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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Comparative study of multilayers used in monochromators for synchrotron-based coherent hard X-ray imaging
1European Synchrotron Radiation Facility, Grenoble Cedex, France. arack@snafu.de
Journal of Synchrotron Radiation
|June 23, 2010
Summary
Multilayer monochromators for hard X-ray micro-imaging were systematically studied. Material composition significantly impacts performance, guiding the design of advanced synchrotron radiation optics.
Area of Science:
- Materials Science
- Optics
- X-ray Physics
Background:
- Multilayer monochromators are crucial for hard X-ray micro-imaging.
- Understanding their performance characteristics is key to optimizing synchrotron radiation applications.
- Existing crystal-based devices have limitations in spectral bandwidth and photon flux density.
Purpose of the Study:
- To systematically characterize multilayers (W/Si, Mo/Si, Pd/B(4)C) with varying periodicity and layer count.
- To investigate intrinsic quality (roughness, reflectivity) and performance (homogeneity, coherence) as monochromators.
- To provide data for optimizing multilayer monochromator design for hard X-ray micro-imaging.
Main Methods:
- Fabrication and characterization of W/Si, Mo/Si, and Pd/B(4)C multilayers.
- Analysis of multilayer periodicity, roughness, and reflectivity.
- Evaluation of beam homogeneity and coherence for synchrotron radiation applications.
Main Results:
- Material composition was identified as the dominant factor influencing multilayer monochromator performance.
- Intrinsic quality and beam performance were correlated with material choices and structural parameters.
- Specific multilayer designs showed promise for enhanced micro-imaging capabilities.
Conclusions:
- Material selection is paramount for designing high-performance multilayer monochromators.
- These findings aid scientists and engineers in specifying optimal design parameters.
- Multilayer monochromators offer advantages over crystal-based devices for synchrotron-based micro-radiography and -tomography.
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