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Updated: Jun 4, 2026
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
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
Summary
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.
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.
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