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@ARTICLE{Kujala:454607,
      author       = {Kujala, Naresh and Freund, Wolfgang and Liu, Jia and Koch,
                      Andreas and Falk, Torben and Planas, Marc and Dietrich,
                      Florian and Laksman, Joakim and Maltezopoulos, Theophilos
                      and Risch, Johannes and Dall’Antonia, Fabio and Grünert,
                      Jan},
      title        = {{H}ard x-ray single-shot spectrometer at the {E}uropean
                      {X}-ray {F}ree-{E}lectron {L}aser},
      journal      = {Review of scientific instruments},
      volume       = {91},
      number       = {10},
      issn         = {1089-7623},
      address      = {[S.l.]},
      publisher    = {American Institute of Physics},
      reportid     = {PUBDB-2021-00609},
      pages        = {103101},
      year         = {2020},
      abstract     = {The European X-ray Free-Electron Laser Facility in Germany
                      delivers x-ray pulses with femtosecond pulse duration at a
                      repetition rate of up to 4.5 MHz. The free-electron laser
                      radiation is created by the self-amplified spontaneous
                      emission (SASE) process, whose stochastic nature gives rise
                      to shot-to-shot fluctuations in most beam properties,
                      including spectrum, pulse energy, spatial profile,
                      wavefront, and temporal profile. Each spectrum consisting of
                      many spikes varies in width and amplitude that appear
                      differently within the envelope of the SASE spectrum. In
                      order to measure and study the SASE spectrum, the HIgh
                      REsolution hard X-ray single-shot (HIREX) spectrometer was
                      installed in the photon tunnel of the SASE1 undulator
                      beamline. It is based on diamond gratings, bent crystals as
                      a dispersive element, and a MHz-repetition-rate strip
                      detector. It covers a photon energy range of 3 keV–25 keV
                      and a bandwidth of $0.5\%$ of the SASE beam. The SASE spikes
                      are resolved with 0.15 eV separation using the Si 440
                      reflection, providing a resolving power of 60 000 at a
                      photon energy of 9.3 keV. The measured SASE bandwidth is 25
                      eV. In this paper, we discuss the design specifications,
                      installation, and commissioning of the HIREX spectrometer.
                      The spectral results using Si (110), Si (111), and C (110)
                      crystals are presented.},
      cin          = {DOOR ; HAS-User},
      ddc          = {620},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (POF3-622) / 6G13 - XFEL (POF3-622)},
      pid          = {G:(DE-HGF)POF3-6G3 / G:(DE-HGF)POF3-6G13},
      experiment   = {EXP:(DE-H253)P-P10-20150101 /
                      EXP:(DE-H253)XFEL-SASE1-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:33138553},
      UT           = {WOS:000577161900001},
      doi          = {10.1063/5.0019935},
      url          = {https://bib-pubdb1.desy.de/record/454607},
}