The performance of the small-angle diffractometer, SAND at IPNS.

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The time-of-flight small-angle diffractometer SAND has been serving the scientific user community since 1996. One notable feature of SAND is its capability to measure the scattered intensity in a wide Q (4{pi}sin{theta}/{lambda}, where 2{theta} is the scattering angle and {lambda} is the wavelength of the neutrons) range of 0.0035 to 0.5 {angstrom}{sup {minus}1} in a single measurement. The optical alignment system makes it easy to set up the instrument and the sample. The cryogenically cooled MgO filter reduces the fast neutrons over two orders of magnitude, while still transmitting over 70% of the cold neutrons. A drum chopper running at ... continued below

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17 p.

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Thiyagarajan, P. July 17, 1998.

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Description

The time-of-flight small-angle diffractometer SAND has been serving the scientific user community since 1996. One notable feature of SAND is its capability to measure the scattered intensity in a wide Q (4{pi}sin{theta}/{lambda}, where 2{theta} is the scattering angle and {lambda} is the wavelength of the neutrons) range of 0.0035 to 0.5 {angstrom}{sup {minus}1} in a single measurement. The optical alignment system makes it easy to set up the instrument and the sample. The cryogenically cooled MgO filter reduces the fast neutrons over two orders of magnitude, while still transmitting over 70% of the cold neutrons. A drum chopper running at 15 Hz suppresses the delayed neutron background. SAND has a variety of ancillary equipment to control the sample environment. In this paper we describe the features of the SAND instrument, compare its data on a few standard samples with those measured at well established centers in the world, and display two scientific examples which take advantage of measuring data in a wide Q-range in a single measurement. With a new set of tight collimators the Q{sub min} can be lowered to 0.002 {angstrom}{sup {minus}1} and the presently installed high-angle bank of detectors will extend the Q{sub max} to 2 {angstrom}{sup {minus}1}.

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17 p.

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INIS; OSTI as DE00010894

Medium: P; Size: 17 pages

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  • 14th Meeting of the International Collaboration on Advanced Neutron Sources, Utica, IL (US), 06/14/1998--06/19/1998

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  • Report No.: ANL/IPNS/CP-96859
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10894
  • Archival Resource Key: ark:/67531/metadc621053

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 17, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 3:45 p.m.

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Thiyagarajan, P. The performance of the small-angle diffractometer, SAND at IPNS., article, July 17, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc621053/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.