High contrast femtosecond laser-driven intense hard X-ray source for imaging application
High contrast femtosecond laser-driven intense hard X-ray source for imaging application
复制标题
用于成像应用的高对比度飞秒激光驱动强硬 X 射线源
DOI：
10.1016/j.nima.2009.11.048
复制
发表时间：
2010-07-01
影响因子：
1.4
通讯作者：
Zhang, J.
中科院分区：
文献类型：
--
作者：
Chen, L. M.;Wang, W. M.;Zhang, J.
本文介绍了激光驱动硬x射线源在成像中的应用现状，特别是x射线转换效率的饱和和对成像质量的严重影响。通过采用高对比度激光脉冲，提高了固体箔靶x射线的转换效率，优化了光谱结构，适用于成像应用。此外，用超高对比度激光照射由气体喷射产生的Ar气团目标，产生了具有很少连续背景的明亮的Ar k壳x射线。这些改进显示了单次超快x射线成像的巨大潜力。(C) 2009 Elsevier B.V.版权所有
In this report we address the current situation of laser-driven hard X-ray sources for imaging applications, especially the saturation of X-ray conversion efficiency and the serious impact upon imaging quality. By employing high contrast laser pulses, the conversion efficiency to X-rays from solid foil targets is improved and the structure of the spectrum can be optimized with respect to imaging applications. In addition, bright Ar K-shell X-rays with very little continuum background have been generated by irradiating, with an ultra-high contrast laser, a target of Ar gas clusters created by a gas jet. These improvements show great potential for single-shot ultrafast X-ray imaging. (C) 2009 Elsevier B.V. All rights reserved.