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X-ray grating interferometer for imaging at asecond-generation synchrotron radiation source

文献类型： 会议论文

第一作者： Julia Herzen

作者： Julia Herzen 1 ; Felix Beckmann 1 ; Tilman Donath 2 ; Malte Ogurreck 1 ; Christian David 3 ; Franz Pfeiffer 4 ; Jurgen Mohr 5 ; Elena Reznikova 5 ; Stefan Riekehr 1 ; Astrid Haibel 6 ; GeorgSchulz 6 ; Bert Muller 1 ; Andreas Schreyer;

作者机构： 1.GKSS Research Centre, Geesthacht, Germany

2.Dectris AG, Baden, Switzerland

3.Paul Scherrer Institut, Villigen PSI, Switzerland

4.Technische Universitat Munchen, Munich, Germany

5.Karlsruhe Institute of Technology, Karlsruhe, Germany

6.Biomaterials Science Center, University of Basel, Switzerland

关键词： Phase contrast;synchrotron radiation;grating interferometer;materials science;laser-beam weld;soft-tissue imaging

会议名称： SPIE Conference on Developments in X-ray Tomography

主办单位：

页码： 780407:1-780407:10

摘要： 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 bnilliant 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 grating-based 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.

分类号： N-532

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