Ultrafast Imaging of Laser Driven Shock Waves using Betatron X-rays from a Laser Wakefield Accelerator.
Ultrafast Imaging of Laser Driven Shock Waves using Betatron X-rays from a Laser Wakefield Accelerator.
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DOI：
10.1038/s41598-018-29347-0
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发表时间：
2018-07-20
影响因子：
4.6
通讯作者：
Mangles SPD
中科院分区：
文献类型：
--
作者：
Wood JC;Chapman DJ;Poder K;Lopes NC;Rutherford ME;White TG;Albert F;Behm KT;Booth N;Bryant JSJ;Foster PS;Glenzer S;Hill E;Krushelnick K;Najmudin Z;Pollock BB;Rose S;Schumaker W;Scott RHH;Sherlock M;Thomas AGR;Zhao Z;Eakins DE;Mangles SPD
来自激光韦克菲尔德加速器的贝塔管辐射是一种超短脉冲硬X射线源，类似于同步加速器。它来自一个厘米级的等离子体加速器，产生GeV级的电子束。近年来，电子感应加速器辐射已发展成为一种独特的来源，能够产生高分辨率的X射线图像在紧凑的几何形状。然而，直到现在，这种辐射的短脉冲性质还没有被利用。这份报告详细介绍了第一个实验，利用电子感应加速器辐射图像的快速发展的现象，用它来射线照相的激光驱动冲击波在硅目标。图像的空间分辨率与在传统同步加速器光源的类似实验中取得的结果相当。感应加速器辐射的固有时间分辨率低于100 fs，这表明未来可以在不影响空间分辨率的情况下探测更快的过程。冲击速度和材料密度的定量测量，从冲击压缩过程中记录的射线照片，并与建立的硅的冲击响应，确定与传统的测速方法是一致的。这表明，未来的紧凑型电子感应加速器成像光束线可能是有用的成像和诊断高能量密度物理实验。
Betatron radiation from laser wakefield accelerators is an ultrashort pulsed source of hard, synchrotron-like x-ray radiation. It emanates from a centimetre scale plasma accelerator producing GeV level electron beams. In recent years betatron radiation has been developed as a unique source capable of producing high resolution x-ray images in compact geometries. However, until now, the short pulse nature of this radiation has not been exploited. This report details the first experiment to utilize betatron radiation to image a rapidly evolving phenomenon by using it to radiograph a laser driven shock wave in a silicon target. The spatial resolution of the image is comparable to what has been achieved in similar experiments at conventional synchrotron light sources. The intrinsic temporal resolution of betatron radiation is below 100 fs, indicating that significantly faster processes could be probed in future without compromising spatial resolution. Quantitative measurements of the shock velocity and material density were made from the radiographs recorded during shock compression and were consistent with the established shock response of silicon, as determined with traditional velocimetry approaches. This suggests that future compact betatron imaging beamlines could be useful in the imaging and diagnosis of high-energy-density physics experiments.
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影响因子：
3.2
作者：
BARKER, LM;HOLLENBACH, RE
通讯作者：
HOLLENBACH, RE
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作者：
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通讯作者：
Froula, D. H.