Model of self-generated magnetic field generation from relativistic laser interaction with solid targets  

作　　者：严睿 邹德滨 赵娜 杨晓虎 蒋祥瑞 胡理想 徐新荣 周泓宇 余同普 卓红斌 邵福球 银燕 Rui Yan;De-Bin Zou;Na Zhao;Xiao-Hu Yang;Xiang-Rui Jiang;Li-Xiang Hu;Xin-Rong Xu;Hong-Yu Zhou;Tong-Pu Yu;Hong-Bin Zhuo;Fu-Qiu Shao;Yan Yin(Northwest Institute of Nuclear Technology,Xi'an 710024,China;Department of Physics,National University of Defense Technology,Changsha 410073,China;School of Microelectronics and Physics,Hunan University of Technology and Business,Changsha 410205,China;Department of Nuclear Science and Technology,National University of Defense Technology,Changsha 410073,China;College of Engineering Physics,Shenzhen Technology University,Shenzhen 518118,China)

机构地区：[1]Northwest Institute of Nuclear Technology,Xi'an 710024,China [2]Department of Physics,National University of Defense Technology,Changsha 410073,China [3]School of Microelectronics and Physics,Hunan University of Technology and Business,Changsha 410205,China [4]Department of Nuclear Science and Technology,National University of Defense Technology,Changsha 410073,China [5]College of Engineering Physics,Shenzhen Technology University,Shenzhen 518118,China

出　　处：《Chinese Physics B》2024年第5期511-517,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12175310,12305268,and U2241281);the Natural Science Foundation of Hunan Province(Grant Nos.2024JJ6184,2022JJ20042,and 2021JJ40653);the Scientific Research Foundation of Hunan Provincial Education Department(Grant Nos.22B0655 and 22A0435)。

摘　　要：Generation of self-generated annular magnetic fields at the rear side of a solid target driven by relativistic laser pulse is investigated by using theoretical analysis and particle-in-cell simulations.The spatial strength distribution of magnetic fields can be accurately predicted by calculating the net flow caused by the superposition of source flow and return flow of hot electrons.The theoretical model established shows good agreement with the simulation results,indicating that the magnetic-field strength scales positively to the temperature of hot electrons.This provides us a way to improve the magnetic-field generation by using a micro-structured plasma grating in front of the solid target.Compared with that for a common flat target,hot electrons can be effectively heated with the well-designed grating size,leading to a stronger magnetic field.The spatial distribution of magnetic fields can be modulated by optimizing the grating period and height as well as the incident angle of the laser pulse.

关 键 词：self-generated magnetic field laser solid-target interaction micro-structured plasma grating 

分 类 号：TN24[电子电信—物理电子学]