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基于电磁辐射的内爆物理实验时序诊断

Time Sequence Diagnosis of Implosion Physics Experiment Based on Electromagnetic Radiation

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摘要

在内爆物理实验中, 多组激光脉冲在不同时刻与靶相互作用, 产生若干瞬态物理过程。准确诊断这些激光与靶作用产生的瞬态过程之间的时序关系, 对于成功获取实验状态的相关参数非常重要。提出了一种基于电磁辐射的内爆物理实验时序诊断方法, 利用激光与金属靶相互作用时会产生强烈的电磁脉冲辐射, 可获得不同激光与靶作用过程的时序关系, 为判断和控制不同激光与靶作用过程之间的时序提供重要依据。在神光III主机大型激光装置上进行的实验测试表明, 基于电磁辐射的内爆物理实验时序诊断方法可以准确确定预脉冲激光、主脉冲激光以及背光激光等与腔靶和平面背光靶之间作用的时序关系。该方法具有操作简单, 测量精度高的优点, 对于精确把握激光与靶相互作用过程的时间关系, 提升实验精度有着重要意义。

Abstract

In the implosion physics experiment, several groups of laser pulses interact with the target at different times and produce several transient physical processes. Accurately diagnosing the time sequence relationship between these lasers and the transient process generated by the laser and the target is very important for successfully obtaining the relevant parameters of the experimental state. A time sequence diagnosis method of implosion physics experiment based on the electromagnetic radiation is proposed. It can produce intense electromagnetic pulse radiation when the laser is interacting with metal targets. The time sequence relationship between different lasers and target action processes can be obtained. It provides an important basis for judging and controlling the time sequence between different lasers and target actions. The experimental tests on Shenguang III host large laser devices show that the time sequence diagnosis method of the implosion physical experiment based on the electromagnetic radiation can accurately determine the time sequence relationship between the preliminary pulse laser, the main pulse laser and the interaction between backlight laser and cavity target and flat backlight target. This method has the advantages of simple operation and high measurement precision. It is of great significance to accurately grasp the time relationship between laser and target interaction and improve experimental accuracy.

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中图分类号:O536

DOI:10.3788/cjl201845.0704007

所属栏目:测量与计量

基金项目:中南大学2017年研究生自主探索创新项目(2017zzts320)

收稿日期:2018-01-24

修改稿日期:2018-03-07

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严颖:中南大学物理与电子学院超微结构与超快过程湖南省重点实验室, 湖南 长沙 410083中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
江少恩:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
易涛:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
易有根:中南大学物理与电子学院超微结构与超快过程湖南省重点实验室, 湖南 长沙 410083
丁永坤:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900

联系人作者:易有根(yougenyi@csu.edu.cn)

备注:严颖(1993-), 女, 硕士研究生, 主要从事强激光与靶作用产生电磁脉冲诊断方面的研究。E-mail: 17708488535@163.com

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引用该论文

Yan Ying,Jiang Shaoen,Yi Tao,Yi Yougen,Ding Yongkun. Time Sequence Diagnosis of Implosion Physics Experiment Based on Electromagnetic Radiation[J]. Chinese Journal of Lasers, 2018, 45(7): 0704007

严颖,江少恩,易涛,易有根,丁永坤. 基于电磁辐射的内爆物理实验时序诊断[J]. 中国激光, 2018, 45(7): 0704007

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