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@INPROCEEDINGS{Deng:859555,
      author       = {Deng, Hao and Hutanu, Vladimir and Sazonov, Andrew and
                      Thoma, Henrik and Luberstetter, Wolfgang and Roth, Georg},
      title        = {{POLI}: {M}ultifunctional {S}ingle {C}rystal
                      {D}iffractometer with {P}olarized {N}eutrons at {MLZ}},
      reportid     = {FZJ-2019-00407},
      year         = {2018},
      abstract     = {POLI is a versatile two axes single crystal diffractometer,
                      mostly dedicated to the investigation of magnetic structures
                      of single crystals using neutron spin polarization.[1]
                      Unlike other short-wavelength polarized neutron
                      diffractometers with Heusler-alloy monochromator for both
                      polarization and monochromatization, POLI employed
                      non-polarized double-focusing monochromators in combination
                      with high-efficiency polarizers. This results in the
                      enhanced intensity of the polarized neutron flux and
                      improved resolution. Also the studies with both polarized
                      and non-polarized neutron diffraction on the same sample
                      under the same conditions (e.g. wavelength, resolution,
                      sample positioning etc.) can be performed. A number of
                      discrete wavelength values from hot (0.29 Å) to near
                      thermal neutrons (1.15 Å) are available by using Cu (220)
                      and Si (311) monochromators on POLI. 3He spin filter cells
                      are used both to produce and to analyze neutron
                      polarization. This polarization technique is especially
                      efficient for the hot neutrons. For the thermal part of the
                      spectrum, a new dedicated supermirror bender polarizer was
                      developed and is under implementation. POLI is very flexible
                      instrument which offers different measuring techniques.
                      Namely: (1) polarize neutron diffraction PND (flipping-ratio
                      measurements) using high magnetic field[2], (2) zero-field
                      spherical neutron polarimetry SNP using the third generation
                      Cryopad[3], and (3) classical single crystal neutron
                      diffraction in extreme environments like high magnetic
                      fields, very low/high temperatures, high voltage, pressure
                      cells etc. and their combinations. Rather high flux of hot
                      polarized neutron makes POLI attractive also for the
                      experiments in nuclear physics [4] and even in medical
                      research.In this report, we will show the design of the
                      whole instrument with the emphasis on the polarization
                      components and extreme environments. Several examples of
                      applications in resolving different challenging aspects in
                      crystal, magnetic and domain structure of complex magnetic
                      materials like multiferroics, superconductors, heavy fermion
                      compounds and frustrated systems will be shown.[1] V. Hutanu
                      , Journal of large-scale research facilities 1,
                      A16.(2015)[2] H. Thoma, W. Luberstetter, J. Peters and V.
                      Hutanu, Journal of Applied Crystallography, 51, 17-26
                      (2018).[3] V. Hutanu, W. Luberstetter, E. Bourgeat-Lami, M.
                      Meven et.al Review of Scientific Instruments 87, 105108
                      (2016)[4] Y. Kopatch et al. EPJ Web of Conferences 169,
                      00010 (2018)},
      month         = {Jul},
      date          = {2018-07-03},
      organization  = {Polarised Neutrons for
                       Condensed-Matter Investigations 2018,
                       Abingdon (England), 3 Jul 2018 - 6 Jul
                       2018},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / JCNS-2 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {524 - Controlling Collective States (POF3-524) / 6212 -
                      Quantum Condensed Matter: Magnetism, Superconductivity
                      (POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
                      Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
                      G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)POLI-HEIDI-20140101},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/859555},
}