高能电子成像对高功率激光与金属固体靶相互作用超快动态成像的实验研究

项目名称： 高能电子成像对高功率激光与金属固体靶相互作用超快动态成像的实验研究

项目编号： No.11505251

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 赵全堂

作者单位： 中国科学院近代物理研究所

项目金额： 23万元

中文摘要： 高能电子成像视为高能量密度物理（HEDP）及惯性约束聚变(ICF)实验研究的有效诊断方法之一，其利用电磁透镜将与靶透射和前向散射的电子点对点成像，从而实现对靶物质的诊断。针对HEDP和ICF实验诊断时间分辨率在皮秒至纳秒量级的要求，本项目拟通过高能电子对强激光与金属固体靶相互作用的超快动态成像实验，对高能电子成像系统的时间分辨率进行研究，进而对高能电子与等离子体的相互作用进行初步的研究。拟从实验和模拟两个方面进行：实验方面用高能电子成像系统对高功率激光与固体靶相互作用产生等离子体这一动态过程进行成像研究；理论方面用PIC模拟软件对高功率激光与固体靶相互作用产生等离子体的动态过程进行模拟研究。将实验结果和理论结果相对比，进而对高能电子和等离子体的相互作用，特别是等离子体对透射和前向散射电子横向分布和能量影响进行初步研究，为将来应用HEDP和ICF实验诊断研究提供参考。

中文关键词： 高能电子成像；激光固体靶相互作用；超快成像；时间分辨率

英文摘要： High energy electron radiography is considered as one of the most effective diagnostics tools for high energy density physics (HEDP) and inertial confinement fusion (ICF) experiment research. The principle of electron radiography is as follows: when the electrons interact with the target, the forward transmitted and scattered electrons will include the target information; these electrons are used to be point to point imaging with magnet lens section, which used for diagnosing the target. For the HEDP and ICF diagnostic, the temporal resolution should be with picosecond to nanosecond level. The main of this project is to study the temporal resolution of the high energy electron radiography by imaging the ultra-fast dynamic interaction between high power laser and solid metal target. Furthermore, the interaction of high energy electrons and plasma can be preliminarily studied. The ultra-fast dynamic interaction between high power laser and solid metal target can be studied with high electron radiography experiment, and the laser target interaction can be studied with the PIC simulation. By contrast of the experiment results and simulation results, the high energy electron and plasmas interaction can be studied, specially for the electron transvers parameters and energy dispersion effected by plasma, which can be used as a reference for the future HEDP and ICF experiment research.

英文关键词： high energy electron radiography;laser solid target interaction;ultra-fast radiography;time resolution