A comparison of different methods for improving flux and resolution on SANS instruments

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25 Scopus citations

Abstract

Small-angle neutron scattering (SANS) is one of the most popular and oversubscribed techniques at every user facility for neutron scattering studies of condensed matter that offers it. The limiting features in SANS experiment design are the length of time required to make a measurement and the minimum momentum transfer Q that can be measured, and the resolution. In the traditional pinhole-camera geometry, these two constraints are inextricably linked, forcing tradeoffs. However, a number of methods have been developed for reducing this linkage, thus allowing higher throughput while retaining high resolution and a low minimum Q. These methods include using multiple confocal pinhole apertures, lenses, and focusing mirrors. We compare and contrast these options and discuss their suitability for use on instruments at pulsed neutron sources.

Original languageEnglish
Pages (from-to)22-27
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume529
Issue number1-3 SPEC. ISS.
DOIs
StatePublished - Aug 21 2004
Externally publishedYes

Funding

Argonne National Laboratory is supported by the United States Department of Energy-Basic Energy Sciences under Contract No. W-31-109-ENG-38. This work was partially supported by the Special Coordination Funds for Promoting the Ministry of Education, Culture, Sports, Science, and Technology of the Government of Japan.

Keywords

  • Collimation
  • Instrumentation
  • Lens
  • Mirror
  • Neutron scattering
  • Resolution
  • SANS

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