Diagnosing the fast-heating process of the double-cone ignition scheme with X-ray spectroscopy

被引：3
|
作者：
Dai, Yu [1 ,2 ]
Gu, Haochen [1 ,2 ]
Fang, Ke [1 ]
Zhang, Yihang [1 ,3 ]
Zhang, Chenglong [1 ]
Dong, Yufeng [1 ]
Zhang, Zhe [1 ,4 ,5 ]
Yuan, Xiaohui [4 ,6 ,7 ]
Li, Yutong [1 ,2 ,4 ,5 ]
Zhang, Jie [1 ,4 ,6 ,7 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing, Peoples R China
[3] China Univ Min & Technol, State Key Lab Tunnel Engn, Beijing, Peoples R China
[4] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, Shanghai, Peoples R China
[5] Songshan Lake Mat Lab, Dongguan, Peoples R China
[6] Shanghai Jiao Tong Univ, Key Lab Laser Plasma MOE, Shanghai 200240, Peoples R China
[7] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
来源：
HIGH POWER LASER SCIENCE AND ENGINEERING | 2024年 / 12卷
基金：
中国国家自然科学基金;
关键词：
direct drive; fast ignition; inertial confinement fusion; plasma spectroscopy; CODE; HYDRODYNAMICS; ELECTRON; PLASMA; TARGET;
D O I：
10.1017/hpl.2024.32
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In the double-cone ignition scheme of inertial confinement fusion, the head-on collision of two compressed fuel jets from the cone-tips forms an isochoric plasma, which is then heated suddenly by a MeV relativistic electron beam produced by ultra-intense picosecond laser pulses. This fast-heating process was studied experimentally at the Shenguang II upgrade laser facility. By observing temporal-resolved X-ray emission and the spatial-resolved X-ray spectrum, the colliding process and heating process are carefully studied. The colliding plasma was imaged to have dimensions of approximately 86 mu m in the implosion direction and approximately 120 mu m in the heating direction. By comparing the simulated plasma X-ray spectrum with experimental data, the electron temperature of the heated plasma was found to rapidly increase to 600 +/- 50 eV, almost doubling the temperature achieved before the heating laser incidence.
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页数：8
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