High Energy Electron Radiography Experiment Research Based on Picosencond Pulse Width Bunch
High Energy Electron Radiography Experiment Research Based on Picosencond Pulse Width Bunch
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发表时间：
2014
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通讯作者：
Quantang Zhao;S. Cao;R. Cheng;Xiaokang Shen;Z. Zhang;Yong-tao Zhao;W. Gai;Yingchao Du
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作者：
Quantang Zhao;S. Cao;R. Cheng;Xiaokang Shen;Z. Zhang;Yong-tao Zhao;W. Gai;Yingchao Du
提出了一种利用高能电子束作为探针对高能量密度物质进行时间分辨成像测量的新方案，特别是对高能量密度物质和惯性约束聚变的时间分辨成像测量。中国科学院近代物理研究所和清华大学在清华大学直线电子加速器的基础上完成了第一个皮秒脉宽电子照相实验。对这种超短脉冲电子束团直线加速器进行了原理性试验，证明了它可以用于电子照相。实验结果如放大倍数、成像畸变等与光束光学理论基本一致。在不优化成像透镜截面的情况下，用46倍放大倍数获得了2.5 μ m的RMS空间分辨率。研究发现，在一定的放大倍数范围内，放大倍数越大，RMS空间分辨率越好。详细的实验设置，结果，分析和讨论。
A new scheme is proposed that high energy electron beam as a probe is used for time resolved imaging measurement of high energy density materials, especially for high energy density matter and inertial confinement fusion. The first picosecond pulse-width electron radiography experiment was achieved by Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS) and Tsinghua University (THU), based on THU Linear electron accelerator (LINAC). It is used for principle test and certifying that this kind of LINAC with ultra-short pulse electron bunch can be used for electron radiography. The experiment results, such as magnifying factor and the imaging distortion, are consistent with the beam optical theory well. The 2.5 um RMS spatial resolution has been gotten with magnifying factor 46, without optimization the imaging lens section. It is found that in the certain range of magnifying factor, the RMS spatial resolution will get better with bigger magnifying factor. The details of experiment set up, results, analysis and discussions are presented here.