| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Velocity analysis of supersonic jet flow in double-cone ignition scheme |
| Zhong-Yuan Zhu(朱仲源)1, Cheng-Long Zhang(张成龙)2, and Ying-Jun Li(李英骏)1,3,† |
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 |
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Abstract In the double-cone ignition schemes (DCIS), the deuterium-tritium target shell is ablated and compressed by a high-power 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 130-260km/s was achieved for the plasmas at the cone mouth, with a result of nearly 300km/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 high-velocity 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.
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Received: 21 December 2022
Revised: 01 March 2023
Accepted manuscript online: 07 March 2023
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PACS:
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52.57.-z
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(Laser inertial confinement)
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52.57.Kk
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(Fast ignition of compressed fusion fuels)
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| Fund: Project supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDA 25051000 and XDA 25010100). |
Corresponding Authors:
Ying-Jun Li
E-mail: lyj@aphy.iphy.ac.cn
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Cite this article:
Zhong-Yuan Zhu(朱仲源), Cheng-Long Zhang(张成龙), and Ying-Jun Li(李英骏) Velocity analysis of supersonic jet flow in double-cone ignition scheme 2024 Chin. Phys. B 33 065203
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