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@ARTICLE{Frielinghaus:5632,
      author       = {Frielinghaus, H. and Pipich, V. and Radulescu, A. and
                      Heiderich, M. and Hanslik, R. and Dahlhoff, K. and Iwase, H.
                      and Koizumi, S. and Schwahn, D.},
      title        = {{A}spherical refractive lenses for small angle neutron
                      scattering},
      journal      = {Journal of applied crystallography},
      volume       = {42},
      issn         = {0021-8898},
      address      = {Copenhagen},
      publisher    = {Munksgaard},
      reportid     = {PreJuSER-5632},
      pages        = {681 - 690},
      year         = {2009},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Aspherical neutron lenses are discussed in detail as
                      focusing elements for existing small-angle neutron
                      scattering (SANS) diffractometers. The conceptual design can
                      be obtained by analytical equations, while computer
                      simulations provide the intensity distribution of the
                      primary beam, which is strongly correlated with the
                      instrumental resolution and the minimal momentum transfer Q.
                      For large illuminated sample/lens areas of 50 mm diameter
                      the aspherical lens design is essential, while spherical
                      lenses are limited to ca 20 mm diameter with a $60\%$
                      spherical aberration for standard SANS experiments.
                      Scattering experiments on different samples proved the
                      applicability and revealed the resolution limits of the two
                      lens types. From theoretical considerations it is proposed
                      that lens cooling can be used to reduce the thermal diffuse
                      scattering.},
      keywords     = {J (WoSType)},
      cin          = {IFF-5 / IFF-4 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS / ZAT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB785 / I:(DE-Juel1)VDB784 /
                      I:(DE-Juel1)JCNS-20121112 / I:(DE-Juel1)ZAT-20090406},
      pnm          = {Kondensierte Materie / Großgeräte für die Forschung mit
                      Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK414 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      shelfmark    = {Crystallography},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000268068000016},
      doi          = {10.1107/S0021889809017919},
      url          = {https://juser.fz-juelich.de/record/5632},
}