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X-ray grating interferometry for 9.25 keV design energy at a liquid-metal-jet source

: Balles, A.; Fella, C.; Dittmann, J.; Wiest, W.; Zabler, S.; Hanke, R.


Jonge, M.D. de:
XRM 2014, 12th International Conference on X-Ray Microscopy. Proceedings : Melbourne, Australia, 26-31 October 2014
Melville/NY: AIP Publishing, 2016 (AIP Conference Proceedings 1696)
ISBN: 978-0-7354-1343-6
Art. 020043, 7 pp.
International Conference on X-Ray Microscopy (XRM) <12, 2014, Melbourne>
Conference Paper
Fraunhofer IIS ()

In this paper we present a grating interferometer setup with a liquid-metal-jet source and a high resolution detector. It will be shown that this source is suitable for interferometer setups as it delivers a sufficient spatial coherence that makes a source grating unnecessary. This is confirmed twice by the results of an interferometer setup and a single grating setup, respectively. Both show comparable information on the samples. Furthermore, it was possible to measure the Talbot effect due to the self-built high resolution detector with an effective pixel size of 0.67 µm and due to the coherence of the source, thanks to a small spot size of a few microns. The information on the absorption of a nylon fiber is observed to include inline phase contrast effects. The dark-field signal of a carbon fiber reinforced polymer (CFRP) is not quite well understood because of its inhomogeneity.