PSI ‘Neutron Microscope’ at ILL-D50 Beamline – First Results

PSI ‘Neutron Microscope’ at ILL-D50 Beamline – First Results

Pavel Trtik, Michael Meyer, Timon Wehmann, Alessandro Tengattini, Duncan Atkins, E.H. Lehmann, Markus Strobl

Abstract. A high-resolution neutron imaging system referred to as ‘Neutron Microscope’ (NM) has been recently established as a piece of instrumental equipment at the Paul Scherrer Institut (PSI), Switzerland. It is providing the wide user community of the Neutron Imaging and Applied Materials Group (NIAG) with the capability of spatial image resolution below 5 µm at effective pixel sizes of 1.3 m. The NM has been designed as a portable, self-contained system that can be moved between beamlines at PSI with only moderate effort. In this contribution, we report on the first results and experience with the Neutron Microscope externally, at a beamline of another neutron source outside the Swiss Spallation Neutron Source (SINQ). In June 2018, NM has been transported to the Institute Laue-Langevin (ILL) and was successfully installed at the D50 beamline for four days. A gadolinium based Siemens star produced at PSI has been used for the assessment of the spatial resolution. The spatial resolution achieved using the Neutron Microscope at ILL-D50 equalled 4.5 µm. Above that, several high-resolution tomographies of various samples were acquired, of which an illustrative example is presented.

Keywords
Neutron, Microscope, High-Resolution Neutron Imaging, Cold Neutrons, Beam Intensity

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: Pavel Trtik, Michael Meyer, Timon Wehmann, Alessandro Tengattini, Duncan Atkins, E.H. Lehmann, Markus Strobl, PSI ‘Neutron Microscope’ at ILL-D50 Beamline – First Results, Materials Research Proceedings, Vol. 15, pp 23-28, 2020

DOI: https://doi.org/10.21741/9781644900574-4

The article was published as article 4 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.

