Laser pulse shape designer for direct-drive inertial confinement fusion implosions  

作　　者：Tao Tao Guannan Zheng Qing Jia Rui Yan Jian Zheng 

机构地区：[1]Department of Plasma Physics and Fusion Engineering and CAS Key Laboratory of Geospace Environment,University of Science and Technology of China,Hefei,China [2]Department of Modern Mechanics,University of Science and Technology of China,Hefei,China [3]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai,China

出　　处：《High Power Laser Science and Engineering》2023年第3期76-85,共10页高功率激光科学与工程（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA25010200);the Fundamental Research Funds for the Central Universities (No. WK2140000014);the DCI joint team

摘　　要：Pulse shaping is a powerful tool for mitigating implosion instabilities in direct-drive inertial confinement fusion(ICF).However,the high-dimensional and nonlinear nature of implosions makes the pulse optimization quite challenging.In this research,we develop a machine-learning pulse shape designer to achieve high compression density and stable implosion.The facility-specific laser imprint pattern is considered in the optimization,which makes the pulse design more relevant.The designer is applied to the novel double-cone ignition scheme,and simulation shows that the optimized pulse increases the areal density expectation by 16%in one dimension,and the clean-fuel thickness by a factor of four in two dimensions.This pulse shape designer could be a useful tool for direct-drive ICF instability control.

关 键 词：double-cone ignition hydrodynamics instability machine-learning optimization pulse shape optimization 

分 类 号：TL62[核科学技术—核技术及应用]