How to polarise all neutrons in one beam: a high performance polariser and neutron transport system

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. Wi...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-09, Vol.746 (1), p.12015
Main Authors: Rodriguez, D. Martin, Bentley, P. M., Pappas, C.
Format: Article
Language:English
Subjects:
Accelerator Physics and Instrumentation
Acceleratorfysik och instrumentering
Fysik
Monte Carlo simulations
Natural Sciences
Naturvetenskap
Neutron beams
neutron guides
neutron polarisers
Neutrons
Physical Sciences
Physics
Transportation systems
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Summary: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.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/746/1/012015