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Full Record Details
DOI
10.5286/raltr.2020002
Persistent URL
http://purl.org/net/epubs/work/45175165
Record Status
Checked
Record Id
45175165
Title
Neutron-ray tracing simulations for the upgrade of the primary spectrometer of OSIRIS
Contributors
A Perrichon (STFC Rutherford Appleton Lab.)
,
F Demmel (STFC Rutherford Appleton Lab.)
Abstract
A new supermirror guide is proposed to replace the current neutron guide of the indirect time-of-flight near-backscattering spectrometer OSIRIS. Here we present an extensive Monte Carlo simulation study for the design and optimisation of the new guide system. Amongst the several guide geometries assessed, a curved guide with elliptical defocusing and focusing sections emerged as the best option. The estimated gain in intensity is a factor of 5–6 at the sample position with a homogeneous distribution of the divergence. For single-crystal experiments, the divergence can be controlled by the use of two slits. The elliptic geometry results in a smaller beam spot and smaller samples will particularly benefit from this upgrade. The proposed guide replacement will ensure that the OSIRIS spectrometer will remain competitive in the years to come.
Organisation
ISIS
,
ISIS-OSIRIS
,
STFC
Keywords
Funding Information
Related Research Object(s):
Licence Information:
Creative Commons Attribution 4.0 International (CC BY 4.0)
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Report
RAL Technical Reports
RAL-TR-2020-002. STFC, 2020.
RAL-TR-2020-002.pdf
2020
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