Journal Article

IMPULSE-2017-00299

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Application of a portable 3He-based polarization insert at a time-of-flight neutron reflectometer

Kreuzpaintner, W. (Corresponding author)MLZ* ; Masalovich, S.MLZ* ; Moulin, J.-F.MLZ* ; Wiedemann, B.MLZ* ; Ye, J.MLZ* ; Mayr, S.MLZ* ; Paul, A.MLZ* ; Haese, M.MLZ* ; Pomm, M.MLZ* ; Böni, P.MLZ*

2017
North-Holland Publ. Co. Amsterdam

Please use a persistent id in citations: doi:10.1016/j.nima.2016.12.017

Abstract: The suitability of a transportable 3He-spin filter as temporary broadband polarizer for a Time-of-Flight neutron reflectometer is demonstrated. A simple two-wavelength method for characterisation of a 3He-spin filter is proposed, which can be applied even if the absolute transmittance of the 3He-spin filter cannot be accurately determined. We demonstrate the data treatment procedure for extracting the spin-up and spin-down neutron reflectivity from measurements obtained with a time dependent 3He polarization. The extraction of a very weak magnetic signal from reflectivity data, measured on the in-situ grown magnetic heterostructure Fe1nm/Cu20nm/Sisubstrate in an externally applied magnetic field of 30 mT is presented and compared to similar measurements on the growth stage Cu20nm/Sisubstrate of the very same sample, which does not yet contain any magnetic material.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)

---

Contributing Institute(s):

1. E21
2. OPTIC
3. METHODS

Experiment(s):

1. REFSANS: Horizontal TOF Reflectometer with GISANS option (NL2b)
2. Neutron Optics

---

Database coverage:
; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---