Observation and mitigation of image distortion in high energy electron radiography

分类： 核科学技术 >> 辐射物理与技术 提交时间： 2023-06-01

Li, Haoqing Sheng, Liang Zhang, Changqing Du, Yingchao Zhou, Zheng Weng, Xiufeng Xiao, Jiahao Yin, Hongqiao Sun, Bin Wei, Kun Li, Yang Duan, Baojun Liu, Yongtang Zhang, Yanhong Zhang, Mei Song, Yan Zhang, Xiaodong Liu, Jun Fu, Zhuming Xu, Qing

摘要：Image distortion caused by angular misalignment of quadrupole magnets in high energy electron radiography is studied systematically. We propose that the distortion originates from the coupling of the motions of electron in transverse directions based on theoretical analysis via transfer matrix method. The relative angular rotation between the second and third magnetic quadrupoles is identified to be the main contributor to image distortion, which is verified by both beam dynamics simulation and experimental outcomes. In addition, different strategies to mitigate this image distortion are explored, including magnets online tuning, using higher beam energy and larger magnification factor. This study provides some criteria for designing experiments, and paves the way to achieve higher image precision.

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