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20 September 2010 X-ray grating interferometer for imaging at a second-generation synchrotron radiation source
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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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Julia Herzen, Felix Beckmann, Tilman Donath, Malte Ogurreck, Christian David, Franz Pfeiffer, Jürgen Mohr, Elena Reznikova, Stefan Riekehr, Astrid Haibel, Georg Schulz, Bert Müller, and Andreas Schreyer "X-ray grating interferometer for imaging at a second-generation synchrotron radiation source", Proc. SPIE 7804, Developments in X-Ray Tomography VII, 780407 (20 September 2010);

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