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We measured X-ray coherence using a new detector at PETRA III. Results match theoretical models, advancing synchrotron radiation analysis.

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Area of Science:

  • X-ray physics
  • Synchrotron radiation science
  • Detector technology

Background:

  • High-brilliance synchrotron radiation sources enable advanced X-ray experiments.
  • Accurate measurement of X-ray coherence is crucial for applications like coherent imaging.
  • Novel detector technologies are needed to keep pace with source brilliance.

Purpose of the Study:

  • To report on measurements of second-order intensity correlations using a novel detector.
  • To determine the transverse coherence length of X-rays at 14.4 keV.
  • To validate the performance of an adaptive gain integrating pixel detector prototype.

Main Methods:

  • Utilized the high-brilliance storage ring PETRA III.
  • Employed a prototype adaptive gain integrating pixel detector.
  • Measured second-order intensity correlations at various spatial separations for individual synchrotron radiation pulses (14.4 keV, ~5 MHz).

Main Results:

  • Successfully recorded individual synchrotron radiation pulses.
  • Determined the transverse coherence length at 14.4 keV.
  • Achieved good agreement between experimental measurements and Gaussian Schell model simulations.

Conclusions:

  • The adaptive gain integrating pixel detector is suitable for high-brilliance synchrotron radiation measurements.
  • The experimental method accurately determines transverse coherence length.
  • Validated theoretical models for X-ray coherence at high energies.