Conical shell illumination incorporating a moving aperture for depth-resolved high-energy X-ray diffraction

Area of Science:

• Materials Science
• Crystallography
• Analytical Chemistry

Background:

• X-ray absorption methods are limited by attenuation coefficients, offering little insight into chemical or crystallographic properties.
• Standard X-ray diffraction is effective for well-prepared samples but unsuitable for thick, heterogeneous materials.
• Accurate material characterization requires measuring diffracted photons, not just attenuated ones.

Purpose of the Study:

• To develop a new high-energy X-ray diffraction probe for analyzing complex materials.
• To enable depth-resolving material signature identification within an inspection space.
• To provide a cost-effective and rapid solution for material analysis in various applications.

Main Methods:

• Development of a novel high-energy X-ray diffraction probe utilizing a single beam and point detector.
• Implementation of a swept aperture technique for resolving sample signatures at unknown locations.
• Utilized Monte Carlo simulations to validate experimental results for material localization and identification.

Main Results:

• The new probe successfully localized and identified single- and multiple-material samples.
• Demonstrated the probe's capability to resolve sample signatures within an inspection space.
• Validated the effectiveness of the single beam, swept aperture approach.

Conclusions:

• The developed X-ray diffraction probe overcomes limitations of existing methods for heterogeneous samples.
• The probe offers a rapid, cost-effective solution for material analysis, applicable to explosives detection and process control.
• This technique provides a significant advancement in non-destructive material characterization.