@article{ShashevKupschLangeetal.2016,
  author    = {Shashev, Yury and Kupsch, Andreas and Lange, Axel and M{\"u}ller, Bernd R. and Bruno, Giovanni},
  title     = {Improving the visibility of phase gratings for Talbot-Lau X-ray imaging},
  series = {Materials testing : Materialpr{\~A}¼fung ; materials and components, technology and application},
  volume    = {58},
  journal   = {Materials testing : Materialpr{\~A}¼fung ; materials and components, technology and application},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  issn      = {0025-5300},
  doi       = {10.3139/120.110948},
  pages     = {970 -- 974},
  year      = {2016},
  abstract  = {Talbot-Lau interferometry provides X-ray imaging techniques with significant enhancement of the radiographic contrast of weakly absorbing objects. The grating based technique allows separation of absorption, refraction and small angle scattering effects. The different efficiency of rectangular and triangular shaped phase gratings at varying detector distances is investigated. The interference patterns (Talbot carpets) are modeled for parallel monochromatic radiation and measured by synchrotron radiation. In comparison to rectangular shapes of phase gratings much higher visibility is obtained for triangular shapes which yield enhanced contrast of a glass capillary test specimen.},
  language  = {en}
}
@article{ShashevKupschLangeetal.2017,
  author    = {Shashev, Yury and Kupsch, Andreas and Lange, Axel and Evsevleev, Sergei and M{\"u}ller, Bernd R. and Osenberg, Markus and Manke, Ingo and Hentschel, Manfred P. and Bruno, Giovanni},
  title     = {Optimizing the visibility of X-ray phase grating interferometry},
  series = {Materials testing : Materialpr{\"u}fung ; materials and components, technology and application},
  volume    = {59},
  journal   = {Materials testing : Materialpr{\"u}fung ; materials and components, technology and application},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  issn      = {0025-5300},
  doi       = {10.3139/120.111097},
  pages     = {974 -- 980},
  year      = {2017},
  abstract  = {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.},
  language  = {en}
}
@article{KupschMuellerLangeetal.2017,
  author    = {Kupsch, Andreas and Mueller, Bernd R. and Lange, Axel and Bruno, Giovanni},
  title     = {Microstructure characterisation of ceramics via 2D and 3D X-ray refraction techniques},
  series = {Journal of the European Ceramic Society},
  volume    = {37},
  journal   = {Journal of the European Ceramic Society},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0955-2219},
  doi       = {10.1016/j.jeurceramsoc.2016.12.031},
  pages     = {1879 -- 1889},
  year      = {2017},
  abstract  = {3D imaging techniques are very fashionable nowadays, and allow enormous progress in understanding ceramic microstructure, its evolution, and its link to mechanical, thermal, and transport properties. In this feature article, we report the use of a powerful, yet not so wide-spread, set of X-ray techniques based on refraction effects. X-ray refraction allows determining internal specific surface (surface per unit volume) in a non-destructive fashion, position and orientation sensitive, and with a nanometric detectability. While the techniques are limited by the X-ray absorption of the material under investigation, we demonstrate showcases of ceramics and composite materials, where understanding of process parameter influence or simply of microstructural parameters could be achieved in a way unrivalled even by high-resolution techniques such as electron microscopy or computed tomography. (C) 2016 Elsevier Ltd. All rights reserved.},
  language  = {en}
}