Energy-resolved neutron imaging and diffraction including grain orientation mapping using event camera technology

被引：0

作者：

Tsviki Y. Hirsh ^{[1
]}

Andrew F. T. Leong ^{[2
]}

Adrian S. Losko ^{[3
]}

Alexander Wolfertz ^{[3
]}

Daniel J. Savage ^{[2
]}

Tim T. Jäger ^{[4
]}

John Rakovan ^{[5
]}

James J. Wall ^{[6
]}

Alexander M. Long ^{[7
]}

Sven C. Vogel ^{[2
]}

机构：

[1] Soreq Nuclear Research Center, Yavne

[2] Los Alamos National Laboratory, Los Alamos, 87545, NM

[3] Forschungs-Neutronenquelle Heinz Maier-Leibnitz, Garching

[4] Technical University Darmstadt, Darmstadt

[5] New Mexico Bureau of Geology & Mineral Resources, New Mexico Institute of Mining & Technology, Socorro, 87801, NM

[6] Nuclear Sector, Electric Power Research Institute, Charlotte, 28262, NC

[7] GWW School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, 30332, GA

来源：

Scientific Reports | / 15卷 / 1期

关键词：

Detector development; Neutron imaging; Time-of-flight;

D O I：

10.1038/s41598-025-96790-1

中图分类号：

学科分类号：

摘要：

Time-of-flight neutron diffraction and energy-resolved imaging each provide unique perspectives into material properties. Neutron diffraction is useful for assessing microstructural parameters such as phase composition, texture, and dislocation densities, though it typically provides averaged data over the sampled volume. Energy-resolved imaging, on the other hand, offers both spatial and spectral information by detecting Bragg edges and neutron absorption resonances, which enables detailed mapping of microstructure and isotopic composition. When combined, these techniques have the potential to enrich our understanding of material behavior across different scales, enhancing our understanding of complex materials. Traditionally, these modalities are conducted on separate instruments, which is time-consuming and poses challenges for data integration. Here, we report the integration of the LumaCam, an event-mode energy-resolved neutron imaging camera with the HIPPO time-of-flight diffractometer at LANSCE. This integration enables simultaneous diffraction and imaging across the full spectrum, with analysis optimized for diffraction and Bragg-edge imaging in the thermal range (0.45–10 Å) and resonance imaging in the epithermal range (0.5–3000 eV), facilitating comprehensive multi-modal analysis. We demonstrate its capabilities through case studies, including spatial mapping of grain orientations in a steel sample and accurate thickness estimations for irregular samples including a depleted uranium cylinder and a natural silver-containing mineral specimen. The combined setup enhances real-time sample alignment and provides comprehensive data for crystal structure, texture, and isotopic composition analysis. This approach opens new possibilities for advanced applications in nuclear engineering, archaeology, and materials science. © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2025.

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