| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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A simple analytical model of laser direct-drive thin shell target implosion |
| Bo Yu(余波)1,2,†, Tianxuan Huang(黄天晅)2, Li Yao(姚立)2, Chuankui Sun(孙传奎)2, Wanli Shang(尚万里)2, Peng Wang(王鹏)2, Xiaoshi Peng(彭晓世)2, Qi Tang(唐琦)2, Zifeng Song(宋仔峰)2, Wei Jiang(蒋炜)2, Zhongjing Chen(陈忠靖)2, Yudong Pu(蒲昱东)2, Ji Yan(晏骥)2, Yunsong Dong(董云松)2, Jiamin Yang(杨家敏)2, Yongkun Ding(丁永坤)1,3, and Jian Zheng(郑坚)1,4 |
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 |
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Abstract 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 Shenguang-III 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.
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Received: 03 July 2021
Revised: 11 August 2021
Accepted manuscript online: 27 August 2021
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PACS:
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52.57.-z
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(Laser inertial confinement)
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52.38.Mf
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(Laser ablation)
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24.10.Nz
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(Hydrodynamic models)
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29.25.Dz
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(Neutron sources)
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| Fund: The authors would like to thank the staffs of the Shenguang-III prototype and 100 kJ laser facility for their cooperation. Project supported by the National Natural Science Foundation of China (Grant Nos. 11775203 and 12075219) and the Innovation and Development Fund of China Academy of Engineering Physics (Grant No. CX20210019). |
Corresponding Authors:
Bo Yu
E-mail: yubobnu@163.com
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Cite this article:
Bo Yu(余波), Tianxuan Huang(黄天晅), Li Yao(姚立), Chuankui Sun(孙传奎), Wanli Shang(尚万里), Peng Wang(王鹏), Xiaoshi Peng(彭晓世), Qi Tang(唐琦), Zifeng Song(宋仔峰), Wei Jiang(蒋炜), Zhongjing Chen(陈忠靖), Yudong Pu(蒲昱东), Ji Yan(晏骥), Yunsong Dong(董云松), Jiamin Yang(杨家敏), Yongkun Ding(丁永坤), and Jian Zheng(郑坚) A simple analytical model of laser direct-drive thin shell target implosion 2022 Chin. Phys. B 31 045204
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