TY  - CONF
AU  - Heinze, Leonie
AU  - Xu, J.
AU  - Nyc, Adrian
AU  - Babcock, Earl
AU  - Salhi, Zahir
AU  - Soltner, Helmut
AU  - Pütz, Joachim
AU  - Ortmanns, Torsten
AU  - Schäfer, Roman
AU  - Hanslik, Romuald
AU  - Staringer, Simon
AU  - Thoma, Henrik
AU  - Brandl, Georg
AU  - Luberstetter, W.
AU  - Hutanu, Vladimir
AU  - Mattauch, Stefan
AU  - Zobel, Mirijam
TI  - Polarized Neutron Diffractometer POLI at MLZ: Upgrades and Perspectives
M1  - FZJ-2025-04561
PY  - 2025
AB  - POLI is a hot neutron two-axis diffractometer at the Heinz Maier-Leibnitz Zentrum (MLZ), Germany, which uses spin-polarized neutrons for magnetic studies in particular. The instrument is used, for instance, to study complex crystal and magnetic structures, to reconstruct magnetization densities in the unit cell, and to explore phase diagrams of materials via multiparameter studies. To this end, three standard measurement setups are available on POLI reaching from unpolarized neutron diffraction under extreme sample conditions, over half-polarized diffraction to zero-field spherical neutron polarimetry (SNP). Here, we will present recent developments of the instrument. In 2024, the new in-situ 3He Spin-Exchange Optical Pumping (SEOP) polarizers for POLI were finalized. With the return of neutrons at FRM II, they will provide a high level of constant neutron spin polarization during the polarized neutron diffraction experiments. To fully replace the previous Metastability Exchange Optical Pumping (MEOP) 3He polarizers, a set of two new nutators for the SNP setup are currently in the works, of which we will present the finalized layout as well as first characterization of a prototype nutator.
T2  - International Conference on Neutron Scattering
CY  - 6 Jul 2025 - 10 Jul 2025, Copenhagen (Denmark)
Y2  - 6 Jul 2025 - 10 Jul 2025
M2  - Copenhagen, Denmark
LB  - PUB:(DE-HGF)6
UR  - https://juser.fz-juelich.de/record/1048339
ER  -