Neutron multimonochromator-bipolarizer based on magnetic multilayer Fe/Co and new scheme for the total neutron polarization analysis

International Conference on Polarised Neutrons for Condensed Matter Investigations

Syromyatnikov, V.G.^1,2 ; Zaw Lin, Kyaw^1

Department of Physics, St. Petersburg State University, Ulyanovskaya, 1, Petrodvorets-St-Petersburg

198504, Russia^1

Neutron Research Department, Petersburg Nuclear Physics Institute, National Research Center, Kurchatov Institute, Orlova Roscha, Gatchina, St-Petersburg

188300, Russia^2

关键词: Magnetic nanostructures;    Neutron polarization analysis;    Periodic multilayers;    Polarized neutron reflectometry;    Polarized neutrons;    Reflectometry;    Spin flipper;    Time of Flight methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/862/1/012016/pdf
DOI  :  10.1088/1742-6596/862/1/012016

来源: IOP

【 摘 要 】

In this paper, we present a new neutron-optical element, Neutron Multimonochromator-Bipolarizer (NMB). It consists of a multimultilayer structure made of 12 periodic multilayer Fe/Co magnetic nanostructures whose period increases with distance from the substrate. Results are presented of calculations of the reflection coefficients from the NMB. We propose a new scheme of the total neutron polarization analysis for the time-of-flight method in the reflectometry. In this scheme, double NMB is used as a polarizer and there is no spin-flipper before the sample. NMB can be used in polarized neutron reflectometry, in SESANS, and for research of low-angle and inelastic scattering of polarized neutrons.