EMU, the backscattering spectrometer at the Australian Centre for Neutron Scattering

Simple item page
dc.contributor.authorIles, GNen_AU
dc.contributor.authorde Souza, NRen_AU
dc.contributor.authorKlapproth, Aen_AU
dc.date.accessioned2021-08-24T22:44:05Zen_AU
dc.date.available2021-08-24T22:44:05Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-17en_AU
dc.description.abstractThe cold-neutron backscattering spectrometer, EMU, one of the four spectrometers at ANSTO, received its operating licence in 2016. First spectra were obtained from measurements on laboratory standards such as polyethylene, m-Xylene and ammonia perchlorate [1]. The high energy resolution of EMU allows dynamics in the nanosecond timeframe to be observed. This high resolution is due to backscattering from the Si (111) crystal monochromator and analyser arrays, delivering a spectrometer FWHM energy resolution in the order of 1.2µeV. EMU also features a linear Doppler drive modulating incident neutron energies over ± 31 µeV. Scattered, analysed neutrons are counted in 3He LPSD arrays. By setting the Doppler-driven backscattering monochromator to zero motion, elastic fixed window scans (EFW) can be performed. Changes in intensity of the analysed neutrons,with changing temperature, for example, correspond to changing dynamics in the system. Alternatively, when the incident energy is modulated, quasi-elastic neutron scattering (QENS) can be used to observe changes in the profile shape of the elastic peak. Finally, EMU can be used to observe purely inelastic scattering, such as observed in samples exhibiting rotational tunnelling. Future work will involve developing MANTID software for data treatment and analysis, and continuing to improve the signal-to-noise ratio.en_AU
dc.identifier.citationIles, G., de Souza, N., & Klapproth, A. (2017). EMU, the backscattering spectrometer at the Australian Centre for Neutron Scattering. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11471en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectCold neutronsen_AU
dc.subjectBackscatteringen_AU
dc.subjectSpectrometersen_AU
dc.subjectANSTOen_AU
dc.subjectMonochromatorsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectInelastic scatteringen_AU
dc.titleEMU, the backscattering spectrometer at the Australian Centre for Neutron Scatteringen_AU
dc.typeConference Abstracten_AU
Files
Original bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
11_1027 EMU, the backscattering spectrometer at the Australian Centre for Neutron Scattering.pdf
Size:
3.81 KB
Format:
Adobe Portable Document Format
Description:
Download
Thumbnail Image
Name:
ICNS2017_final_program.pdf
Size:
5.42 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Conference Publications