Neutron Dark-Field Imaging and Grating Interferometry

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (10 December 2021) | Viewed by 7177

Special Issue Editors


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Guest Editor
Neutron Imaging and Applied Materials Group, Paul Scherrer Institute, 5232 Villigen, Switzerland
Interests: neutron imaging; neutron scattering; neutron instrumentation; neutron diffraction; grating iterferometry; dark-field contrast; polarized neutrons; engineering materials; soft matter

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Guest Editor
School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Korea
Interests: neutron imaging

Special Issue Information

Grating Interferometry for neutron imaging was first introduced with the Talbot–Lau interferometer on a dedicated neutron imaging instrument more than a decade ago. The shortly thereafter explored dark-field contrast imaging, which is one of the imaging modalities enabled by the interferometer, has triggered numerous outstanding developments, applications, and studies in many fields of material science, ranging from magnetism and engineering materials research to soft condensed matter. Grating interferometers have been installed at nearly all leading facilities around the world, and various implementations, including conventional Talbot–Lau setups, symmetric geometries, and far-field iterferometers, to name but a few, have been explored. While differential phase contrast and qualitative dark-field contrast imaging have mainly been exploited in magnetism, revealing magnetic domain structures and transformations in bulk ferromagnets and superconductors, quantitative dark-field imaging has enabled local microstructural studies in applied materials science. The pace of progress in this field is fast and the number of publications is growing quickly.

We are, thus, inviting the submission of manuscripts to a Special Issue on “Neutron Dark-Field Imaging and Grating Interferometry”. This Special Issue aims to cover all aspects of neutron grating iterferometry and dark-field contrast imaging, including technical advances, instrumentation, and, in particular, seminal applications in material science.

Prof. Dr. Markus Strobl
Prof. Seung Wook Lee
Guest Editors

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Keywords

  • neutron grating interferometry
  • dark-field contrast
  • spatially resolved small-angle neutron scattering
  • differential phase contrast
  • dark-field retrieval and quantification
  • imaging software
  • engineerig materials
  • soft matter
  • magnetism

Published Papers (3 papers)

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Research

7 pages, 3098 KiB  
Article
Cold and Thermal Neutron Single Grating Dark-Field Imaging Extended to an Inverse Pattern Regime
by Matteo Busi, Marie-Christine Zdora, Jacopo Valsecchi, Michael Bacak and Markus Strobl
Appl. Sci. 2022, 12(6), 2798; https://doi.org/10.3390/app12062798 - 9 Mar 2022
Cited by 1 | Viewed by 1427
Abstract
Neutron dark-field imaging is a powerful tool for the spatially resolved characterization of microstructural features of materials and components. Recently, a novel achromatic technique based on a single absorption grating for the concurrent measurement of attenuation, dark-field and differential phase contrast was introduced. [...] Read more.
Neutron dark-field imaging is a powerful tool for the spatially resolved characterization of microstructural features of materials and components. Recently, a novel achromatic technique based on a single absorption grating for the concurrent measurement of attenuation, dark-field and differential phase contrast was introduced. However, the range of measurable length scales of the technique in quantitative dark-field measurements appeared limited to some 10–100 nanometers, due to the relatively high spatial resolution requirement to detect the projected beam modulation. Here, we show how using grating–detector distances beyond the resolution limit for a given collimation produces a sequence of inverse and regular projection patterns and, thus, leads to a significant extension of the range of accessible length scales probed by dark-field imaging. In addition, we show that this concept can also be applied to 2D grating structures, which will enable concurrent three-fold directional dark-field measurements at a wide range of length scales. The approach is demonstrated with measurements on an electrical steel sheet sample, which confirm the validity of combining the results from the regular and inverse grating patterns. Full article
(This article belongs to the Special Issue Neutron Dark-Field Imaging and Grating Interferometry)
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15 pages, 5457 KiB  
Article
Intact, Commercial Lithium-Polymer Batteries: Spatially Resolved Grating-Based Interferometry Imaging, Bragg Edge Imaging, and Neutron Diffraction
by Adam J. Brooks, Daniel S. Hussey, Kyungmin Ham, David L. Jacobson, Ingo Manke, Nikolay Kardjilov and Leslie G. Butler
Appl. Sci. 2022, 12(3), 1281; https://doi.org/10.3390/app12031281 - 25 Jan 2022
Cited by 3 | Viewed by 2509
Abstract
We survey several neutron imaging and diffraction methods for non-destructive testing and evaluation of intact, commercial lithium-ion batteries. Specifically, far-field interferometry was explored as an option to probe a wide range of autocorrelation lengths within the batteries via neutron imaging. The dark-field interferometry [...] Read more.
We survey several neutron imaging and diffraction methods for non-destructive testing and evaluation of intact, commercial lithium-ion batteries. Specifically, far-field interferometry was explored as an option to probe a wide range of autocorrelation lengths within the batteries via neutron imaging. The dark-field interferometry images change remarkably from fresh to worn batteries, and from charged to discharged batteries. When attempting to search for visual evidence of battery degradation, neutron Talbot-Lau grating interferometry exposed battery layering and particle scattering through dark-field imaging. Bragg edge imaging also reveals battery wear and state of charge. Neutron diffraction observed chemical changes between fresh and worn, charged and discharged batteries. However, the utility of these methods, for commercial batteries, is dependent upon battery size and shape, with 19 to 43 mAh prismatic batteries proving most convenient for these experimental methods. This study reports some of the first spatially resolved, small angle scattering (dark-field) images showing battery degradation. Full article
(This article belongs to the Special Issue Neutron Dark-Field Imaging and Grating Interferometry)
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13 pages, 2550 KiB  
Article
Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study
by Youngju Kim, Jacopo Valsecchi, Ohsung Oh, Jongyul Kim, Seung Wook Lee, Francois Boue, Evelyne Lutton, Matteo Busi, Christopher Garvey and Markus Strobl
Appl. Sci. 2022, 12(2), 833; https://doi.org/10.3390/app12020833 - 14 Jan 2022
Cited by 9 | Viewed by 2322
Abstract
Scattering studies of milk and milk products, which are highly relevant food products on the global market, are often utilized and reported in literature to investigate and understand the subtle microscopic structural differences between dairy samples. These structural features determine the physical properties [...] Read more.
Scattering studies of milk and milk products, which are highly relevant food products on the global market, are often utilized and reported in literature to investigate and understand the subtle microscopic structural differences between dairy samples. These structural features determine the physical properties and ultimately the texture of milk products and, thus, also influence the consumer’s experience. Small-angle neutron scattering is a prominent example, which enables observations of length scales, which convey proteins and fat globules in food-grade milk. In addition, deuteration enables contrast variations between the constituents of dairy products. In this study, we investigate the potential of probing small-angle neutron scattering from milk samples through quantitative neutron dark-field imaging using grating interferometry, to establish the feasibility of studying, in particular, fat globules and milk gel structures with this spatially resolved scattering technique. Full article
(This article belongs to the Special Issue Neutron Dark-Field Imaging and Grating Interferometry)
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