QUOKKA, the pinhole small‐angle neutron scattering instrument at the OPAL Research Reactor, Australia: design, performance, operation and scientific highlights

QUOKKA is a 40 m pinhole small‐angle neutron scattering instrument in routine user operation at the OPAL research reactor at the Australian Nuclear Science and Technology Organisation. Operating with a neutron velocity selector enabling variable wavelength, QUOKKA has an adjustable collimation syste...

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Bibliographic Details
Published in:	Journal of applied crystallography Vol. 51; no. 2; pp. 294 - 314
Main Authors:	Wood, Kathleen, Mata, Jitendra P., Garvey, Christopher J., Wu, Chun-Ming, Hamilton, William A., Abbeywick, Peter, Bartlett, Daniel, Bartsch, Friedl, Baxter, Peter, Booth, Norman, Brown, Warren, Christoforidis, Jason, Clowes, Douglas, d'Adam, Timothy, Darmann, Frank, Deura, Michael, Harrison, Shane, Hauser, Nick, Horton, Glen, Federici, David, Franceschini, Ferdi, Hanson, Philip, Imamovic, Eno, Imperia, Paolo, Jones, Martin, Kennedy, Shane, Kim, Sungjoong, Lam, Tony, Lee, Wai Tung, Lesha, Mark, Mannicke, David, Noakes, Terry, Olsen, Scott R., Osborn, John C., Penny, David, Perry, Merv, Pullen, Stewart A., Robinson, Robert A., Schulz, Jamie C., Xiong, Norman, Gilbert, Elliot P.
Format:	Journal Article
Language:	English
Published:	5 Abbey Square, Chester, Cheshire CH1 2HU, England International Union of Crystallography 01-04-2018 Blackwell Publishing Ltd
Subjects:	Beams (radiation) Collimation Industrial applications Magnetism Neutron scattering neutron scattering instruments Neutrons Optics Position measurement QUOKKA Reactors SANS variable wavelength
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Summary:	QUOKKA is a 40 m pinhole small‐angle neutron scattering instrument in routine user operation at the OPAL research reactor at the Australian Nuclear Science and Technology Organisation. Operating with a neutron velocity selector enabling variable wavelength, QUOKKA has an adjustable collimation system providing source–sample distances of up to 20 m. Following the large‐area sample position, a two‐dimensional 1 m2 position‐sensitive detector measures neutrons scattered from the sample over a secondary flight path of up to 20 m. Also offering incident beam polarization and analysis capability as well as lens focusing optics, QUOKKA has been designed as a general purpose SANS instrument to conduct research across a broad range of scientific disciplines, from structural biology to magnetism. As it has recently generated its first 100 publications through serving the needs of the domestic and international user communities, it is timely to detail a description of its as‐built design, performance and operation as well as its scientific highlights. Scientific examples presented here reflect the Australian context, as do the industrial applications, many combined with innovative and unique sample environments. The design, performance, operation and scientific highlights from the QUOKKA SANS instrument at the OPAL Research Reactor, Australia, are described.
ISSN:	1600-5767 0021-8898 1600-5767
DOI:	10.1107/S1600576718002534