TY - CONF AU - Salhi, Zahir AU - Babcock, Earl AU - Bingöl, Kendal AU - Bussmann, Klaus AU - Kämmerling, Hans AU - Ossovyi, Vladimir AU - Heynen, Achim AU - Deng, Hao AU - Hutanu, Vladimir AU - Masalovich, Sergey AU - Voigt, Jörg AU - Ioffe, Alexander TI - in-situ 3 He SEOP polarizer for Thermal neutrons JO - Journal of physics / Conference Series VL - 1316 IS - 1 SN - 1742-6588 CY - Bristol PB - IOP Publ.87703 M1 - FZJ-2019-06854 SP - 012009 PY - 2019 AB - In this article, we describe a neutron polarizer for a new time-of-flight neutron spectrometer with the polarization analysis TOPAS. This instrument will use the convergent focused incoming beam of thermal neutrons with energies up to 150 meV (wavelength down to 0.74Å). The polarizer employs a high opacity 3He neutron spin filter with continuous 3He polarization provided by two laser array bars frequency narrowed by an ultra-compact volume Bragg grating. The system was successfully prototyped, and tested. In the course of first experimental test at the polarized hot neutron diffractometer POLI at MLZ, neutron polarization of 97.6% was achieved for 0.895Å neutrons and kept constant during 30 days. T2 - 12th International Conference on Polarised Neutrons for Condensed Matter Investigations CY - 3 Jul 2018 - 6 Jul 2018, Abingdon, UK (UK) Y2 - 3 Jul 2018 - 6 Jul 2018 M2 - Abingdon, UK, UK LB - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8 UR - <Go to ISI:>//WOS:000562316600009 DO - DOI:10.1088/1742-6596/1316/1/012009 UR - https://juser.fz-juelich.de/record/868304 ER -