arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.05587physics.plasm-ph
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提高高温惯性约束聚变内爆点火的热点压力

Improving hot-spot pressure for ignition in high-adiabat Inertial Confinement Fusion implosion

Dongguo Kang, Shaoping Zhu, Wenbing Pei, Shiyang Zou, Wudi Zheng, Jianfa Gu, Zhensheng Dai

摘要:

提出了一种用于提高惯性约束聚变内爆热点压力的新型胶囊靶设计方案。这个设计是基于我们的理论发现的停滞标度律,这表明,热点压力可以通过增加动能密度$ρ_d V_{imp}^2/2$($ρ_d$是壳密度时,达到最大壳速度,$V_{imp}$是内爆速度。)的shell。提出的设计使用高密度推杆来提高壳体密度$ρ_d$,从而改善热点压力。结果表明,该设计在短脉冲双激波作用下,即使在高爆轰下,热点压力也能达到点火要求。该设计有望同时克服实现点火的两个主要障碍--烧蚀不稳定性和激光等离子体不稳定性。

英文摘要:

A novel capsule target design to improve the hot-spot pressure in the high-adiabat implosion for inertial confinement fusion is proposed, where a layer of comparatively high-density material is used as a pusher between the fuel and the ablator. This design is based on our theoretical finding of the stagnation scaling laws, which indicates that the hot spot pressure can be improved by increasing the kinetic energy density $ρ_d V_{imp}^2/2$ ($ρ_d$ is the shell density when the maximum shell velocity is reached, $V_{imp}$ is the implosion velocity.) of the shell. The proposed design uses the high density pusher to enhance the shell density $ρ_d$ so that the hot spot pressure is improved. Radio-hydrodynamic simulations show that the hot spot pressure of the design reaches the requirement for ignition even driven by a very high-adiabat short-duration two-shock pulse. The design is hopeful to simultaneously overcome the two major obstacles to achieving ignition--ablative instability and laser-plasma instability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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