References
[1] P. Boillat, E. H. Lehmann, P. Trtik, and M. Cochet, “Neutron imaging of fuel cells – Recent trends and future prospects,” Curr. Opin. Electrochem., vol. 5, no. 1, 2017. https://doi.org/10.1016/j.coelec.2017.07.012
[2] F. Krejci et al., “Development and characterization of high-resolution neutron pixel detectors based on Timepix read-out chips,” J. Instrum., vol. 11, no. 12, 2016. https://doi.org/10.1088/1748-0221/11/12/C12026
[3] A. Faenov et al., “Lithium fluoride crystal as a novel high dynamic neutron imaging detector with microns scale spatial resolution,” Phys. Status Solidi Curr. Top. Solid State Phys., vol. 9, no. 12, 2012. https://doi.org/10.1002/pssc.201200185
[4] A. S. Tremsin et al., “High resolution neutron imaging capabilities at BOA beamline at Paul Scherrer Institut,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 784, 2015. https://doi.org/10.1016/j.nima.2014.09.026
[5] S. H. Williams et al., “Detection system for microimaging with neutrons,” J. Instrum., vol. 7, no. 2, 2012. https://doi.org/10.1088/1748-0221/7/02/P02014
[6] D. S. Hussey, J. M. LaManna, E. Baltic, and D. L. Jacobson, “Neutron imaging detector with 2 μm spatial resolution based on event reconstruction of neutron capture in gadolinium oxysulfide scintillators,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., 2017. https://doi.org/10.1016/j.nima.2017.05.035
[7] M. Morgano, P. Trtik, M. Meyer, E. H. Lehmann, J. Hovind, and M. Strobl, “Unlocking high spatial resolution in neutron imaging through an add-on fibre optics taper,” Opt. Express, vol. 26, no. 2, 2018. https://doi.org/10.1364/OE.26.001809
[8] P. Trtik et al., “Improving the Spatial Resolution of Neutron Imaging at Paul Scherrer Institut – The Neutron Microscope Project,” in Physics Procedia, 2015, vol. 69. https://doi.org/10.1016/j.phpro.2015.07.024
[9] P. Trtik and E. H. Lehmann, “Isotopically-enriched gadolinium-157 oxysulfide scintillator screens for the high-resolution neutron imaging,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 788, 2015. https://doi.org/10.1016/j.nima.2015.03.076
[10] P. Trtik and E. H. Lehmann, “Progress in High-resolution Neutron Imaging at the Paul Scherrer Institut-The Neutron Microscope Project,” J. Phys. Conf. Ser., vol. 746, no. 1, 2016. https://doi.org/10.1088/1742-6596/746/1/012004
[11] M. Grosse and N. Kardjilov, “Which Resolution can be Achieved in Practice in Neutron Imaging Experiments? – A General View and Application on the Zr – ZrH2and ZrO2- ZrN Systems,” in Physics Procedia, 2017. https://doi.org/10.1016/j.phpro.2017.06.037
[12] M. Grosse, P. Trtik, and B. Schillinger, in preparation
[13] P. Trtik, “Neutron microtomography of voids in gold,” MethodsX, vol. 4, 2017. https://doi.org/10.1016/j.mex.2017.11.009
[14] M. Morgano, S. Peetermans, E. H. Lehmann, T. Panzner, and U. Filges, “Neutron imaging options at the BOA beamline at Paul Scherrer Institut,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 754, pp. 46–56, 2014. https://doi.org/10.1016/j.nima.2014.03.055
[15] D. Dauti, A. Tengattini, S. Dal Pont, N. Toropovs, M. Briffaut, and B. Weber, “Analysis of moisture migration in concrete at high temperature through in-situ neutron tomography,” Cem. Concr. Res., no. 111, pp. 41–55, 2018. https://doi.org/10.1016/j.cemconres.2018.06.010
[16] C. Grünzweig, G. Frei, E. Lehmann, G. Kühne, and C. David, “Highly absorbing gadolinium test device to characterize the performance of neutron imaging detector systems,” Rev. Sci. Instrum., vol. 78, no. 5, 2007. https://doi.org/10.1063/1.2736892
[17] J. Crha, “Light Yield Enhancement of 157-Gadolinium Oxysulfide Scintillator Screens for the High-Resolution Neutron Imaging,” MehtodsX, vol. 6., pp. 107-114. https://doi.org/10.1016/j.mex.2018.12.005
[18] M. Van Heel and M. Schatz, “Fourier shell correlation threshold criteria,” J. Struct. Biol., vol. 151, no. 3, 2005. https://doi.org/10.1016/j.jsb.2005.05.009
[19] W. Gong, P. Trtik, S. Valance, and J. Bertsch, “Hydrogen diffusion under stress in Zircaloy: High-resolution neutron radiography and finite element modeling,” J. Nucl. Mater., vol. 508, pp. 459–464, 2018. https://doi.org/10.1016/j.jnucmat.2018.05.079
[20] M. Medarde et al., “Lead–gold eutectic: An alternative liquid target material candidate for high power spallation neutron sources,” J. Nucl. Mater., vol. 411, no. 1, pp. 72–82, 2011. https://doi.org/10.1016/j.jnucmat.2011.01.034
[21] P. Boillat et al., “Chasing quantitative biases in neutron imaging with scintillator-camera detectors: A practical method with black body grids,” Opt. Express, vol. 26, no. 12, 2018. https://doi.org/10.1364/OE.26.015769
[22] P. Trtik et al., “Release of internal curing water from lightweight aggregates in cement paste investigated by neutron and X-ray tomography,” Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip., vol. 651, no. 1, 2011. https://doi.org/10.1016/j.nima.2011.02.012
[23] J. Terreni et al., “Observing Chemical Reactions by Time-Resolved High-Resolution Neutron Imaging,” J. Phys. Chem. C, vol. 122, no. 41, pp. 23574–23581, 2018. https://doi.org/10.1021/acs.jpcc.8b07321
[24] M. Yamada et al., “Pulsed neutron-beam focusing by modulating a permanent-magnet sextupole lens”, Progress Theoret Experim Phys. no. 4, 2015, 043G01. https://doi.org/10.1093/ptep/ptv015