Observation and mitigation of image distortion in high-energy electron radiography  

作　　者：Hao-Qing Li Liang Sheng Chang-Qing Zhang Ying-Chao Du Zheng Zhou Xiu-Feng Weng Jia-Hao Xiao Hong-Qiao Yin Bin Sun Kun Wei Yang Li Bao-Jun Duan Yong-Tang Liu Yan-Hong Zhang Mei Zhang Yan Song Xiao-Dong Zhang Jun Liu Zhu-Ming Fu Qing Xu Xue Du Jian-Peng Gao Xin-Yi Wang Xin-Jian Tan Dong-Wei Hei 

机构地区：[1]Department of Engineering Physics,Tsinghua University,Beijing,100084,China [2]State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an,710024,China [3]Institute of Applied Electronics,China Academy of Engineering Physics,Mianyang,621900,China [4]Institute of Intelligent Machines,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei,230031,China [5]Zhongke Hefei Institutes of Collaborative Research and Innovation for Intelligent Agriculture,Hefei,231131,China

出　　处：《Nuclear Science and Techniques》2023年第6期69-77,共9页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.12005211,12075192).

摘　　要：Image distortion caused by the angular misalignment of quadrupole magnets in high-energy electron radiography has been studied systematically.We propose that the distortion originates from the coupling of the electron motions in the transverse directions,based on a theoretical analysis and the transfer-matrix method.The relative angular rotation between the second and third magnetic quadrupoles was identified as the main contributor to image distortion.This was verified by both a beam-dynamics simulation and experiments.Different strategies to mitigate this image distortion are also explored,including magnets online tuning,higher beam energy and larger magnification factor.This study provides criteria for designing experiments and paves the way for achieving higher image precision.

关 键 词：MISALIGNMENT Angular rotation Russian quadruplet Transfer matrix 

分 类 号：O572[理学—粒子物理与原子核物理] TP391.41[理学—物理]