Determination of laser entrance hole size for ignition-scale octahedral spherical hohlraums

查看全文 作　　者：Yao-Hua [1]Chen;Zhichao [2]Li;Hui [1]Cao;Kaiqiang [2]Pan;Sanwei [2]Li;Xufei [2]Xie;Bo [2]Deng;Qiangqiang [2]Wang;Zhurong [2]Cao;Lifei [2]Hou;Xingsen [2]Che;Pin [2]Yang;Yingjie [2]Li;Xiaoan [2]He;Tao [2]Xu;Yonggang [2]Liu;Yulong [2]Li;Xiangming [2]Liu;Haijun [2]Zhang;Wei [2]Zhang;Baibin [2]Jiang;Jun [2]Xie;Wei [2]Zhou;Xiaoxia [2]Huang;Wen Yi [1]Huo;Guoli [1]Ren;Kai [1]Li;Xudeng [1]Hang;Shu [1]Li;Chuanlei [1]Zhai;Jie [3,4]Liu;Shiyang [1]Zou;Yongkun [1,4]Ding;Ke [1,4]Lan

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;[2]Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;[3]Graduate School,China Academy of Engineering Physics,Beijing,China;[4]HEDPS,Center for Applied Physics and Technology,and College of Engineering,Peking University,Beijing 100871,China

出　　处：《Matter and Radiation at Extremes》索引2022年第7卷第6期,共9页

基　　金：This work is supported by the National Natural Science Foundation of China(Grant No.12035002). 摘　　要：A recently proposed octahedral spherical hohlraum with six laser entrance holes(LEHs)is an attractive concept for an upgraded laser facility aiming at a predictable and reproducible fusion gain with a simple target design.However,with the laser energies available at present,LEH size can be a critical issue.Owing to the uncertainties in simulation results,the LEH size should be determined on the basis of experimental evidence.However,determination of LEH size of an ignition target at a small-scale laser facility poses difficulties.In this paper,we propose to use the prepulse of an ignition pulse to determine the LEH size for ignition-scale hohlraums via LEH closure behavior,and we present convincing evidence from multiple diagnostics at the SGIII facility with ignition-scale hohlraum,laser prepulse,and laser beam size.The LEH closure observed in our experiment is in agreement with data from the National Ignition Facility.The total LEH area of the octahedral hohlraum is found to be very close to that of a cylindrical hohlraum,thus successfully demonstrating the feasibility of the octahedral hohlraum in terms of laser energy,which is crucially important for sizing an ignition-scale octahedrally configured laser system.This work provides a novel way to determine the LEH size of an ignition target at a small-scale laser facility,and it can be applied to other hohlraum configurations for the indirect drive approach. 关键词：LASER SIZE SPHERICAL

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Determination of laser entrance hole size for ignition-scale octahedral spherical hohlraums

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