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@INPROCEEDINGS{Eich:894214,
      author       = {Eich, Andreas and Friese, Karen and Hölzle, Micha and Su,
                      Yixi and Müller, Thomas and Hutanu, Vladimir and Poli, Muni
                      Kishore Babu and Georgii, Robert and Beddrich, Lukas and
                      Meven, Martin and Grzechnik, Andrzej},
      title        = {{D}evelopment of a high pressure option for neutron
                      scattering experiments at low temperatures and high magnetic
                      fields at the {MLZ}},
      reportid     = {FZJ-2021-03103},
      year         = {2021},
      abstract     = {To study the effect of high pressure on any sample
                      property, suitable pressure devices are a fundamental
                      requirement. Their design has to be tailored to the
                      experimental demands regarding the intended pressure, the
                      employed instrumentation and the expected scientific
                      results. Our work presents the development of high pressure
                      cells for neutron scattering on polycrystalline and
                      single-crystalline samples at low temperatures and with
                      applied magnetic fields.One of the most common devices for
                      high-pressure neutron experiments is the clamp cell [1],
                      where the pressure is applied ex situ and which can be used
                      independently in various setups. Our cell design [2] has
                      been specifically developed for neutron scattering
                      experiments at low temperatures in the closed-cycle
                      cryostats on the instruments DNS (diffuse scattering neutron
                      spectrometer), MIRA (cold three axes spectrometer), and POLI
                      (polarized hot neutron diffractometer) at the Heinz
                      Maier-Leibnitz Zentrum (MLZ) in Garching, Germany. Two
                      variants of the compact monobloc cell (Fig. 1) were
                      produced, one from CuBe alloy and from NiCrAl “Russian
                      Alloy”, working up to about 1.1 GPa and 1.5 GPa,
                      respectively. The low paramagnetic moment of both alloys
                      allows also measurements of magnetic properties.First tests
                      of the cell with neutron radiation were performed to
                      calibrate the load/pressure-curve of the CuBe cell (up to
                      1.15 GPa) (at POLI), to estimate its neutron absorption and
                      background (at MIRA), and to measure magnetic reflections
                      (at MIRA). In addition, the thermal response in the cryostat
                      of DNS was measured, and the experimental findings were
                      complemented by simulations.Ultimately, these cells are
                      intended as standard cells for high pressure measurements on
                      different instruments at MLZ suitable for all available
                      magnets and cryostats down to 1.5 K. Further tests under
                      various conditions (temperature, pressure, magnetic field)
                      as well as simulations are planned for both cells in the
                      near future. The results will help both to establish the
                      present cells and to optimise the design of subsequent cells
                      to achieve higher pressures, to fit into smaller cryostats
                      and to enable neutron-independent pressure calibration.},
      month         = {Aug},
      date          = {2021-08-14},
      organization  = {Twenty-Fifth Congress and General
                       Assembly of the International Union of
                       Crystallography, Prague Congress Centre
                       (Czech Republic), 14 Aug 2021 - 22 Aug
                       2021},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-FRM-II},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      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},
      experiment   = {EXP:(DE-MLZ)DNS-20140101 / EXP:(DE-MLZ)POLI-HEIDI-20140101
                      / EXP:(DE-MLZ)MIRA-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/894214},
}