In geostationary orbits and other quasi-vacuum environments,relativistic electron beams are affected by the initial emittance and space charge effects during the propagation process,resulting in beam quality degradation.Furthermore,axial energy distribution change in the beam and the axial transient electromagnetic effect caused by current changes in the head and tail regions of the beam also cause the beam to expand and affect its quality.In this study,the particle-in-cell method was used to construct a long-range propagation model of a relativistic electron beam in a vacuum environment.By calculating and simulating the axial energy distribution of the beam and the changes in the transient electromagnetic field,the axial effect during the propagation process was analyzed,and the parameter change law of the effective propagation of the beam was explored.This provided a theoretical reference for a more accurate assessment of the beam quality during propagation.

Xi WANG;Jianhong HAO;Fang ZHANG;Qiang ZHAO;Jieqing FAN;Bixi XUE;Lei GAO;Chenrui CHAI;Zhiwei DONG

North China Electric Power University,Beijing 102206,People's Republic of China;Institute of Applied Physics and Computational Mathematics,Beijing 100094,People's Republic of China

等离子体科学和技术（英文版）

[1]Xi WANG;Jianhong HAO;Fang ZHANG;Qiang ZHAO;Jieqing FAN;Bixi XUE;Lei GAO;Chenrui CHAI;Zhiwei DONG-.Axial effect analysis of relativistic electron beam propagation in vacuum)[J].等离子体科学和技术（英文版）,2022(06):116-123

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