Laser-wakefield accelerators for high-resolution X-ray imaging of complex microstructures

Title: Laser-wakefield accelerators for high-resolution X-ray imaging of complex microstructures
Authors: Hussein, AE
Senabulya, N
Ma, Y
Streeter, MJV
Kettle, B
Dann, SJD
Albert, F
Bourgeois, N
Cipiccia, S
Cole, JM
Finlay, O
Gerstmayr, E
Gonzalez, IG
Higginbotham, A
Jaroszynski, DA
Falk, K
Krushelnick, K
Lemos, N
Lopes, NC
Lumsdon, C
Lundh, O
Mangles, SPD
Najmudin, Z
Rajeev, PP
Schleputz, CM
Shahzad, M
Smid, M
Spesyvtsev, R
Symes, DR
Vieux, G
Willingale, L
Wood, JC
Shahani, AJ
Thomas, AGR
Item Type: Journal Article
Abstract: Laser-wakefield accelerators (LWFAs) are high acceleration-gradient plasma-based particle accelerators capable of producing ultra-relativistic electron beams. Within the strong focusing fields of the wakefield, accelerated electrons undergo betatron oscillations, emitting a bright pulse of X-rays with a micrometer-scale source size that may be used for imaging applications. Non-destructive X-ray phase contrast imaging and tomography of heterogeneous materials can provide insight into their processing, structure, and performance. To demonstrate the imaging capability of X-rays from an LWFA we have examined an irregular eutectic in the aluminum-silicon (Al-Si) system. The lamellar spacing of the Al-Si eutectic microstructure is on the order of a few micrometers, thus requiring high spatial resolution. We present comparisons between the sharpness and spatial resolution in phase contrast images of this eutectic alloy obtained via X-ray phase contrast imaging at the Swiss Light Source (SLS) synchrotron and X-ray projection microscopy via an LWFA source. An upper bound on the resolving power of 2.7 ± 0.3 μm of the LWFA source in this experiment was measured. These results indicate that betatron X-rays from laser wakefield acceleration can provide an alternative to conventional synchrotron sources for high resolution imaging of eutectics and, more broadly, complex microstructures.
Issue Date: 1-Mar-2019
Date of Acceptance: 29-Jan-2019
URI: http://hdl.handle.net/10044/1/71353
DOI: https://doi.org/10.1038/s41598-019-39845-4
ISSN: 2045-2322
Publisher: Nature Publishing Group
Start Page: 1
End Page: 13
Journal / Book Title: Scientific Reports
Volume: 9
Copyright Statement: © Te Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
ELECTRON ACCELERATION
GROWTH
PHASE
BEAMS
DATASETS
SYSTEMS
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
ELECTRON ACCELERATION
GROWTH
PHASE
BEAMS
DATASETS
SYSTEMS
Publication Status: Published
Article Number: ARTN 3249
Online Publication Date: 2019-03-01
Appears in Collections:Physics
Plasma Physics



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