中国物理B ›› 2017, Vol. 26 ›› Issue (11): 115204-115204.doi: 10.1088/1674-1056/26/11/115204

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre-Gaussian pulse

Zhong-Chen Shen(沈众辰), Min Chen(陈民), Guo-Bo Zhang(张国博), Ji Luo(罗辑), Su-Ming Weng(翁苏明), Xiao-Hui Yuan(远晓辉), Feng Liu(刘峰), Zheng-Ming Sheng(盛政明)   

  1. 1. Key Laboratory for Laser Plasmas(MoE) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Collaborative Innovation Center of IFSA(CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China;
    3. College of Science, National University of Defense Technology, Changsha 410073, China;
    4. SUPA, Department of Physics, University of Strathclyde, Glasgow G40 NG, UK
  • 收稿日期:2017-06-27 修回日期:2017-08-01 出版日期:2017-11-05 发布日期:2017-11-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11374209, 11374210, and 11774227) and the Major State Basic Research Development Program of China (Grant No. 2015CB859700).

Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre-Gaussian pulse

Zhong-Chen Shen(沈众辰)1,2, Min Chen(陈民)1,2, Guo-Bo Zhang(张国博)1,3, Ji Luo(罗辑)1,2, Su-Ming Weng(翁苏明)1,2, Xiao-Hui Yuan(远晓辉)1,2, Feng Liu(刘峰)1,2, Zheng-Ming Sheng(盛政明)1,2,4   

  1. 1. Key Laboratory for Laser Plasmas(MoE) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Collaborative Innovation Center of IFSA(CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China;
    3. College of Science, National University of Defense Technology, Changsha 410073, China;
    4. SUPA, Department of Physics, University of Strathclyde, Glasgow G40 NG, UK
  • Received:2017-06-27 Revised:2017-08-01 Online:2017-11-05 Published:2017-11-05
  • Contact: Min Chen E-mail:minchen@sjtu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11374209, 11374210, and 11774227) and the Major State Basic Research Development Program of China (Grant No. 2015CB859700).

摘要: By using three-dimensional particle-in-cell simulations, externally injected electron beam acceleration and radiation in donut-like wake fields driven by a Laguerre-Gaussian pulse are investigated. Studies show that in the acceleration process the total charge and azimuthal momenta of electrons can be stably maintained at a distance of a few hundreds of micrometers. Electrons experience low-frequency spiral rotation and high-frequency betatron oscillation, which leads to a synchrotron-like radiation. The radiation spectrum is mainly determined by the betatron motion of electrons. The far field distribution of radiation intensity shows axial symmetry due to the uniform transverse injection and spiral rotation of electrons. Our studies suggest a new way to simultaneously generate hollow electron beam and radiation source from a compact laser plasma accelerator.

关键词: laser plasma accelerator, particle-in-cell simulations, Laguerre-Gaussian pulse

Abstract: By using three-dimensional particle-in-cell simulations, externally injected electron beam acceleration and radiation in donut-like wake fields driven by a Laguerre-Gaussian pulse are investigated. Studies show that in the acceleration process the total charge and azimuthal momenta of electrons can be stably maintained at a distance of a few hundreds of micrometers. Electrons experience low-frequency spiral rotation and high-frequency betatron oscillation, which leads to a synchrotron-like radiation. The radiation spectrum is mainly determined by the betatron motion of electrons. The far field distribution of radiation intensity shows axial symmetry due to the uniform transverse injection and spiral rotation of electrons. Our studies suggest a new way to simultaneously generate hollow electron beam and radiation source from a compact laser plasma accelerator.

Key words: laser plasma accelerator, particle-in-cell simulations, Laguerre-Gaussian pulse

中图分类号:  (Laser-plasma acceleration of electrons and ions)

  • 52.38.Kd
52.65.Rr (Particle-in-cell method) 42.55.-f (Lasers)