Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry

IF 5.2 1区 物理与天体物理 Q1 OPTICS High Power Laser Science and Engineering Pub Date : 2023-05-26 DOI:10.1017/hpl.2023.44
G. Pérez-Callejo, V. Bouffetier, L. Ceurvorst, T. Goudal, S. Klein, D. Svyatskiy, M. Holec, P. Perez-Martin, K. Falk, A. Casner, T. Weber, G. Kagan, M. Valdivia
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引用次数: 1

Abstract

Abstract Diagnosing the evolution of laser-generated high energy density (HED) systems is fundamental to develop a correct understanding of the behavior of matter under extreme conditions. Talbot–Lau interferometry constitutes a promising tool, since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense plasmas. We present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot–Lau X-ray interferometer. A polystyrene (CH) foil was irradiated by a laser of 133 J, 1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser (153 J, 11 ps). The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using phase-stepping. We managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above ${10}^{22}\;{\mathrm{cm}}^{-3}$ . These results showcase the capabilities of Talbot–Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.
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使用步进x射线塔尔博特-劳偏转计的欧米茄EP设施辐照箔的相位成像
诊断激光产生的高能量密度(HED)系统的演化是正确理解极端条件下物质行为的基础。塔尔博特-劳干涉测量法是一种很有前途的工具,因为它可以同时对致密等离子体进行单次x射线成像和相衬成像。我们在欧米茄EP上展示了一个实验的结果,该实验旨在用塔尔博特-劳x射线干涉仪探测激光照射箔的烧蚀前沿。用133j, 1ns的激光照射聚苯乙烯(CH)箔,用153j, 11ps的短脉冲激光驱动铜箔产生的8kev背光辐射探测。利用相位步进法将烧蚀前干涉图与一组非原位获取的参考图像结合处理。我们成功地获得了电子密度大于${10}^{22}\;{\ maththrm {cm}}^{-3}$的激光辐照箔的衰减和相移图像。这些结果展示了Talbot-Lau x射线诊断方法通过高分辨率成像诊断HED激光产生的等离子体的能力。
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来源期刊
High Power Laser Science and Engineering
High Power Laser Science and Engineering Physics and Astronomy-Nuclear and High Energy Physics
CiteScore
7.10
自引率
4.20%
发文量
401
审稿时长
21 weeks
期刊介绍: High Power Laser Science and Engineering (HPLaser) is an international, peer-reviewed open access journal which focuses on all aspects of high power laser science and engineering. HPLaser publishes research that seeks to uncover the underlying science and engineering in the fields of high energy density physics, high power lasers, advanced laser technology and applications and laser components. Topics covered include laser-plasma interaction, ultra-intense ultra-short pulse laser interaction with matter, attosecond physics, laser design, modelling and optimization, laser amplifiers, nonlinear optics, laser engineering, optical materials, optical devices, fiber lasers, diode-pumped solid state lasers and excimer lasers.
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