Exploring spatial resolution enhancements on IMAT for steel corrosion studies

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-02-06 DOI:10.1016/j.nima.2025.170284

Vicky Ullas Mirashi , Winfried Kockelmann , Nikil Kapur , Anna Fedrigo , Manuel Morgano , Thawatchart Chulapakorn , Adrian Losko , Alexander Wolfertz , Anton S. Tremsin , Adriana Matamoros-Veloza

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Abstract

Neutron imaging offers benefits over X-rays for steel corrosion studies including deep penetration and high sensitivity to some light elements such as hydrogen. However, the resolution is frequently at or below the thickness of the corroded layer. This work demonstrates two approaches to enhance the spatial resolution on IMAT at the ISIS neutron source. The first approach shows that a fiber optics taper attached to an optical camera box for white beam imaging can achieve a spatial resolution down to 15 μm. The second approach uses event centroiding with a Timepix3-based detector for diffraction contrast imaging achieving a spatial resolution of 30 μm. These results support advances in corrosion and degradation studies of steel using neutron imaging.

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探索提高IMAT在钢腐蚀研究中的空间分辨率

与x射线相比，中子成像在钢铁腐蚀研究中具有更大的优势，包括深度穿透和对氢等轻元素的高灵敏度。然而，分辨率往往等于或低于腐蚀层的厚度。本研究展示了两种提高ISIS中子源IMAT空间分辨率的方法。第一种方法表明，将光纤锥连接到用于白束成像的光学相机盒上，可以实现低至15 μm的空间分辨率。第二种方法使用事件质心和基于timepix3的探测器进行衍射对比成像，实现30 μm的空间分辨率。这些结果支持了利用中子成像技术研究钢的腐蚀和降解的进展。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.