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  • Rennie, Adrian R.Uppsala universitet,Materialfysik,Material Physics (författare)

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

  • Artikel/kapitelEngelska2013

Förlag, utgivningsår, omfång ...

  • 2013
  • electronicrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:uu-207741
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207741URI
  • https://doi.org/10.1107/S0021889813019468DOI
  • https://lup.lub.lu.se/record/4095875URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Measurements 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 Å, 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.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Hellsing, MajaUppsala universitet,Materialfysik(Swepub:uu)majhe101 (författare)
  • Wood, KathleenANSTO (författare)
  • Gilbert, ElliotANSTO (författare)
  • Porcar, LionelInstitut Laue Langevin (författare)
  • Schweins, RalfInstitut Laue Langevin (författare)
  • Dewhurst, CharlesInstitut Laue Langevin (författare)
  • Lindner, PeterInstitut Laue Langevin (författare)
  • Heenan, RichardSTFC Rutherford Appleton Lanoratory (författare)
  • Rogers, SarahSTFC Rutherford Appleton Laboratory (författare)
  • Butler, PaulNational Institute of Standards and Technology (författare)
  • Krzywon, JefferyNational Institute of Standards and Technology (författare)
  • Ghosh, RonUniversity College London (författare)
  • Jackson, AndrewLund University,Lunds universitet,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Other Institutions and Utilities,European Spallation Source AB(Swepub:lu)esss-ajc (författare)
  • Malfois, MarcDiamond Light Source (författare)
  • Uppsala universitetMaterialfysik (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Journal of applied crystallography46:5, s. 1289-12970021-88981600-5767

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