Analysing neutron scattering data using McStas virtual experiments

L. Udby, Peter Kjær Willendrup, Erik Bergbäck Knudsen, Ch. Niedermayer, U. Filges, Niels Bech Christensen, E. Farhi, B.O. Wells, Kim Lefmann

    Research output: Contribution to journalJournal articleResearchpeer-review

    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 1–3% 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 languageEnglish
    JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Volume634
    Issue numberSuppl. 1
    Pages (from-to)S138-S143
    ISSN0168-9002
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Materials and energy storage
    • Superconducting materials

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