Generation mechanism of 100 MG magnetic fields in the interaction of ultra-intense laser pulse with nanostructured target

作     者：J.M.Tian H.B.Cai W.S.Zhang E.H.Zhang B.Du S.P.Zhu 

作者机构：Graduate SchoolChina Academy of Engineering PhysicsBeijing 100088China Institute of Applied Physics and Computational MathematicsBeijing 100094China Center for Applied Physics and TechnologyHEDPSand College of EngineeringPeking UniversityBeijing 100871China 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2020年第8卷第2期

页      面：50-55页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 0803[工学-光学工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by the Science Challenge Project(No.TZ2016005) NSAF(No.U1730449) the National Natural Science Foundation of China(Nos.11575030 and 11975055) the National Key Programme for S&T Research and Development in China(No.2016YFA0401100) 

主　　题：nanolayered target self-generated magnetic field ultra-intense laser pulse 

摘      要：Experimental and simulation data[Moreau et al.,Plasma *** 62,014013(2019);Kaymak et al.,***.117,035004(2016)]indicate that self-generated magnetic fields play an important role in enhancing the flux and energy of relativistic electrons accelerated by ultra-intense laser pulse irradiation with nanostructured arrays.A fully relativistic analytical model for the generation of the magnetic field based on electron magneto-hydrodynamic description is presented *** analytical model shows that this self-generated magnetic field originates in the nonparallel density gradient and fast electron current at the interfaces of a nanolayered target.A general formula for the self-generated magnetic field is found,which closely agrees with the simulation scaling over the relevant intensity *** result is beneficial to the experimental designs for the interaction of the laser pulse with the nanostructured arrays to improve laser-to-electron energy coupling and the quality of forward hot electrons.