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Open AccessArticle

A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays

1
Karlsruhe Institute of Technology (KIT), Institute for Photon Science and Synchrotron Radiation (IPS), Herrmann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
2
New Mexico State University (NMSU), Department of Physics, 1255 N Horseshoe, Las Cruces, NM 88003-8001, USA
3
Physical-Technical Institute, Tomsk Polytechnic University (TPU), Lenin Avenue 30, 634050 Tomsk, Russia
4
Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology, Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
5
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
6
Karlsruhe Institute of Technology (KIT), Laboratory for Applications of Synchrotron Radiation (LAS), Engesserstrasse 15, 76131 Karlsruhe, Germany
*
Author to whom correspondence should be addressed.
Current address: Canadian Light Source, 44 Innovation Boulevard Saskatoon, Saskatoon, SK S7N 2V3, Canada.
Appl. Sci. 2018, 8(5), 737; https://doi.org/10.3390/app8050737
Received: 3 April 2018 / Revised: 27 April 2018 / Accepted: 27 April 2018 / Published: 7 May 2018
(This article belongs to the Special Issue Advanced EUV and X-Ray Optics)
An array of compound refractive X-ray lenses (CRL) with 20 × 20 lenslets, a focal distance of 20cm and a visibility of 0.93 is presented. It can be used as a Shack-Hartmann sensor for hard X-rays (SHARX) for wavefront sensing and permits for true single-shot multi-contrast imaging the dynamics of materials with a spatial resolution in the micrometer range, sensitivity on nanosized structures and temporal resolution on the microsecond scale. The object’s absorption and its induced wavefront shift can be assessed simultaneously together with information from diffraction channels. In contrast to the established Hartmann sensors the SHARX has an increased flux efficiency through focusing of the beam rather than blocking parts of it. We investigated the spatiotemporal behavior of a cavitation bubble induced by laser pulses. Furthermore, we validated the SHARX by measuring refraction angles of a single diamond CRL, where we obtained an angular resolution better than 4 μ rad. View Full-Text
Keywords: X-ray lens; multi-contrast imaging; phase-contrast imaging X-ray lens; multi-contrast imaging; phase-contrast imaging
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MDPI and ACS Style

Dos Santos Rolo, T.; Reich, S.; Karpov, D.; Gasilov, S.; Kunka, D.; Fohtung, E.; Baumbach, T.; Plech, A. A Shack-Hartmann Sensor for Single-Shot Multi-Contrast Imaging with Hard X-rays. Appl. Sci. 2018, 8, 737.

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