We propose a scheme to minimize the energy spread of an electron beam (e-beam) in a cascaded laser wakefield accelerator to the one-thousandth-level by inserting a stage to compress its longitudinal spatial distribution. In this scheme, three-segment plasma stages are designed for electron injection, e-beam length compression, and e-beam acceleration, respectively. The trapped e-beam in the injection stage is transferred to the zero-phase region at the center of one wakefield period in the compression stage where the length of the e-beam can be greatly shortened owing to the velocity bunching. After being seeded into the third stage for acceleration, the e-beam can be accelerated to a much higher energy before its energy chirp is compensated owing to the shortened e-beam length. A one-dimensional theory and two-dimensional particle-in-cell simulations have demonstrated this scheme and an e-beam with 0.2% rms energy spread and low transverse emittance could be generated without loss of charge.
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Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching
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Research Article|
May 10 2016
Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching
Zhijun Zhang;
Zhijun Zhang
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Wentao Li;
Wentao Li
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Jiansheng Liu
;
Jiansheng Liu
a)
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
2Collaborative Innovation Center of IFSA (CICIFSA),
Shanghai Jiao Tong University
, Shanghai 200240, China
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Wentao Wang;
Wentao Wang
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Changhai Yu;
Changhai Yu
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Ye Tian;
Ye Tian
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Kazuhisa Nakajima;
Kazuhisa Nakajima
3Center for Relativistic Laser Science (CoReLS),
Institute for Basic Science (IBS)
, Gwangju 61005, South Korea
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Aihua Deng;
Aihua Deng
4Department of Physics and Astronomy,
University of California
, Los Angeles, California 90095, USA
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Rong Qi;
Rong Qi
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Cheng Wang;
Cheng Wang
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Zhiyong Qin;
Zhiyong Qin
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Ming Fang;
Ming Fang
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Jiaqi Liu;
Jiaqi Liu
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Changquan Xia;
Changquan Xia
5College of Physical Science and Technology,
Yangzhou University
, Yangzhou, Jiangsu 225001, China
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Ruxin Li;
Ruxin Li
b)
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Zhizhan Xu
Zhizhan Xu
c)
1State Key Laboratory of High Field Laser Physics,
Shanghai Institute of Optics and Fine Mechanics
, Chinese Academy of Sciences, Shanghai 201800, China
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Phys. Plasmas 23, 053106 (2016)
Article history
Received:
January 29 2016
Accepted:
April 07 2016
Citation
Zhijun Zhang, Wentao Li, Jiansheng Liu, Wentao Wang, Changhai Yu, Ye Tian, Kazuhisa Nakajima, Aihua Deng, Rong Qi, Cheng Wang, Zhiyong Qin, Ming Fang, Jiaqi Liu, Changquan Xia, Ruxin Li, Zhizhan Xu; Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching. Phys. Plasmas 1 May 2016; 23 (5): 053106. https://doi.org/10.1063/1.4947536
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