中国物理B ›› 2017, Vol. 26 ›› Issue (5): 54103-054103.doi: 10.1088/1674-1056/26/5/054103

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Improved method for studying the propagation dynamics of ultrafast electron pulses based on mean-field models

Meng-Chao Li(李梦超), Xuan Wang(王瑄), Guo-Qian Liao(廖国前), Yu-Tong Li(李玉同), Jie Zhang(张杰)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Collaborative Innovation Centre of Inertial Fusion Science and Applications, Shanghai Jiao Tong University, Shanghai 200240, China;
    4 Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • 收稿日期:2016-12-18 修回日期:2017-02-22 出版日期:2017-05-05 发布日期:2017-05-05
  • 通讯作者: Xuan Wang, Yu-Tong Li E-mail:xw@iphy.ac.cn;ytli@iphy.ac.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2013CBA01501) and the Science Challenge Program and the Strategic Pilot Project of the Chinese Academy of Sciences.

Improved method for studying the propagation dynamics of ultrafast electron pulses based on mean-field models

Meng-Chao Li(李梦超)1,2, Xuan Wang(王瑄)1, Guo-Qian Liao(廖国前)1, Yu-Tong Li(李玉同)1,2,3, Jie Zhang(张杰)3,4   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Collaborative Innovation Centre of Inertial Fusion Science and Applications, Shanghai Jiao Tong University, Shanghai 200240, China;
    4 Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2016-12-18 Revised:2017-02-22 Online:2017-05-05 Published:2017-05-05
  • Contact: Xuan Wang, Yu-Tong Li E-mail:xw@iphy.ac.cn;ytli@iphy.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2013CBA01501) and the Science Challenge Program and the Strategic Pilot Project of the Chinese Academy of Sciences.

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摘要：

We have studied the propagation dynamics of ultrafast electron pulses by using an improved mean-field model, in which the propagation of the electron pulses across the boundary of the acceleration region is explicitly considered. A large decrease in the speed spread of the electron pulses (we called “boundary kick”) is observed and properly treated leading to a significant improvement in the simulation accuracy, particularly when the density of electrons is very large. We show that our method is consistent with the simulation by the N-particle method, while others can introduce factorial error.

关键词: ultrafast electron diffraction, space-charge, mean-field, charge particle propagation

Abstract:

We have studied the propagation dynamics of ultrafast electron pulses by using an improved mean-field model, in which the propagation of the electron pulses across the boundary of the acceleration region is explicitly considered. A large decrease in the speed spread of the electron pulses (we called “boundary kick”) is observed and properly treated leading to a significant improvement in the simulation accuracy, particularly when the density of electrons is very large. We show that our method is consistent with the simulation by the N-particle method, while others can introduce factorial error.

Key words: ultrafast electron diffraction, space-charge, mean-field, charge particle propagation

中图分类号:  (Particle beam transport)

  • 41.85.Ja
61.05.jd (Theories of electron diffraction and scattering) 29.27.Bd (Beam dynamics; collective effects and instabilities) 06.60.Jn (High-speed techniques)