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@INPROCEEDINGS{Rcker:1005510,
      author       = {Rücker, Ulrich},
      title        = {{T}hermal moderator-reflector assembly for {HBS}},
      reportid     = {FZJ-2023-01510},
      year         = {2023},
      abstract     = {The thermal moderator is the key component in a research
                      neutron source to convert the primary neutrons which
                      typically haveenergies in the MeV regime into useful
                      neutrons for investigations that shall have energies well
                      below 1 eV. In the case of aHiCANS as HBS, the thermal
                      moderator has to be optimized according to the compact
                      target size and to the proton pulse lengthsat the different
                      target stations. Extraction channels in the thermal
                      moderator are used to either place cold sources
                      feedinginstruments that need a cold neutron spectrum or to
                      extract thermal neutron beams from the volume of highest
                      thermal neutronflux density. Requirements of restricted
                      space, neutron transparency of the main structural
                      materials, the technically demandingflowing liquid thermal
                      moderator material, the complex nature of intense thermal
                      and induced mechanical loading,industry-standard
                      requirements for operational safety, etc. impose important
                      boundary conditions on the design of the thermalmoderator.
                      Here, we present the details of a thermal moderator design
                      serving up to 12 instruments at a target station operated
                      at96 Hz. The thermal moderator consists of a combined welded
                      complex-profiled Al vessel containing 12 thin-walled cast
                      extractionchannels arranged in 2 levels. The vessel is
                      filled with H2O as moderator material which is pumped for
                      cooling purposes. Theentire system is surrounded by a lead
                      reflector and arranged on top of the compact Ta target. We
                      show the results of simulationsconcerning the neutronics and
                      the thermal behaviour of this thermal moderator-reflector
                      assembly. This work is part of thecollaboration within ELENA
                      and LENS on the development of HiCANS.},
      month         = {Mar},
      date          = {2023-03-19},
      organization  = {Micro Symposium CANS 2 im Rahmen der
                       ECNS-Konferenz (19. - 23.03.2023), TUM
                       Department of Mechanical Engineering
                       and the new Science Congress Center
                       Munich (Germany), 19 Mar 2023 - 23 Mar
                       2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JCNS-HBS / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      I:(DE-Juel1)JCNS-HBS-20180709 / $I:(DE-82)080009_20140620$},
      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/1005510},
}