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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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X-Ray Interferometry at ESRF Using Two Coherent Beams from Fresnel Mirrors.

K Fezzaa1, F Comin, S Marchesini

  • 1European Synchrotron Radiation Facility (ESRF), Avenue des Martyrs, BP 220 38043 Grenoble Cedex, France.

Journal of X-Ray Science and Technology
|February 11, 2011
PubMed
Summary
This summary is machine-generated.

Researchers measured X-ray beam coherence using two mirrors at the European Synchrotron Radiation Facility. This method precisely determines transverse coherence distances, crucial for advanced synchrotron beamline characterization.

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Area of Science:

  • Physics
  • Optics
  • Materials Science

Background:

  • Coherence properties of X-ray beams are critical for advanced applications.
  • Characterizing transverse coherence is essential for optimizing X-ray beamlines.
  • Existing methods for coherence measurement can be complex and limited.

Purpose of the Study:

  • To develop and demonstrate a novel method for measuring the transverse coherence of partially coherent X-ray beams.
  • To utilize grazing incidence mirrors for interference pattern generation.
  • To precisely quantify both vertical and horizontal coherence distances.

Main Methods:

  • Employed two small flat mirrors under grazing incidence.
  • Generated interference patterns from partially coherent X-ray beams.
  • Used piezoelectric actuators for precise mirror orientation control.
  • Measured vertical and horizontal transverse coherence distances.

Main Results:

  • Successfully produced interference patterns from partially coherent X-ray beams.
  • Demonstrated the ability to measure both vertical and horizontal transverse coherence distances.
  • Achieved precise control over mirror orientation for accurate measurements.

Conclusions:

  • The experimental setup provides an effective method for characterizing X-ray beam coherence.
  • This technique is valuable for optimizing and understanding X-ray synchrotron beamlines.
  • The piezoelectric-controlled mirror system offers high precision for coherence measurements.