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Optimizing the visibility of X-ray phase grating interferometry
- The performance of grating interferometers coming up now for imaging interfaces within materials depends on the efficiency (visibility) of their main component, namely the phase grating. Therefore, experiments with monochromatic synchrotron radiation and corresponding simulations are carried out. The visibility of a phase grating is optimized by different photon energies, varying detector to grating distances and continuous rotation of the phase grating about the grid lines. Such kind of rotation changes the projected grating shapes, and thereby the distribution profiles of phase shifts. This yields higher visibilities than derived from ideal rectangular shapes. By continuous grating rotation and variation of the propagation distance, we achieve 2D visibility maps. Such maps provide the visibility for a certain combination of grating orientation and detector position. Optimum visibilities occur at considerably smaller distances than in the standard setup.
Author details: | Yury Shashev, Andreas KupschORCiD, Axel Lange, Sergei EvsevleevORCiD, Bernd R. Müller, Markus Osenberg, Ingo MankeORCiD, Manfred P. Hentschel, Giovanni BrunoORCiDGND |
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DOI: | https://doi.org/10.3139/120.111097 |
ISSN: | 0025-5300 |
Title of parent work (English): | Materials testing : Materialprüfung ; materials and components, technology and application |
Publisher: | Hanser |
Place of publishing: | München |
Publication type: | Article |
Language: | English |
Year of first publication: | 2017 |
Publication year: | 2017 |
Release date: | 2020/04/20 |
Tag: | Talbot-Lau interferometer; X-ray imaging; X-ray phase contrast; X-ray refraction; grating interferometry |
Volume: | 59 |
Number of pages: | 7 |
First page: | 974 |
Last Page: | 980 |
Funding institution: | Federal Institute for Materials Research and Testing |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer review: | Referiert |