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Bragg coherent diffraction imaging with the CITIUS charge-integrating detector.

Michael Grimes1,2, Kristof Pauwels2, Tobias U Schülli2

  • 1Université Grenoble Alpes, CEA Grenoble, IRIG, MEM, NRS, 17 rue des Martyrs, F-38000 Grenoble, France.

Journal of Applied Crystallography
|August 9, 2023
PubMed
Summary
This summary is machine-generated.

The CITIUS detector, a new high-speed X-ray imager, significantly accelerates Bragg coherent diffraction imaging. It achieves comparable resolution to photon-counting detectors but in a fraction of the time.

Keywords:
Bragg coherent diffraction imagingcharge-integrating detectorsdynamic rangefourth-generation synchrotronsphoton-counting detectors

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Area of Science:

  • X-ray imaging
  • Diffraction imaging
  • Materials science

Background:

  • High-speed X-ray imaging is crucial for advanced material analysis.
  • Bragg coherent diffraction imaging (BCDI) requires detectors with high dynamic range and speed.
  • Existing detectors face limitations in acquisition speed and data throughput.

Purpose of the Study:

  • To evaluate the performance of the CITIUS detector for BCDI applications.
  • To compare the CITIUS detector with existing photon-counting detectors in BCDI.
  • To assess the potential of CITIUS for dynamic BCDI measurements.

Main Methods:

  • Utilized the CITIUS detector at the European Synchrotron's Extremely Brilliant Source (ESRF-EBS).
  • Performed BCDI experiments on nanoscale materials.
  • Compared spatial resolution and acquisition times against a photon-counting detector.

Main Results:

  • CITIUS detector achieved a spatial resolution of 20 ± 6 nm, comparable to photon-counting detectors (22 ± 9 nm).
  • Acquisition time was drastically reduced from 200 s to 23 s using CITIUS.
  • Demonstrated consistent linear response at high frame rates (17.4 kHz) and high saturation count rates (>30 Mcps/pixel).

Conclusions:

  • The CITIUS detector offers a significant advancement for BCDI, enabling faster and more efficient imaging.
  • Its high speed and linear response make it suitable for dynamic BCDI experiments.
  • Further optimizations are suggested to enhance its capabilities for advanced coherent imaging techniques.