皮秒激光驱动X光源空间分辨特性研究
Investigation on spatial-resolution characteristics of X-ray source driven by ps-laser
王洪建 1冯永祯 2罗笔瀚 2张绍军 3刘红杰4
作者信息
- 1. 重庆工商大学智能装备绿色设计与制造重庆市重点实验室,重庆 400067;重庆工商大学机器人与激光智能制造研究所,重庆 400067
- 2. 重庆工商大学机器人与激光智能制造研究所,重庆 400067
- 3. 重庆工商大学智能装备绿色设计与制造重庆市重点实验室,重庆 400067
- 4. 中国工程物理研究院激光聚变研究中心,四川绵阳 621900
- 折叠
摘要
为提高皮秒激光驱动丝靶产生X射线强度,率先提出了皮秒激光辐照自持独立丝靶侧面辐射产生的X光源对静态台阶靶客体背光照相方法,并在中国工程物理研究院"星光-Ⅲ"激光装置上进行实验研究.利用皮秒激光以靶法线30°方向入射,分别与直径10 μm的钼(Mo)丝和金(Au)丝靶相互作用产生X光源,并通过多孔阵列和CCD相机测量X光源焦斑.获取的X光源焦斑的最小横向尺寸约为20 μm,纵向尺寸约为10 μm,静态客体成像的最佳空间分辨率接近～11 μm,与丝靶的直径相当.实验结果表明:采用自持独立丝靶侧面能够获得强穿透性的微焦点X光源,可为高能密度物质动态过程诊断等研究应用提供参考.
Abstract
In order to improve the X-ray intensity of wire target driven by picosecond laser,a method of backlighting of static step wedge target by X-ray source generated by picosecond laser irradiating side radiation of self-sustaining independent wire target is proposed firstly,and experimental research is carried out on picosecond beam of the XGⅢ laser facility,China Academy of Engineering Physics.In this method,a picosecond laser is used to incident at 30°away from the target normal,and the X-ray source is generated by interacting of a laser with molybdenum and gold wire targets with a diameter of 10 μm.The X-ray source focal spot is measured by a multi-hole array pinhole and a CCD camera.The minimum transverse size of the focal spot of the X-ray source obtained is about 20 μm,and the longitudinal size is about 10 μm.The optimal spatial resolution of static target imaging is close to～11 μm,which is comparable to the diameter of the wire target.The experimental results show that using the self-sustaining independent wire target side can obtain strong penetrability microfocus X-ray source.This method can provide reference for the research and application of high-energy density material dynamic process diagnosis.
关键词
皮秒激光/X射线/背光照相/空间分辨率/微丝靶Key words
picosecond(ps)laser/X-ray/backlight radiography/spatial resolution/microwire target引用本文复制引用
出版年
2024
NETL
NSTL
万方数据