Imaging of Defects in Additively Manufactured Alloys Using Betatron X-Rays

2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI:10.1109/ICOPS45751.2022.9813025

V. Senthilkumaran, N. Beier, P. Shabaninezhad, J. Stinehart, S. Fourmaux, T. Richards, A. Arce-Borkent, S. Meschian, S. Knudsen, M. Lipsett, L. Zhou, J. Moore, A. Hussein

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Abstract

Betatron radiation is a synchrotron-like X-ray emission generated from the oscillations of trapped relativistic electrons during laser wakefield acceleration (LWFA). Betatron sources are broadband keV X-rays with small source sizes and few-femtosecond pulse durations, ideal for high-resolution phase contrast and X-ray imaging of dense materials. Here, we present the characterization (spatial resolution and acquisition time) of the betatron X-rays from different gases to study their ability for high-resolution imaging of micrometer-scale defects in additively manufactured (AM) aluminium-silicon alloys. Characterization of the X-ray source spectrum, spatial resolution, source size and betatron emission length was performed using the Advanced Laser Light Source in Varennes, Canada. Upcoming applications of these sources for high-resolution, high-throughput 3D tomography of porosity evolution of AM alloys under tension will be discussed.

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增材制造合金缺陷的电子射线成像

Betatron辐射是在激光尾流场加速(LWFA)过程中被捕获的相对论电子振荡产生的一种类似同步加速器的x射线辐射。Betatron源是宽带keV x射线，源尺寸小，脉冲持续时间短，是高分辨率相衬和致密材料x射线成像的理想选择。在这里，我们展示了来自不同气体的betatron x射线的表征(空间分辨率和采集时间)，以研究它们在增材制造(AM)铝硅合金中微米级缺陷的高分辨率成像能力。利用加拿大Varennes的先进激光光源，对x射线源光谱、空间分辨率、源尺寸和betatron发射长度进行了表征。将讨论这些源在高分辨率，高通量AM合金拉伸孔隙演化的3D断层扫描中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 IEEE International Conference on Plasma Science (ICOPS)

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