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纳秒激光驱动的数千电子伏特 X射线背光面源特性

Characteristics of Multi-keV X-Ray Area Backlighting Sources Driven by Nanosecond Laser

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摘要

数千电子伏特(Multi-keV)量级的X射线背光成像是高能密度等离子体物理实验中常用的一种诊断技术。在神光II激光装置上, 研究了纳秒激光驱动钛4.7 keV波段及氯2.7 keV波段背光面源的性能。研究结果表明, 氯背光能谱以类He线及类H线为主, 其中2.7 keV波段的类He-α线最强; 在当前神光II激光加载能力下, 氯背光面源相对强度超过钛背光面源一个量级, 因此, 可选用氯He-α线的X光探针进行背光诊断。

Abstract

Multi-keV X-rays are used as backlighting sources of the radiography to diagnose plasmas in high energy density physics (HEDP) experiments. We study the characteristics of Ti-4.7 keV and Cl-2.7 keV X-rays driven by nanosecond laser at the SG-II laser facility. The results show that the X-rays from Cl plasma are primarily He-like and H-like line radiation, with 2.7 keV He-α line on the strongest line emission. In addition, the relative intensity of Cl X-rays is more than an order of magnitude compared to that of Ti X-rays under the current SG-II laser conditions. Therefore, the Cl X-rays can be used as the backlighting diagnosis.

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中图分类号:O536;O434

DOI:10.3788/CJL201744.0901011

所属栏目:激光器件与激光物理

基金项目:国家自然科学基金(61475146)

收稿日期:2017-04-26

修改稿日期:2017-05-08

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作者单位    点击查看

熊俊:中国工程物理研究院上海激光等离子体研究所, 上海 201800
安红海:中国工程物理研究院上海激光等离子体研究所, 上海 201800
贾果:中国工程物理研究院上海激光等离子体研究所, 上海 201800
王伟:中国工程物理研究院上海激光等离子体研究所, 上海 201800
王琛:中国工程物理研究院上海激光等离子体研究所, 上海 201800
王瑞荣:中国工程物理研究院上海激光等离子体研究所, 上海 201800
方智恒:中国工程物理研究院上海激光等离子体研究所, 上海 201800
董佳钦:中国工程物理研究院上海激光等离子体研究所, 上海 201800
雷安乐:中国工程物理研究院上海激光等离子体研究所, 上海 201800

联系人作者:熊俊(51854037@qq.com)

备注:熊俊(1981-), 男, 硕士, 助理研究员, 主要从事强激光驱动辐射源实验方面的研究。

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引用该论文

Xiong Jun,An Honghai,Jia Guo,Wang Wei,Wang Chen,Wang Ruirong,Fang Zhiheng,Dong Jiaqin,Lei Anle. Characteristics of Multi-keV X-Ray Area Backlighting Sources Driven by Nanosecond Laser[J]. Chinese Journal of Lasers, 2017, 44(9): 0901011

熊俊,安红海,贾果,王伟,王琛,王瑞荣,方智恒,董佳钦,雷安乐. 纳秒激光驱动的数千电子伏特 X射线背光面源特性[J]. 中国激光, 2017, 44(9): 0901011

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