ray sources considering spectralflux and
                      three-dimensional coherence. However, the stability of the
                      proof of concept setup is severely challenged by the finite
                      thermal transport in the diamond crystals. Therefore,
                      suitable measures such as cooling the crystals to 70 K are
                      explained in this paper and additional ones will have to be
                      developed in the course of this project.},
      cin          = {$XFEL_DO_XO$ / MXL / UNI/EXP / $XFEL_DO_ID_XPD$ / MDI /
                      $XFEL_DO_ID_ME$ / $XFEL_DO_ID_VAC$ / MVS / $XFEL_DO_ID_UND$
                      / $XFEL_DO_DD_EEE$},
      ddc          = {530},
      cid          = {$I:(DE-H253)XFEL_DO_XO-20210408$ / I:(DE-H253)MXL-20160301
                      / $I:(DE-H253)UNI_EXP-20120731$ /
                      $I:(DE-H253)XFEL_DO_ID_XPD-20210408$ /
                      I:(DE-H253)MDI-20120806 /
                      $I:(DE-H253)XFEL_DO_ID_ME-20211118$ /
                      $I:(DE-H253)XFEL_DO_ID_VAC-20210408$ /
                      I:(DE-H253)MVS-20120731 /
                      $I:(DE-H253)XFEL_DO_ID_UND-20210408$ /
                      $I:(DE-H253)XFEL_DO_DD_EEE-20210408$},
      pnm          = {621 - Accelerator Research and Development (POF4-621) /
                      6G13 - Accelerator of European XFEL (POF4-6G13)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-HGF)POF4-6G13},
      experiment   = {EXP:(DE-H253)XFEL(machine)-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000937138600002},
      doi          = {10.1103/PhysRevAccelBeams.26.020701},
      url          = {https://bib-pubdb1.desy.de/record/482988},
}