Journal Article/Contribution to a conference proceedings

FZJ-2019-06854

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png in-situ 3 He SEOP polarizer for Thermal neutrons

Salhi, Z. (Corresponding author)FZJ* ; Babcock, E.FZJ* ; Bingöl, K.FZJ* ; Bussmann, K.FZJ* ; Kämmerling, H.FZJ* ; Ossovyi, V.FZJ* ; Heynen, A.FZJ* ; Deng, H. ; Hutanu, V.FZJ* ; Masalovich, S. ; Voigt, J.FZJ* ; Ioffe, A.FZJ*

2019
IOP Publ.87703 Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/23767  doi:10.1088/1742-6596/1316/1/012009

Abstract: 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.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd) ; Condensed Matter Physics (2nd) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Streumethoden (JCNS-2)
3. Zentralinstitut für Technologie (ZEA-1)
4. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 524 - Controlling Collective States (POF3-524) (POF3-524)
2. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
3. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
4. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. POLI: Polarized hot neutron diffractometer (SR9a)
2. TOPAS: Thermal time-of-flight spectrometer with polarization analysis (SR5m)

Appears in the scientific report 2019

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Database coverage:
; ; ; SCOPUS

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