Effect of sharp vacuum-plasma boundary on the electron injection and acceleration in a few-cycle laser driven wakefield  

作　　者：张国博 刘松 邹德滨 崔野 刘建鹏 杨晓虎 马燕云 邵福球 Guo-Bo Zhang;Song Liu;De-Bin Zou;Ye Cui;Jian-Peng Liu;Xiao-Hu Yang;Yan-Yun Ma;Fu-Qiu Shao(Department of Nuclear Science and Technology,National University of Defense Technology,Changsha 410073,China;Department of Physics,National University of Defense Technology,Changsha 410073,China;Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240,China;College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]Department of Nuclear Science and Technology,National University of Defense Technology,Changsha 410073,China [2]Department of Physics,National University of Defense Technology,Changsha 410073,China [3]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240,China [4]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics B》2023年第9期342-347,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.12005297,12175309,12175310,11975308,and 12275356);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA25050200);the Research Project of NUDT(Grant No.ZK21-12);the Key Laboratory Foundation of Laser Plasma of Ministry of Education;the financial support from the NUDT Young Innovator Awards(Grant No.20190102);Outstanding Young Talents。

摘　　要：The electron injection and acceleration driven by a few-cycle laser with a sharp vacuum-plasma boundary have been investigated through three-dimensional(3D)particle-in-cell simulations.It is found that an isotropic boundary impact injection(BII)first occurs at the vacuum-plasma boundary,and then carrier-envelope-phase(CEP)shift causes the transverse oscillation of the plasma bubble,resulting in a periodic electron self-injection(SI)in the laser polarization direction.It shows that the electron charge of the BII only accounts for a small part of the total charge,and the CEP can effectively tune the quality of the injected electron beam.The dependences of laser intensity and electron density on the total charge and the ratio of BII charge to the total charge are studied.The results are beneficial to electron acceleration and its applications,such as betatron radiation source.

关 键 词：laser wakefield acceleration few-cycle laser sharp vacuum-plasma boundary 

分 类 号：O53[理学—等离子体物理] TN249[理学—物理]