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Investigating time-of-flight spin-echo modulation for small-angle neutron scattering through experiments and simulation

Sales, Morten; Plomp, Jeroen; Habicht, Klaus and Strobl, Markus LU (2015) In Journal of Applied Crystallography 48. p.92-96
Abstract
A spin-echo-modulated small-angle neutron scattering (SEMSANS) instrument in a time-of-flight (TOF) mode will be able to excel at pulsed neutron sources such as the European Spallation Source (ESS), currently under construction. This work compares experimental data from a TOF SEMSANS setup, where a spatial beam modulation of a white beam is obtained using triangular field coils, with Monte Carlo ray-tracing simulations. The experiments and simulations in accordance demonstrate that a good contrast can be achieved when using a constant field in the triangular coils. In the reported setup only neutrons with certain wavelengths rotate by a Larmor precession angle that spatially modulates their polarization to coincide with the period of a... (More)
A spin-echo-modulated small-angle neutron scattering (SEMSANS) instrument in a time-of-flight (TOF) mode will be able to excel at pulsed neutron sources such as the European Spallation Source (ESS), currently under construction. This work compares experimental data from a TOF SEMSANS setup, where a spatial beam modulation of a white beam is obtained using triangular field coils, with Monte Carlo ray-tracing simulations. The experiments and simulations in accordance demonstrate that a good contrast can be achieved when using a constant field in the triangular coils. In the reported setup only neutrons with certain wavelengths rotate by a Larmor precession angle that spatially modulates their polarization to coincide with the period of a grating installed at the detector position. This is shown by measuring with a broad wavelength range while scanning the echo condition. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
spin-echo-modulated small-angle neutron scattering, time-of-flight mode
in
Journal of Applied Crystallography
volume
48
pages
92 - 96
publisher
Wiley-Blackwell
external identifiers
  • wos:000349210700013
  • scopus:84922281654
ISSN
1600-5767
DOI
10.1107/S1600576714025916
language
English
LU publication?
yes
id
c6565164-0165-4625-ace8-a77790824fb7 (old id 5187237)
date added to LUP
2015-03-30 13:28:23
date last changed
2017-10-22 03:31:47
@article{c6565164-0165-4625-ace8-a77790824fb7,
  abstract     = {A spin-echo-modulated small-angle neutron scattering (SEMSANS) instrument in a time-of-flight (TOF) mode will be able to excel at pulsed neutron sources such as the European Spallation Source (ESS), currently under construction. This work compares experimental data from a TOF SEMSANS setup, where a spatial beam modulation of a white beam is obtained using triangular field coils, with Monte Carlo ray-tracing simulations. The experiments and simulations in accordance demonstrate that a good contrast can be achieved when using a constant field in the triangular coils. In the reported setup only neutrons with certain wavelengths rotate by a Larmor precession angle that spatially modulates their polarization to coincide with the period of a grating installed at the detector position. This is shown by measuring with a broad wavelength range while scanning the echo condition.},
  author       = {Sales, Morten and Plomp, Jeroen and Habicht, Klaus and Strobl, Markus},
  issn         = {1600-5767},
  keyword      = {spin-echo-modulated small-angle neutron scattering,time-of-flight mode},
  language     = {eng},
  pages        = {92--96},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Applied Crystallography},
  title        = {Investigating time-of-flight spin-echo modulation for small-angle neutron scattering through experiments and simulation},
  url          = {http://dx.doi.org/10.1107/S1600576714025916},
  volume       = {48},
  year         = {2015},
}