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@ARTICLE{Holm:189121,
      author       = {Holm, Sonja L. and Rasmussen, Nina and Høpfner, Louise and
                      Bertelsen, Mads and Voigt, Jörg and Andersen, Ken H. and
                      Lefmann, Kim},
      title        = {{N}eutron guide-split: {A} high performance guide bundle
                      concept for elliptical guides},
      journal      = {Nuclear instruments $\&$ methods in physics research / A},
      volume       = {782},
      issn         = {0168-9002},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ. Co.},
      reportid     = {FZJ-2015-02334},
      pages        = {1 - 8},
      year         = {2015},
      abstract     = {We present a new guide-split concept for transporting cold
                      and thermal neutrons to multiple instruments from a single
                      beam port at a neutron facility without compromising the
                      useful neutron brilliance notably for any of the
                      instruments.Elliptical guides are capable of transporting an
                      almost completely filled phase space within a large
                      divergence (±2° for cold neutrons). It is therefore
                      possible to place several secondary guides side by side
                      pointing in slightly different directions using the end of a
                      primary guide as a virtual source. The instruments placed at
                      the secondary guides hence exploit different parts of the
                      phase space transported by the primary guide. In addition,
                      the resulting kink between the primary and secondary guide
                      eliminates line of sight.Using ray-tracing simulations of
                      three different set-ups (with two, four, and eight secondary
                      guides) we show that it is possible to illuminate at least
                      eight sample positions from one beam port with a brilliance
                      transfer above $90\%$ on each sample on a 150 m long
                      instrument. This has been done for a phase space volume
                      comprised of an area of 1×1 cm2 and a maximum divergence
                      of±0.5° within a wavelength band of 4.25–5.75 Å. We
                      show, by a full virtual experiment, an example of applying
                      the guide-split concept to an instrument proposed for the
                      European Spallation Source, namely a magnetism
                      diffractometer.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / PGI-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000351065600001},
      doi          = {10.1016/j.nima.2015.01.045},
      url          = {https://juser.fz-juelich.de/record/189121},
}