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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Continuous scanning for Bragg coherent X-ray imaging.

Ni Li1,2, Maxime Dupraz1,2, Longfei Wu2,3

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

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Summary
This summary is machine-generated.

Continuous scanning in Bragg coherent diffraction imaging significantly reduces scan times by 30%. This advanced technique minimizes sample instability, crucial for high-resolution imaging at modern light sources.

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Area of Science:

  • Materials Science
  • Physics
  • Nanotechnology

Background:

  • Bragg coherent diffraction imaging (BCDI) is a powerful technique for nanoscale structural analysis.
  • Conventional BCDI relies on step-by-step scanning, which can be time-consuming and prone to sample drift.
  • Dynamic processes and in-situ experiments are challenging with traditional scanning methods.

Purpose of the Study:

  • To investigate the efficacy of continuous scanning for BCDI data acquisition.
  • To demonstrate the feasibility and benefits of continuous scanning BCDI on a dynamic system.
  • To assess the impact of continuous scanning on scan time and data fidelity.

Main Methods:

  • Implementation of a continuous scanning protocol during BCDI data collection.
  • In-situ imaging of a single platinum (Pt) nanoparticle within a flow reactor under argon gas flow.
  • Reconstruction of electron density, phase, displacement, and strain fields from collected diffraction data.

Main Results:

  • Demonstrated the successful application of continuous scanning BCDI on a Pt nanoparticle in a flow reactor.
  • Achieved a 30% reduction in total scan time compared to conventional step-by-step scanning.
  • Obtained reconstructed fields (electron density, phase, displacement, strain) in excellent agreement with conventional BCDI results.

Conclusions:

  • Continuous scanning BCDI is a viable and efficient alternative to step-by-step scanning.
  • This method effectively minimizes sample instability, enhancing data quality.
  • Continuous scanning BCDI is particularly important for future diffraction-limited storage ring light sources and in-situ studies.