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

Rev. Sci. Instrum. 79, 053703 (2008); doi:10.1063/1.2930866

Published 23 May 2008

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C. Grünzweig,1 F. Pfeiffer,1,2 O. Bunk,1 T. Donath,1 G. Kühne,1 G. Frei,1 M. Dierolf,1 and C. David1
1Paul Scherrer Institut, CH-5232 Villigen-PSI, Switzerland
2Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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. ©2008 American Institute of Physics
History: Received 13 March 2008; accepted 28 April 2008; published 23 May 2008
Permalink: http://link.aip.org/link/?RSINAK/79/053703/1
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0034-6748 (print)   1089-7623 (online)
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REFERENCES (18)
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