X-ray grating interferometer for materials-science imaging at a low-coherent wiggler source

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3662411· OSTI ID:22063752

Herzen, Julia ^[1]; Donath, Tilman ^[2]; Dectris AG, 5400 Baden ^[3]; Beckmann, Felix; Ogurreck, Malte; Schreyer, Andreas ^[1]; David, Christian ^[2]; Mohr, Juergen ^[4]; Pfeiffer, Franz ^[5]

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1. Helmholtz-Zentrum Geesthacht, 21502 Geesthacht (Germany)
2. Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)
3. Switzerland
4. Institute of Microstructure Technology, Forschungszentrum Karlsruhe, 76021 Karlsruhe (Germany)
5. Physics Department and Institute for Medical Engineering, Technische Universitaet Muenchen, 85748 Garching (Germany)

X-ray phase-contrast radiography and tomography enable to increase contrast for weakly absorbing materials. Recently, x-ray grating interferometers were developed that extend the possibility of phase-contrast imaging from highly brilliant radiation sources like third-generation synchrotron sources to non-coherent conventional x-ray tube sources. Here, we present the first installation of a three grating x-ray interferometer at a low-coherence wiggler source at the beamline W2 (HARWI II) operated by the Helmholtz-Zentrum Geesthacht at the second-generation synchrotron storage ring DORIS (DESY, Hamburg, Germany). Using this type of the wiggler insertion device with a millimeter-sized source allows monochromatic phase-contrast imaging of centimeter sized objects with high photon flux. Thus, biological and materials-science imaging applications can highly profit from this imaging modality. The specially designed grating interferometer currently works in the photon energy range from 22 to 30 keV, and the range will be increased by using adapted x-ray optical gratings. Our results of an energy-dependent visibility measurement in comparison to corresponding simulations demonstrate the performance of the new setup.

• OSTI ID: 22063752
• Journal Information: Review of Scientific Instruments, Vol. 82, Issue 11; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
43 PARTICLE ACCELERATORS
DESY
DIFFRACTION GRATINGS
DORIS STORAGE RING
ENERGY DEPENDENCE
INTERFEROMETERS
KEV RANGE
LIGHT SOURCES
MONOCHROMATIC RADIATION
PERFORMANCE
PHOTONS
SIMULATION
SYNCHROTRON RADIATION SOURCES
TOMOGRAPHY
VISIBLE RADIATION
X RADIATION
X-RAY TUBES