Origin of Pseudo-Variation in High Resolution Neutron Grating Interferometry

Origin of Pseudo-Variation in High Resolution Neutron Grating Interferometry

Tobias Neuwirth, Michael Schulz, Peter Böni

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Abstract. During neutron grating interferometry measurements with a highly collimated neutron beam a pseudo-variation becomes visible in the acquired data. This pseudo-variation prevents the quantitative analysis of the acquired data, as the measured dark field data depends now on both the ultra-small-angle scattering as well as the properties leading to the pseudo-variation. In the following, the origin of this variation and dependence on the collimation of the neutron beam is explained. It will be shown how by changing the stepped grating in an interferometry scan this variation can be eliminated.

Neutron Imaging, Neutron Grating Interferometry, Quantitative nGI

Published online 1/5/2020, 7 pages
Copyright © 2020 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Tobias Neuwirth, Michael Schulz, Peter Böni, Origin of Pseudo-Variation in High Resolution Neutron Grating Interferometry, Materials Research Proceedings, Vol. 15, pp 129-135, 2020

DOI: https://doi.org/10.21741/9781644900574-20

The article was published as article 20 of the book Neutron Radiography

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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