Demonstration of neutron time-of-flight diffraction with an event-mode imaging detector
Tim T Jäger1,2, Adrian S Losko3, Alexander Wolfertz3
1Material Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Journal of Applied Crystallography
|August 7, 2024
Summary
A new Timepix3 detector system offers a cost-effective alternative for neutron diffraction, addressing the scarcity of helium-3. Initial tests show promising results for material microstructure analysis.
Area of Science:
- Materials Science
- Crystallography
- Neutron Scattering
Background:
- Traditional neutron diffraction detectors (Helium-3 tubes, scintillators) are costly and face material shortages.
- Developing new detector systems is crucial for advancing neutron instrumentation.
Purpose of the Study:
- Introduce a novel Timepix3-based event-mode imaging neutron diffraction detector.
- Evaluate its performance for crystallographic and microstructure analysis.
- Provide a cost-effective alternative for neutron beamlines.
Main Methods:
- Developed a Timepix3-based detector system for neutron diffraction.
- Conducted simultaneous measurements with existing Helium-3 detectors at the HIPPO diffractometer.
- Utilized MAUD code for data reduction and Rietveld analysis.
- Benchmarked results against McStas simulations.
Main Results:
- Demonstrated the feasibility of Timepix3 detectors for neutron powder diffraction.
- Achieved good agreement in peak resolution compared to simulations and existing detectors.
- Successfully performed Rietveld analysis on collected data.
Conclusions:
- The Timepix3 detector system shows significant potential for cost reduction in neutron instrumentation.
- This technology can be applied to new beamlines and upgrades of existing facilities.
- Further development could enhance its capabilities for materials research.
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