Laser Wakefield Acceleration Using Mid-Infrared Laser Pulses  

作　　者：张国博 N.A.M.Hafz 马燕云 钱列加 邵福球 盛政明 

机构地区：[1]College of Science,National University of Defense Technology [2]Key Laboratory for Laser Plasmas(MOE) and Department of Physics and Astronomy,Shanghai Jiao Tong University [3]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University [4]SUPA,Department of Physics,University of Strathclyde

出　　处：《Chinese Physics Letters》2016年第9期77-81,共5页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant Nos 2013CBA01504;the National Natural Science Foundation of China under Grant Nos 11475260,11374209 and 11375265

摘　　要：We study a laser wakefield acceleration driven by mid-infrared （mid-IR） laser pulses through two-dimensional particle-in-cell simulations. Since a mid-IR laser pulse can deliver a larger ponderomotive force as compared with the usual 0.8 μm wavelength laser pulse, it is found that electron self-injection into the wake wave occurs at an earlier time, the plasma density threshold for injection becomes lower, and the electron beam charge is substantially enhanced. Meanwhile, our study also shows that quasimonoenergetic electron beams with a narrow energy-spread can be generated by using mid-IR laser pulses. Such a mid-IR laser pulse can provide a feasible method for obtaining a high quality and high charge electron beam. Therefore, the current efforts on constructing mid-IR terawatt laser systems can greatly benefit the laser wakefield acceleration research.We study a laser wakefield acceleration driven by mid-infrared （mid-IR） laser pulses through two-dimensional particle-in-cell simulations. Since a mid-IR laser pulse can deliver a larger ponderomotive force as compared with the usual 0.8 μm wavelength laser pulse, it is found that electron self-injection into the wake wave occurs at an earlier time, the plasma density threshold for injection becomes lower, and the electron beam charge is substantially enhanced. Meanwhile, our study also shows that quasimonoenergetic electron beams with a narrow energy-spread can be generated by using mid-IR laser pulses. Such a mid-IR laser pulse can provide a feasible method for obtaining a high quality and high charge electron beam. Therefore, the current efforts on constructing mid-IR terawatt laser systems can greatly benefit the laser wakefield acceleration research.

关 键 词：for as Laser Wakefield Acceleration Using Mid-Infrared Laser Pulses IS in that of LENGTH HIGH 

分 类 号：TN249[电子电信—物理电子学]