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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Related Experiment Video

Updated: May 7, 2026

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Improved image reconstruction in coherent diffraction imaging using self-seeded XFEL pulses.

Jaeyong Shin1, Junha Hwang2, Sejin Kim3

  • 14GSR Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.

Journal of Synchrotron Radiation
|May 6, 2026
PubMed
Summary
This summary is machine-generated.

Coherent diffraction imaging (CDI) relies on photon coherence. Using X-ray free-electron laser (XFEL) self-seeding beams improves image reconstruction quality due to narrower bandwidth, enhancing CDI reliability.

Keywords:
X-ray free-electron laserscoherencecoherent diffraction imagingself-seedingtemporal coherence

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Area of Science:

  • X-ray science
  • Coherent diffraction imaging
  • Nanoparticle imaging

Background:

  • Photon coherence is crucial for lensless imaging in coherent diffraction imaging (CDI).
  • The impact of coherence in X-ray free-electron laser (XFEL)-CDI requires systematic investigation.

Purpose of the Study:

  • To examine the relationship between XFEL pulse coherence (transverse and temporal) and image reconstruction quality in XFEL-CDI.
  • To compare image reconstruction from self-amplified spontaneous emission (SASE) and self-seeding XFEL beams.

Main Methods:

  • Collected diffraction patterns from a single gold nanoparticle using XFELs at 5 keV.
  • Investigated properties of SASE and self-seeding beams.
  • Compared reconstructed image quality from both beam modes.

Main Results:

  • The self-seeding beam resulted in more reliable image reconstruction compared to the SASE beam.
  • Improved reconstruction quality is attributed to the narrower bandwidth of the self-seeding X-ray pulses.

Conclusions:

  • Utilizing self-seeding beams in XFEL-CDI experiments offers significant advantages.
  • Self-seeding beams enhance the reliability and quality of structural information retrieval in CDI.