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Performance of the new pyrolytic graphite analyser bank on the near-backscattering spectrometer IRIS on the ISIS pulsed source

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Abstract.

The pyrolytic graphite (PG) analyser bank on the IRIS high-resolution quasi-elastic/low-energy inelastic neutron scattering spectrometer at ISIS has been upgraded. While the original analyser utilised a 6-row by 225-column array of graphite crystals cooled to 30 K, the new design is comprised of 4212 crystal pieces (18 rows by 234 columns). In addition, the graphite is now cooled close to liquid-helium temperature to further improve the sensitivity of the spectrometer. In this paper, the performance of the newly upgraded instrument is determined by comparing resolution measurements collected from the complete IRIS spectrometer before and after modification.

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Authors and Affiliations

  1. ISIS Facility, Rutherford Appleton Laboratory, OXON, OX11 0QX, UK, , , , , , GB

    M.T.F. Telling, S.I. Campbell, D.D. Abbley, D.A. Cragg & J.J.P. Balchin

  2. Institut Laue-Langevin 6, rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France, , , , , , FR

    C.J. Carlile

Authors
  1. M.T.F. Telling
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  2. S.I. Campbell
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  3. D.D. Abbley
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  4. D.A. Cragg
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  5. J.J.P. Balchin
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  6. C.J. Carlile
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Additional information

Received: 6 July 2001 / Accepted: 24 October 2001

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ID="*"Corresponding author. (Fax: +44-(0)/1235-445720, E-mail: m.telling@rl.ac.uk)

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Telling, M., Campbell, S., Abbley, D. et al. Performance of the new pyrolytic graphite analyser bank on the near-backscattering spectrometer IRIS on the ISIS pulsed source . Appl Phys A 74 (Suppl 1), s61–s63 (2002). https://doi.org/10.1007/s003390101077

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  • DOI: https://doi.org/10.1007/s003390101077

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