Adapting a triple-axis spectrometer for small angle neutron scattering measurements

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Proceedings titleJournal Of Physics
ConferenceInternational Conference on Neutron Scattering 2009, May 3-7, 2009, Knoxville, Tennessee
Pages14; # of pages: 4
AbstractSmall angle neutron scattering (SANS) instruments typically require a cold source and a large spread of wavelengths in order to enhance incident flux. However, as a direct result of the unavailability of a cold source at the Canadian Neutron Beam Centre (CNBC), we have resorted to adapting a triple-axis spectrometer for SANS measurements. This is achieved through the use of multiple converging incident beams which enhance the neutron flux on the sample by a factor of 20, compared to a single beam of same spot size. Furthermore, smearing effects due to vertical divergence from the slit geometry are reduced through the use of horizontal Soller collimators. As a result, this modified triple-axis spectrometer enables SANS measurements to a minimum q value (qmin) of 0.006 Å-¹ [1]. Data obtained from the modified triple-axis spectrometer are in good agreement with those data from the 30 m NG3-SANS instrument located at the National Institute of Standards and Technology (Gaithersburg, MD, USA).
Publication date
AffiliationNRC Canadian Neutron Beam Centre; National Research Council Canada
Peer reviewedYes
NPARC number16945671
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Record identifiera140f763-13e2-4d0f-b8eb-ac1001b54a96
Record created2011-03-03
Record modified2016-05-09
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