Observation and mitigation of image distortion in high energy electron radiography

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

doi:10.1007/s41365-023-01234-y

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Observation and mitigation of image distortion in high energy electron radiography

ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS | Updated：2023-08-14

- Observation and mitigation of image distortion in high energy electron radiography
- Nuclear Science and Techniques Vol. 34, Issue 6, Article number: 93(2023)
- Affiliations：
  
  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
- Author bio：
  
  †shengliang@tsinghua.org.cn
  ‡dych@mail.tsinghua.edu.cn
  §z-zhou14@tsinghua.org.cn
- Funds：
- DOI：10.1007/s41365-023-01234-y
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Hao-Qing Li, Liang Sheng, Chang-Qing Zhang, et al. Observation and mitigation of image distortion in high energy electron radiography. [J]. Nuclear Science and Techniques 34(6):93(2023)
DOI：

Hao-Qing Li, Liang Sheng, Chang-Qing Zhang, et al. Observation and mitigation of image distortion in high energy electron radiography. [J]. Nuclear Science and Techniques 34(6):93(2023) DOI： 10.1007/s41365-023-01234-y.

摘要

Abstract

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

Keywords

MisalignmentAngular rotationRussian QuadrupletTransfer matrix

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