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@INPROCEEDINGS{Hutanu:897117,
      author       = {Hutanu, Vladimir and Thoma, Henrik and Angst, Manuel and
                      Roth, Georg},
      title        = {{N}ew polarized neutron diffraction setup with 8 {T} magnet
                      on {POLI}},
      reportid     = {FZJ-2021-03615},
      year         = {2020},
      abstract     = {The polarized single-crystal diffractometer POLI offers two
                      types of polarized neutron diffraction experiments:spherical
                      neutron polarimetry (SNP), also known as full
                      three-dimensional polarization analysis in zero mag-netic
                      field, and classical polarized neutron diffraction, also
                      called flipping-ratio (FR) method, in high appliedmagnetic
                      fields. Recently, the available sample environment of POLI
                      has been extended by an asymmetric fieldmagnet of 8 T.
                      Although this new magnet is actively shielded, its stray
                      fields are still too large to be used withthe sensitive 3He
                      polarizer of the original SNP setup. To overcome this issue,
                      a new, large-beam-cross-sectionsolid-state supermirror (SM)
                      bender polarizer has been developed for POLI. An existing
                      shielded Mezei-typeflipper is used between the magnet and SM
                      polarizer. A dedicated guide field construction was
                      numericallysimulated, optimized and built to link the
                      magnetic field of the polarizer to the flipper and to the
                      stray field ofthe magnet. An almost loss-free spin transport
                      within the instrument in the complete field range of the
                      newmagnet was achieved. The new setup was successfully
                      implemented and tested. A high polarization efficiencyof
                      above $99\%$ for short wavelength neutrons could be
                      experimentally reached with the new solid-state bender.The
                      new high–field FR setup is now available for POLI’s user
                      community.},
      month         = {Dec},
      date          = {2020-12-08},
      organization  = {MLZ User Meeting $\&$ German Neutron
                       Scattering Conference 2020, online
                       event (Germany), 8 Dec 2020 - 10 Dec
                       2020},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / JARA-FIT / JCNS-2 / JCNS-4 / MLZ},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)JCNS-4-20201012 / I:(DE-588b)4597118-3},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)POLI-HEIDI-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/897117},
}