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A dynamically adjustable wavelength-sensitive neutron filter

Research output: Contribution to journalJournal article


  • N. D. Vasilev
  • T. R. Charlton
  • O. Kirichek
  • C. J. Kinane
  • E. M. Schooneveld
  • S. Langridge
  • W. A. Kockelmann
  • P. V. E. McClintock
Journal publication date11/06/2012
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Number of pages3
Original languageEnglish


The prototype of a wavelength-sensitive neutron filter has been realized and tested successfully for the first time. The filter exploits the neutron wavelength dependence of the transparency of He-3 gas. The analysis of test results gives high wavelength resolution Delta lambda/lambda similar or equal to 0.5% over the broad wavelength range 0.2-5.2 angstrom. We propose an idea to expand the filter range in the short wavelength direction by use of a cryogenic environment, and also consider the use of media using other than He-3 gas. The proposed filter might be used in advanced reflectometers and SANS2D neutron scattering instruments. (C) 2012 Elsevier B.V. All rights reserved.