Generation of 20 kA electron beam from a laser wakefield accelerator

被引：50
|
作者：
Li, Y. F. [1 ]
Li, D. Z. [2 ]
Huang, K. [1 ,3 ]
Tao, M. Z. [1 ]
Li, M. H. [1 ]
Zhao, J. R. [1 ]
Ma, Y. [1 ]
Guo, X. [1 ]
Wang, J. G. [1 ]
Chen, M. [4 ,5 ,6 ]
Hafz, N. [4 ,5 ,6 ]
Zhang, J. [4 ,5 ,6 ]
Chen, L. M. [1 ,4 ,5 ,6 ,7 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[3] Natl Inst Quantum & Radiol Sci & Technol QST, Kansai Photon Sci Inst, 8-1-7 Umemidai, Kizugawa, Kyoto 6190215, Japan
[4] Shanghai Jiao Tong Univ, Key Lab Laser Plasmas MOE, Shanghai 200240, Peoples R China
[5] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[6] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, Shanghai 200240, Peoples R China
[7] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
来源：
PHYSICS OF PLASMAS | 2017年 / 24卷 / 02期
基金：
中国国家自然科学基金;
关键词：
X-RAYS; PLASMA; DRIVEN;
D O I：
10.1063/1.4975613
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We present the experimentally generated electron bunch from laser-wakefield acceleration (LWFA) with a charge of 620 pC and a maximum energy up to 0.6 GeV by irradiating 80 TW laser pulses at a 3mm Helium gas jet. The charge of injected electrons is much larger than the normal scaling laws of LWFA in bubble regime. We also got a quasi-monoenergetic electron beam with energy peaked at 249MeV and a charge of 68 pC with the similar laser conditions but lower plasma density. As confirmed by 2D particle-in-cell simulations, the boosted bunch charge is due to the continuous injection caused by the self-steepening and self-compression of a laser pulse. During the nonlinear evolution of the laser pulse, the bubble structure broadens and stretches, leading to a longer dephasing length and larger beam charge. Published by AIP Publishing.
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页数：7
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