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

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...

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Published inChinese physics B Vol. 26; no. 11; pp. 355 - 359
Main Author 沈众辰;陈民;张国博;罗辑;翁苏明;远晓辉;刘峰;盛政明
Format Journal Article
LanguageEnglish
Published 01.11.2017
Subjects
三维粒子
同步辐射
模拟方法
激光等离子体
空心电子束
等离子体尾场
脉冲驱动
高斯
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/26/11/115204

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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.
AbstractList 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.
Author 沈众辰;陈民;张国博;罗辑;翁苏明;远晓辉;刘峰;盛政明
AuthorAffiliation Key Laboratory for Laser Plasmas （MoE） and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;Collaborative Innovation Center of IFSA （CICIFSA）, Shanghai Jiao Tong University, Shanghai 200240, China;College of Science, National University of Defense Technology, Changsha 410073, China;SUPA, Department of Physics, University of Strathclyde, Glasgow G40NG, UK
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10.1038/nphys4007
10.1038/nphys2090
10.1038lsa.2017.86
10.1103/PhysRevLett.112.215001
10.1063/1.4943419
10.1103/PhysRevLett.112.235001
10.1038/srep29101
10.1073/pnas.1404336111
10.1103/RevModPhys.85.1
10.1038/lsa.2016.15
10.1063/1.2179194
10.1038/nphys811
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10.1103/PhysRevSTAB.16.030701
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10.1103/PhysRevLett.113.245002
10.1103/RevModPhys.81.1229
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10.1103/PhysRevLett.114.173901
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10.1103/PhysRevLett.43.267
10.1063/1.4943892
10.1103/PhysRevLett.114.084801
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Notes Zhong-Chen Shen1,2, Min Chen1,2, Guo-Bo Zhang1,3, Ji Luo1,2, Su-Ming Weng1,2, Xiao-Hui Yuan1,2, Feng Liu1,2, Zheng-Ming Sheng1,2,4（ 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 G40NG, UK）
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.
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laser plasma accelerator particle-in-cell simulations Laguerre-Gaussian pulse
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SubjectTerms 三维粒子
同步辐射
模拟方法
激光等离子体
空心电子束
等离子体尾场
脉冲驱动
高斯
Title Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre-Gaussian pulse
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