高能电子三维成像技术实验研究  

Experimental demonstration of three-dimensional high energy electron radiography

作　　者：李双双 赵全堂[2,3] 曹树春 冉朝晖[2] 申晓康 赵书俊 张子民[2,3] Li Shuang-Shuang;Zhao Quan-Tang;Cao Shu-Chun;Ran Zhao-Hui;Shen Xiao-Kang;Zhao Shu-Jun;Zhang Zi-Min(School of Physics,Zhengzhou University,Zhengzhou 450000,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Sciences and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]郑州大学物理学院,郑州450000 [2]中国科学院近代物理研究所,兰州730000 [3]中国科学院大学核科学与技术学院,北京100049

出　　处：《物理学报》2021年第18期154-161,共8页Acta Physica Sinica

基　　金：国家重点研发计划(批准号:2019YFA0404900);国家自然科学基金(批准号:11875303);中国科学院国际合作局对外合作重点项目(批准号:113462KYSB20160036)资助的课题.

摘　　要：高能电子成像技术被首次提出作为温稠密物质和惯性约束聚变实验研究的高时空分辨诊断工具之一,现已通过前期实验证明其对中尺度科学诊断的可行性.为了进一步提高高能电子成像技术诊断样品的能力,来获取样品内部信息,将高能电子成像技术和三维重建算法结合,提出了高能电子三维成像技术.本文主要通过实验研究了高能电子三维成像技术的可行性.不同三维重建算法重建样品的结果首次证实了高能电子三维成像技术的可行性,使用的三维重建算法包括滤波反投影算法、迭代算法-代数重建技术和联立代数重建技术,最终重建的x,y,z方向上的不同重建切片图像清楚地显示了样品的详细结构.实验证实的高能电子三维成像技术将有利于拓展高能电子成像技术的应用领域,尤其是在中尺度科学领域.High energy electron radiography(HEER)proposed first for real-time high spatial and temporal resolution diagnosis of warm dense matter(WDM)and inertial confinement fusion(ICF)has proved experimentally feasible for mesoscale sciences diagnosis.Until now,the spatial resolution of the images close to 1μm has been reached experimentally which is better than that of X-rays and neutron radiography.However,traditional HEER obtains two-dimensional images which cannot accurately present the three-dimensional structure of the sample.To further improve the capability of HEER to diagnose and obtain the internal information of samples,three-dimensional high energy electron radiography(TDHEER)was put forward by combining HEER with three-dimensional(3D)reconstruction tomography technology.The validity and usage of the TDHEER method have been confirmed through simulation of the fully 3D diagnostic of static mesoscale sample.This paper focuses mainly on the experimental demonstration of the 3D high energy electron radiography.The feasibility of TDHEER is for the first time confirmed by the results achieved with different 3D reconstruction algorithms.The 3D reconstruction algorithms,analytical algorithm-filtered back projection(FBP),iterative algorithms-algebraic reconstruction technique(ART),and simultaneous algebraic reconstruction technique(SART)are used here.In this experiment,the less projected data are used,so it takes the less time to obtain two-dimensional(2D)HEER images and the reconstruction.In order to spend the time as little as possible and obtain the satisfactory quality of reconstruction result,there are three groups of projected image sets,180,36 and 18,acquired in our experiment.When all three algorithms are adopted in 180 projected images,the reconstructed images show that all three algorithms FBP,ART and SART are feasible for TDHEER.The different reconstructed slice images of the sample in X-,Y-,and Z-direction clearly show the detailed structure of the sample.The images reconstructed by ART and SART algorithm

关 键 词：高能电子成像 三维重建算法 高能电子三维成像 中尺度科学 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O57[自动化与计算机技术—计算机科学与技术]