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 Citationer (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.

Originalsprog	Engelsk
Tidsskrift	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Vol/bind	634
Udgave nummer	Suppl. 1
Sider (fra-til)	S138-S143
ISSN	0168-9002
Status	Udgivet - 1 apr. 2011

Emneord

Det Natur- og Biovidenskabelige Fakultet
Virtual experiments
Neutron scattering
Finite size broadening in single crystals

Citationsformater

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

I: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Bind 634, Nr. Suppl. 1, 01.04.2011, s. S138-S143.

Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › peer review

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AU - Willendrup, P.K.

AU - Knudsen, E.

AU - Niedermayer, Ch.

AU - Filges, U.

AU - Christensen, N.B.

AU - Farhi, E.

AU - Wells, B.O.

AU - Lefmann, Kim

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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.

AB - 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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KW - Neutron scattering

KW - Finite size broadening in single crystals

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JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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Analysing neutron scattering data using McStas virtual experiments

Abstract

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