Effect of Scattering Correction in Neutron Imaging of Hydrogenous Samples using the Black Body Approach

Effect of Scattering Correction in Neutron Imaging of Hydrogenous Samples using the Black Body Approach

Chiara Carminati, Pierre Boillat, Sarah Laemmlein, Petra Heckova, Michal Snehota, David Mannes, Jan Hovind, Markus Strobl, Anders Kaestner

Abstract. The “black body” (BB) method is an experimental approach aiming at correcting scattering artifacts and systematic biases from neutron imaging experiments. It is based on the acquisition of reference images, obtained with an interposed grid of neutron absorbers (BB), from which the background including contaminations of scattering from the sample can be extrapolated. We evaluate in this paper the effect of the BB correction on two experimental datasets acquired with different setups at the NEUTRA and ICON beamlines at the Paul Scherrer Institut. With the two experiments we demonstrate the efficient utilization of the method for 2D as well as 3D data and in particular for kinetic studies. In the first dataset, differently varnished wood samples are studied through time resolved kinetic neutron radiography to evaluate the change in wood moisture content due to changes in relative humidity. In the second case study, engineered soil sample simulating a small experimental bioretention cell with rainfall, also known as rain garden, is imaged through on-the-fly neutron tomography.

Keywords
Scattering Artefacts, Systematic Biases, Quantitative Neutron Imaging

Published online 1/5/2020, 6 pages
Copyright © 2020 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Chiara Carminati, Pierre Boillat, Sarah Laemmlein, Petra Heckova, Michal Snehota, David Mannes, Jan Hovind, Markus Strobl, Anders Kaestner, Effect of Scattering Correction in Neutron Imaging of Hydrogenous Samples using the Black Body Approach, Materials Research Proceedings, Vol. 15, pp 174-179, 2020

DOI: https://doi.org/10.21741/9781644900574-27

The article was published as article 27 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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