%0 conference paper
%@ 
%A Herzen, J., Beckmann, F., Donath, T., Ogurreck, M., David, C., Pfeiffer, F., Mohr, J., Reznikova, E., Riekehr, S., Haibel, A., Schulz, G., Mueller, B., Schreyer, A.

%D 2010
%J Proceedings of SPIE, Developments in X-Ray Tomography VII, SPIE Conference Optics & Photonics 2010

%P 780407 
%R doi:10.1117/12.860733
%T X-ray grating interferometer for imaging at a second-generation synchrotron radiation source
%U https://doi.org/10.1117/12.860733
 
%X X-ray phase-contrast radiography and tomography enables to increase contrast for weakly absorbing materials. Recently, x-ray grating interferometers were developed which extend the possibility of phase-contrast imaging from highly brilliant radiation sources like third-generation synchrotron even to non-coherent sources. Here, we present a setup of an x-ray grating interferometer designed and installed at low-coherence wiggler source at the GKSS beamline W2 (HARWI II) operated at the second-generation synchrotron storage ring DORIS at the Deutsches Elektronen-Synchrotron (DESY, Hamburg, Germany). The beamline is dedicated to imaging in materials science. Equipped with the grating interferometer, it is the first synchrotron radiation beamline with a three-grating setup combining the advantages of phase-contrast imaging with monochromatic radiation with very high flux and a sufficiently large field of view for centimeter sized objects. Examples of radiography on laser-welded aluminum and magnesium joints are presented to demonstrate the high potential of the new gratingbased setup in the field of materials science. In addition, the results of an off-axis phase-contrast tomography of a human urethra with 15 mm in diameter are presented showing internal structures, which cannot be resolved by the conventional tomography in absorption mode.