Design and performance of the variable-wavelength Bonse-Hart ultra-small-angle neutron scattering diffractometer KOOKABURRA at ANSTO:

Christine Rehm*, Liliana De Campo, Alain Brûlé, Frank Darmann, Friedl Bartsch, Andrew Berry

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The double-crystal ultra-small-angle neutron scattering (USANS) diffractometer KOOKABURRA at ANSTO was made available for user experiments in 2014. KOOKABURRA allows the characterization of microstructures covering length scales in the range of 0.1-10âC&àμm. Use of the first- and second-order reflections coming off a doubly curved highly oriented mosaic pyrolytic graphite premonochromator at a fixed Bragg angle, in conjunction with two interchangeable pairs of Si(111) and Si(311) quintuple-reflection channel-cut crystals, permits operation of the instrument at two individual wavelengths, 4.74 and 2.37âC&àÅ. This unique feature among reactor-based USANS instruments allows optimal accommodation of a broad range of samples, both weakly and strongly scattering, in one sample setup. The versatility and capabilities of KOOKABURRA have already resulted in a number of research papers, clearly demonstrating that this instrument has a major impact in the field of large-scale structure determination.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalJournal of Applied Crystallography
Volume51
Issue number1
DOIs
StatePublished - Feb 2018

Keywords

  • Bonse-Hart
  • KOOKABURRA
  • microstructure characterization
  • ultra-small-angle neutron scattering

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