A simple analytical model of laser direct-drive thin shell target implosion  

作　　者：Bo Yu Tianxuan Huang Li Yao Chuankui Sun Wanli Shang Peng Wang Xiaoshi Peng Qi Tang Zifeng Song Wei Jiang Zhongjing Chen Yudong Pu Ji Yan Yunsong Dong Jiamin Yang Yongkun Ding Jian Zheng 余波;黄天晅;姚立;孙传奎;尚万里;王鹏;彭晓世;唐琦;宋仔峰;蒋炜;陈忠靖;蒲昱东;晏骥;董云松;杨家敏;丁永坤;郑坚(School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China;Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;Institute of Applied Physics and Computational Mathematics,Beijing 100088,China;IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China [2]Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China [3]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China [4]IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Chinese Physics B》2022年第4期481-485,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11775203 and 12075219);the Innovation and Development Fund of China Academy of Engineering Physics(Grant No.CX20210019)。

摘　　要：A high-neutron yield platform imploded by a thin shell target is generally built to probe nuclear science problems,and it has the advantages of high neutron yield,ultrashort fusion time,micro fusion zone,isotropic and monoenergetic neutron.Some analytical models have been proposed to interpret exploding-pusher target implosion driven by a long wavelength laser,whereas they are imperfect for a 0.35 μm laser implosion experiment.When using the 0.35 μm laser,the shell is ablated and accelerated to high implosion velocity governed by Newton’s law,ablation acceleration and quasi-adiabatic compression models are suitable to explain the implosion of a laser direct-drive thin shell target.The new analytical model scales bang time,ion temperature and neutron yield for large variations in laser power,target radius,shell thickness,and fuel pressure.The predicted results of the analytical model are in agreement with experimental data on the ShenguangIII prototype laser facility,100 kJ laser facility,Omega,and NIF,it demonstrates that the analytical model benefits the understanding of experiment performance and optimizing the target design of high neutron yield implosion.

关 键 词：direct drive analytical model thin shell target neutron yield 

分 类 号：TN249[电子电信—物理电子学]