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Ren, Kuan; Wu, Junfeng; Dong, Jianjun; Li, Yaran; Huang, Tianxuan; Zhao, Hang; Liu, Yaoyuan; Cao, Zhurong; Zhang, Jiyan; Mu, Baozhong; Yan, Ji; Jiang, Wei; Pu, Yudong; Li, Yulong; Peng, Xiaoshi; Xu, Tao; Yang, Jiamin; Lan, Ke; Ding, Yongkun; Jiang, Shaoen; Wang, Feng
Scientific reports, 07/2021, Volume: 11, Issue: 1Journal Article
In inertial confinement fusion, quantitative and high-spatial resolution (Formula: see textm) measurements of the X-rays self-emitted by the hotspot are critical for studying the physical processes of the implosion stagnation stage. Herein, the 8 ± 0.39-keV monochromatic X-ray distribution from the entire hotspot is quantitatively observed in 5-Formula: see textm spatial resolution using a Kirkpatrick-Baez microscope, with impacts from the responses of the diagnosis system removed, for the first time, in implosion experiments at the 100 kJ laser facility in China. Two-dimensional calculations along with 2.5% P2 drive asymmetry and 0.3 ablator self-emission are congruent with the experimental results, especially for the photon number distribution, hotspot profile, and neutron yield. Theoretical calculations enabled a better understanding of the experimental results. Furthermore, the origins of the 17.81% contour profile of the deuterium-deuterium hotspot and the accurate Gaussian source approximation of the core emission area in the implosion capsule are clarified in detail. This work is significant for quantitatively exploring the physical conditions of the hotspot and updating the theoretical model of capsule implosion.
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