Velocity analysis of supersonic jet flow in double-cone ignition scheme  

作　　者：朱仲源 张成龙 李英骏 Zhong-Yuan Zhu;Cheng-Long Zhang;Ying-Jun Li(School of Science,China University of Mining and Technology,Beijing 100083,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China;Double-cone ignition(DCI)joint team,State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]School of Science,China University of Mining and Technology,Beijing 100083,China [2]State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China [3]Double-cone ignition(DCI)joint team,State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China

出　　处：《Chinese Physics B》2024年第6期460-465,共6页中国物理B（英文版）

基　　金：Project supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDA25051000 and XDA 25010100)。

摘　　要：In the double-cone ignition schemes(DCIS), the deuterium–tritium target shell is ablated and compressed by a highpower nanosecond laser in Au-cones to generate plasmas. Under the actions of spherically symmetric compression and acceleration along the Au cone, they will be ejected out of the cone mouth and collide with each other. The plasmas experience conversion from kinetic energy to internal energy at the vertex of the geometric center of two Au cones that are symmetric to each other, because of which high-density fusion plasmas are preheated. This key physical process has undergone experimental verification on the Shenguang-II upgraded facility in China. Apparently, the improvement and optimization of the velocity of plasmas in hypersonic jet flow at the cone mouth are crucial for the success of the DCIS. In the DCIR7 experiment of the Shenguang-II upgraded facility, a velocity yield of approximately 130–260 km/s was achieved for the plasmas at the cone mouth, with a result of nearly 300 km/s based on numerical simulation. In this paper, theoretical analysis is performed as regards the process, in which target shells are ablated and compressed by laser to generate highvelocity plasmas ejected through jet flow. Based on this analysis, the formula for the velocity of plasmas in supersonic jet flow at the cone mouth is proposed. This study also provides measures that are more effective for improving the kinetic energy of plasmas and optimizing energy conversion efficiency, which can serve as theoretical references for the adjustment and optimization of processes in subsequent experiments.

关 键 词：double-cone ignition(DCI) plasma hydrodynamics laser fusion 

分 类 号：TL632[核科学技术—核技术及应用]