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@ARTICLE{Zhou:902672,
      author       = {Zhou, Yong and Xu, Huagen and Bechstedt, Ulf and Böker,
                      Jürgen and Demary, Nils and Goldenbaum, Frank and Grzonka,
                      Dieter and Hetzel, Jan and Khoukaz, Alfons and Klehr, Franz
                      and Krings, Thomas and Lessmann, Lukas and Mannweiler,
                      Christian and Prasuhn, Dieter and Quilitzsch, Steffen and
                      Ritman, James and Schadmand, Susan and Sefzick, Thomas and
                      Stassen, Rolf and Wüstner, Peter},
      title        = {{T}he {KOALA} experiment for (anti)proton–proton elastic
                      scattering},
      journal      = {Nuclear instruments $\&$ methods in physics research / A},
      volume       = {1019},
      issn         = {0168-9002},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ. Co.},
      reportid     = {FZJ-2021-04459},
      pages        = {165849 -},
      year         = {2021},
      abstract     = {The KOALA experiment measures the differential cross
                      section of (anti)proton–proton elastic scattering over a
                      wide range of four-momentum transfer squared from 0.0008 to
                      0.1 (GeV/c)2. These data are essential input for the PANDA
                      experiment to reach the desired absolute precision for the
                      integrated luminosity determination. The KOALA experiment is
                      based on fixed target kinematics and uses an internal
                      hydrogen cluster jet target. The wide range of is achieved
                      by measuring the total kinetic energy of the recoil protons
                      near 90. The recoil detector consists of silicon and
                      germanium single-sided strip sensors with an energy
                      resolution of approximately 20 keV and 30 keV (FWHM),
                      respectively. A forward detector consisting of two layers of
                      plastic scintillators measures the elastically scattered
                      beam particles in the forward direction close to the beam
                      axis. By requiring a coincidence of the forward detector
                      with the recoil detector, the large background at small
                      recoil angles is suppressed, thereby improving the
                      identification of elastic scattering events in the low
                      range. The KOALA setup has been installed and commissioned
                      with proton beam at COSY in order to validate the detector
                      by measuring the proton–proton elastic scattering. The
                      results from this commissioning are presented here.},
      cin          = {IKP-1 / IKP-4 / IKP-TA / ZEA-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104 / I:(DE-Juel1)IKP-4-20111104 /
                      I:(DE-Juel1)IKP-TA-20111104 / I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {6G12 - FAIR (GSI) (POF4-6G12) / 612 - Cosmic Matter in the
                      Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-6G12 / G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000706968400001},
      doi          = {10.1016/j.nima.2021.165849},
      url          = {https://juser.fz-juelich.de/record/902672},
}