Spatial and temporal evolution of electromagnetic pulses from solid target irradiated with multi-hundred-terawatt laser pulse inside target chamber  

作　　者：何强友 邓志刚 张智猛 夏亚东 张博 孟令彪 贺书凯 黄华 杨雷 刘红杰 范伟 林晨 周维民 李廷帅 颜学庆 Qiangyou HE;Zhigang DENG;Zhimeng ZHANG;Yadong XIA;Bo ZHANG;Lingbiao MENG;Shukai HE;Hua HUANG;Lei YANG;Hongjie LIU;Wei FAN;Chen LIN;Weimin ZHOU;Tingshuai LI;Xueqing YAN(State Key Laboratory of Nuclear Physics and Technology,and Key Laboratory of HEDP of the Ministry of Education,CAPT,Peking University,Beijing 100871,People's Republic of China;Science and Technology on Plasma Physics Laboratory,Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,People's Republic of China;School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,People's Republic of China;Beijing Laser Acceleration Innovation Center,Beijing 101400,People's Republic of China)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,and Key Laboratory of HEDP of the Ministry of Education,CAPT,Peking University,Beijing 100871,People's Republic of China [2]Science and Technology on Plasma Physics Laboratory,Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,People's Republic of China [3]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,People's Republic of China [4]Beijing Laser Acceleration Innovation Center,Beijing 101400,People's Republic of China

出　　处：《Plasma Science and Technology》2024年第2期62-69,共8页等离子体科学和技术（英文版）

基　　金：supported by National Grand Instrument Project (No.2019YFF01014404);the National Key Program for S & T Research and Development (No. 2022YFA1603202);National Natural Science Foundation of China (Nos.U2241281 and 11975037);the Foundation of Science and Technology on Plasma Physics Laboratory (No.6142A04220108)。

摘　　要：Giant electromagnetic pulses(EMPs) induced by high-power laser irradiating solid targets interfere with various experimental diagnoses and even damage equipment,so unveiling the evolution of EMPs inside the laser chamber is crucial for designing effective EMP shielding.In this work,the transmission characteristics of EMPs as a function of distances from the target chamber center(TCC) are studied using B-dot probes.The mean EMP amplitude generated by picosecond laser-target interaction reaches 561 kV m^(-1),357 kV m^(-1),395 kV m^(-1),and 341 kV m^(-1)at 0.32 m,0.53 m,0.76 m,and 1 m from TCC,which decreases dramatically from 0.32 m to 0.53 m.However,it shows a fluctuation from 0.53 m to 1 m.The temporal features of EMPs indicate that time-domain EMP signals near the target chamber wall have a wider full width at half maximum compared to that close to TCC,mainly due to the echo oscillation of electromagnetic waves inside the target chamber based on simulation and experimentation.The conclusions of this study will provide a new approach to mitigate strong electromagnetic pulses by decreasing the echo oscillation of electromagnetic waves inside the target chamber during laser coupling with targets.

关 键 词：TARGET electromagnetic pulses spatial distribution 

分 类 号：TN249[电子电信—物理电子学]