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Alignment facility and software for single-crystal time-of-flight neutron spectroscopy.

Zihao Liu1, Harry Lane1,2,3, Christopher D Frost3

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Summary

A new instrument and software algorithm enable the quality characterization and alignment of large single crystals for neutron spectroscopy experiments at the ISIS spallation neutron source.

Keywords:
characterizationneutronspole figures

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Area of Science:

  • Materials Science
  • Neutron Scattering
  • Crystallography

Background:

  • Characterizing and aligning large single crystals is crucial for neutron spectroscopy experiments.
  • Existing methods may be time-consuming or lack the precision required for advanced studies.
  • The ISIS spallation neutron source provides a unique facility for such investigations.

Purpose of the Study:

  • To introduce a novel instrument and software algorithm for characterizing large single crystals.
  • To enable precise alignment of samples within a specific scattering plane.
  • To facilitate structural characterization of single crystals for neutron spectroscopy.

Main Methods:

  • Development of a dedicated instrument at the ISIS Alignment Facility.
  • Implementation of a software algorithm for automated sample quality assessment and alignment.
  • Utilizing the instrument and software for structural characterization of lead magnesium niobate (Pb(Mg1/3Nb2/3)O3) single crystals.

Main Results:

  • Successful characterization of large single crystal quality and alignment.
  • Demonstrated utility of the instrument and software through the structural analysis of Pb(Mg1/3Nb2/3)O3.
  • The developed method provides a reliable approach for sample preparation in neutron scattering.

Conclusions:

  • The described instrument and software algorithm effectively characterize and align large single crystals.
  • This tool is valuable for pre-characterizing samples for neutron spectroscopy experiments.
  • Recommendations for future instrument modifications and integration into other spallation neutron sources are proposed.