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Chin. Phys. B, 2017, Vol. 26(11): 115204    DOI: 10.1088/1674-1056/26/11/115204

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. 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
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.
Keywords:  laser plasma accelerator      particle-in-cell simulations      Laguerre-Gaussian pulse  
Received:  27 June 2017      Revised:  01 August 2017      Accepted manuscript online: 
PACS:  52.38.Kd (Laser-plasma acceleration of electrons and ions)  
  52.65.Rr (Particle-in-cell method)  
  42.55.-f (Lasers)  
Fund: 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).
Corresponding Authors:  Min Chen     E-mail:

Cite this article: 

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) Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre-Gaussian pulse 2017 Chin. Phys. B 26 115204

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