How to polarise all neutrons in one beam

A high performance polariser and neutron transport system

Journal article (2016)

Authors

D. Martin Rodriguez European Spallation Source ESS ERIC
P. M. Bentley European Spallation Source ESS ERIC, Uppsala University
C. Pappas RST/Neutron and Positron Methods in Materials - AS
Research Group
RST/Neutron and Positron Methods in Materials (AS) (TU Delft)
Copyright: © 2016 D. Martin Rodriguez, P. M. Bentley, C. Pappas
DOI
help_outline
https://doi.org/10.1088/1742-6596/746/1/012015
More Info
expand_more

Published Date

10-10-2016

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Neutron and Positron Methods in Materials

Abstract

Polarised neutron beams are used in disciplines as diverse as magnetism,soft matter or biology. However, most of these applications often suffer from low flux also because the existing neutron polarising methods imply the filtering of one of the spin states, with a transmission of 50% at maximum. With the purpose of using all neutrons that are usually discarded, we propose a system that splits them according to their polarisation, flips them to match the spin direction, and then focuses them at the sample. Monte Carlo (MC) simulations show that this is achievable over a wide wavelength range and with an outstanding performance at the price of a more divergent neutron beam at the sample position.