A compact-rigid multi-analyser for energy and angle filtering of high-resolution X-ray experiments. Part 1....

Area of Science:

• Materials Science
• Crystallography
• Analytical Chemistry

Background:

• Multi-analyser crystal systems for diffraction and spectroscopy are established at synchrotron sources but challenging for laboratory use.
• Existing multi-filtering systems for powder diffraction have been optimized for relevance, simplicity, and efficiency.
• Logarithmic spiral surfaces provide stability for high-resolution and high-sensitivity powder diffraction experiments.

Purpose of the Study:

• To develop and optimize multi-filtering systems for powder diffraction experiments.
• To demonstrate the relevance, simplicity, and efficiency of these systems.
• To adapt advanced filtering techniques for laboratory X-ray sources.

Main Methods:

• Development of optical filter systems with diffracting elements on logarithmic spiral surfaces.
• Rigid and compact multi-analyser comb design for parallel measurement filtering.
• Integration with photon-counting 1D and 2D detectors.

Main Results:

• A rigid-compact multi-analyser comb was realized, filtering 20-50 measurements in parallel on synchrotron sources.
• The system was adapted for laboratory X-ray sources (Ag Kα1), increasing measurement intensities and resolutions by an order of magnitude.
• Improved detection thresholds below 0.1% were achieved, enabling minor phase detection.

Conclusions:

• The developed multi-analyser comb offers a simple, efficient, and adaptable solution for powder diffraction.
• Significant enhancements in intensity and resolution are achievable on laboratory X-ray sources.
• The system drastically improves detection limits for minor phase analysis in complex materials.