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

作     者：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 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

作者机构：School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900China Institute of Applied Physics and Computational MathematicsBeijing 100088China IFSA Collaborative Innovation CenterShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第4期

页      面：481-485页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

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)。 

主　　题：direct drive analytical model thin shell target neutron yield 

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.