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@INPROCEEDINGS{Rcker:1044176,
      author       = {Rücker, U. and Eisenhut, S. and Hannot, M. and Rosenthal,
                      E. and Suxdorf, F. and Schwab, A. and Baggemann, Johannes
                      and Paulin, M. and Maharaj, D. and Zakalek, P. and
                      Gutberlet, T.},
      title        = {{O}peration experience of {W}orld's first 1-dimensional
                      para-hydrogen moderator},
      reportid     = {FZJ-2025-03065},
      year         = {2025},
      abstract     = {In the framework of the development of the HBS HiCANS
                      project in Jülich, the World's first 1-dimensional
                      cryogenic moderator based on liquid para-hydrogen has been
                      designed, constructed and tested. Para-hydrogen is a special
                      form of hydrogen as the mean free paths for thermal and cold
                      neutrons differ by about 1 order of magnitude. This makes it
                      possible to develop a 1-dimensional cold moderator where the
                      extraction happens along the extended dimension while the
                      feeding with thermal neutrons is done along the other two
                      dimensions, which are small in comparison.The moderator
                      cryostat was designed such that the hydrogen volume is
                      completely enclosed and where hydrogen serves as coolant as
                      well as moderator material. The heat is removed by a
                      closed-cycle cryocooler outside the target-moderator
                      shielding and the hydrogen is circulated by a pump for
                      cryogenic fluids. This system has been built to fit into a
                      beamport plug of the JULIC Neutron Platform, the technology
                      demonstrator of the HBS project in Jülich. The system
                      successfully was brought into operation and we measured the
                      neutron spectrum emitted from this cold source. Finally, the
                      measurements and simulations of the neutron moderation were
                      compared to assess the reliability of the simulation tools
                      to be able to describe future moderator setups properly.},
      month         = {Jul},
      date          = {2025-07-06},
      organization  = {The International Conference on
                       Neutron Scattering, Bella Center in
                       Copenhagen, Denmark, with the last day
                       at the European Spallation Source (ESS)
                       in nearby Lund, Sweden (Denmark), 6 Jul
                       2025 - 10 Jul 2025},
      subtyp        = {Invited},
      cin          = {JCNS-2 / JCNS-HBS / JARA-FIT / ITE / JCNS-1},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)JCNS-HBS-20180709
                      / $I:(DE-82)080009_20140620$ / I:(DE-Juel1)ITE-20250108 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1044176},
}