Analysing neutron scattering data using McStas virtual experiments

Linda Udby; P.K. Willendrup; E. Knudsen; Ch. Niedermayer; U. Filges; N.B. Christensen; E. Farhi; B.O. Wells; Kim Lefmann

Analysing neutron scattering data using McStas virtual experiments

Linda Udby, P.K. Willendrup, E. Knudsen, Ch. Niedermayer, U. Filges, N.B. Christensen, E. Farhi, B.O. Wells, Kim Lefmann

19 Citations (Scopus)

Abstract

With the intention of developing a new data analysis method using virtual experiments we have built a detailed virtual model of the cold triple-axis spectrometer RITA-II at PSI, Switzerland, using the McStas neutron ray-tracing package. The parameters characterising the virtual instrument were carefully tuned against real experiments. In the present paper we show that virtual experiments reproduce experimentally observed linewidths within 13% for a variety of samples. Furthermore we show that the detailed knowledge of the instrumental resolution found from virtual experiments, including sample mosaicity, can be used for quantitative estimates of linewidth broadening resulting from, e.g., finite domain sizes in single-crystal samples.

Original language	English
Journal	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	634
Issue number	Suppl. 1
Pages (from-to)	S138-S143
ISSN	0168-9002
Publication status	Published - 1 Apr 2011

Keywords

Faculty of Science

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Analysing neutron scattering data using McStas virtual experiments. / Udby, Linda; Willendrup, P.K.; Knudsen, E. et al.

In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 634, No. Suppl. 1, 01.04.2011, p. S138-S143.

Research output: Contribution to journal › Conference article › Research › peer-review

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AU - Filges, U.

AU - Christensen, N.B.

AU - Farhi, E.

AU - Wells, B.O.

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N2 - With the intention of developing a new data analysis method using virtual experiments we have built a detailed virtual model of the cold triple-axis spectrometer RITA-II at PSI, Switzerland, using the McStas neutron ray-tracing package. The parameters characterising the virtual instrument were carefully tuned against real experiments. In the present paper we show that virtual experiments reproduce experimentally observed linewidths within 13% for a variety of samples. Furthermore we show that the detailed knowledge of the instrumental resolution found from virtual experiments, including sample mosaicity, can be used for quantitative estimates of linewidth broadening resulting from, e.g., finite domain sizes in single-crystal samples.

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Analysing neutron scattering data using McStas virtual experiments

Abstract

Keywords

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