Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex

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dc.contributor.authorRennie, ARen_AU
dc.contributor.authorHellsing, MSen_AU
dc.contributor.authorWood, Ken_AU
dc.contributor.authorGilbert, EPen_AU
dc.contributor.authorPorcar, Len_AU
dc.contributor.authorSchweins, Ren_AU
dc.contributor.authorDewhurst, CDen_AU
dc.contributor.authorLindner, Pen_AU
dc.contributor.authorHeenan, RKen_AU
dc.contributor.authorRogers, SEen_AU
dc.contributor.authorButler, PDen_AU
dc.contributor.authorKrzywon, JRen_AU
dc.contributor.authorGhosh, REen_AU
dc.contributor.authorJackson, AJen_AU
dc.contributor.authorMalfois, Men_AU
dc.date.accessioned2014-06-26T00:57:24Zen_AU
dc.date.available2014-06-26T00:57:24Zen_AU
dc.date.issued2013-10-01en_AU
dc.date.statistics2014-06-26en_AU
dc.description.abstractMeasurements of a well-characterized 'standard' sample can verify the performance of an instrument. Typically, small-angle neutron scattering instruments are used to investigate a wide range of samples and may often be used in a number of configurations. Appropriate 'standard' samples are useful to test different aspects of the performance of hardware as well as that of the data reduction and analysis software. Measurements on a number of instruments with different intrinsic characteristics and designs in a round robin can not only better characterize the performance for a wider range of conditions but also, perhaps more importantly, reveal the limits of the current state of the art of small-angle scattering. The exercise, followed by detailed analysis, tests the limits of current understanding as well as uncovering often forgotten assumptions, simplifications and approximations that underpin the current practice of the technique. This paper describes measurements of polystyrene latex, radius 720 angstrom, with a number of instruments. Scattering from monodisperse, uniform spherical particles is simple to calculate and displays sharp minima. Such data test the calibrations of intensity, wavelength and resolution as well as the detector response. Smoothing due to resolution, multiple scattering and polydispersity has been determined. Sources of uncertainty are often related to systematic deviations and calibrations rather than random counting errors. The study has prompted development of software to treat modest multiple scattering and to better model the instrument resolution. These measurements also allow checks of data reduction algorithms and have identified how they can be improved. The reproducibility and the reliability of instruments and the accuracy of parameters derived from the data are described. © 2013, Wiley-Blackwell.en_AU
dc.identifier.citationRennie, A. R., Hellsing, M. S., Wood, K., Gilbert, E. P., Porcar, L., Schweins, R., Dewhurst, C. D., Lindner, P., Heenan, R. K., Rogers, S. E., Butler, P. D., Krzywon, J. R., Ghosh, R. E., Jackson, A. J., & Malfois, M. (2013). Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex. Journal of Applied Crystallography, 46(part 5), 1289-1297. doi:10.1107/s0021889813019468en_AU
dc.identifier.govdoc5425en_AU
dc.identifier.issn0021-8898en_AU
dc.identifier.issuePart 5en_AU
dc.identifier.journaltitleJournal of Applied Crystallographyen_AU
dc.identifier.pagination1289-1297en_AU
dc.identifier.urihttp://dx.doi.org/10.1107/s0021889813019468en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5719en_AU
dc.identifier.volume46en_AU
dc.language.isoenen_AU
dc.publisherWiley Blackwellen_AU
dc.subjectScatteringen_AU
dc.subjectNeutronsen_AU
dc.subjectPolystyreneen_AU
dc.subjectLatexen_AU
dc.subjectWateren_AU
dc.subjectViscosityen_AU
dc.titleLearning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latexen_AU
dc.typeJournal Articleen_AU
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