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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

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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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Controlling X-ray deformable mirrors during inspection.

Lei Huang1, Junpeng Xue1, Mourad Idir1

  • 1NSLS-II, Brookhaven National Laboratory, Bldg 703, Upton, NY 11973-5000, USA.

Journal of Synchrotron Radiation
|October 28, 2016
PubMed
Summary
This summary is machine-generated.

This study presents a fast method to shape X-ray deformable mirrors (XDM) using only a few measurements. This technique significantly reduces the time needed for XDM calibration in synchrotron and free-electron laser facilities.

Keywords:
B-spline curve fittingX-ray deformable mirroractive opticsmirror inspectionwindowed Fourier transform

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Area of Science:

  • Optics
  • Materials Science
  • Synchrotron Radiation

Background:

  • X-ray deformable mirrors (XDM) are crucial for wavefront correction in advanced light sources.
  • Traditional XDM calibration is time-consuming due to actuator coupling and long response times.

Purpose of the Study:

  • To develop a fast and accurate method for driving XDMs to a target shape.
  • To reduce the number of measurements required for XDM calibration.

Main Methods:

  • A novel iterative feedback approach using metrology data.
  • Calculation of curvature discrepancy between current and target mirror shapes.
  • Application of three distinct derivative estimation methods for curvature calculation.

Main Results:

  • The proposed method drives XDMs to target shapes using only three or four measurements.
  • Iterative compensations effectively bring the mirror shape close to the desired target.
  • Experimental validation demonstrates the feasibility and effectiveness of the approach.

Conclusions:

  • A significantly faster and efficient method for XDM calibration has been developed.
  • This technique minimizes downtime and enhances the usability of XDMs in experimental facilities.
  • The approach offers a practical solution for real-time wavefront control in X-ray applications.