Design, fabrication, and characterization of diffraction gratings for neutron phase contrast imaging

DOI PDF 6 Citations
  • C. Grünzweig
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • F. Pfeiffer
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • O. Bunk
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • T. Donath
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • G. Kühne
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • G. Frei
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • M. Dierolf
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland
  • C. David
    Paul Scherrer Institut, CH-5232 Villigen-PSI 1 , Switzerland

Description

<jats:p>We have developed a neutron phase contrast imaging method based on a grating interferometer setup. The principal constituents are two absorption gratings made of gadolinium and a phase modulating grating made of silicon. The design parameters of the setup, such as periodicity, structure heights of the gratings, and the distances between the gratings, are calculated. The fabrication of each grating is described in detail. The produced diffraction gratings were finally characterized within the setup, by locally evaluating the produced contrast (visibility) in each detector pixel, resulting in a visibility map over the whole grating size. An averaged value of 23% is achieved.</jats:p>

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