Rotating attosecond electron sheets and ultra-brilliant multi-MeV γ-rays driven by intense laser pulses  

作　　者：Li-Xiang Hu Tong-Pu Yu Yue Cao Min Chen De-Bin Zou Yan Yin Zheng-Ming Sheng Fu-Qiu Shao 

机构地区：[1]Department of Physics,National University of Defense Technology,Changsha,China [2]Collaborative Innovation Center of IFSA(CICIFSA),Key Laboratory for Laser Plasmas(MoE)and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai,China

出　　处：《High Power Laser Science and Engineering》2024年第6期7-15,共9页高功率激光科学与工程(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.12105362,12375244,12275356,12135009,U2241281 and 12175310);the Natural Science Foundation of Hunan Province(No.2022JJ20042);the Innovation Foundation for Graduate Students(No.CX20220048)

摘　　要：Isolated multi-MeV γ-rays with attosecond duration,high collimation and beam angular momentum(BAM)may find many interesting applications in nuclear physics,astrophysics,etc.Here,we propose a scheme to generate such γ-rays via nonlinear Thomson scattering of a rotating relativistic electron sheet driven by a few-cycle twisted laser pulse interacting with a micro-droplet target.Our model clarifies the laser intensity threshold and carrier-envelope phase effect on the generation of the isolated electron sheet.Three-dimensional numerical simulations demonstrate the γ-ray emission with 320 attoseconds duration and peak brilliance of 9.3×10^(24)photons s^(-1)mrad^(-2)mm^(-2)per 0.1%bandwidth at 4.3 MeV.The γ-ray beam carries a large BAM of 2.8×10^(16)■,which arises from the efficient BAM transfer from the rotating electron sheet,subsequently leading to a unique angular distribution.This work should promote the experimental investigation of nonlinear Thomson scattering of rotating electron sheets in large laser facilities.

关 键 词：isolated attosecond electron sheet isolated attosecondγ-ray nonlinear Thomson scattering 

分 类 号：TL816.2[核科学技术—核技术及应用]