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

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.