Theoretical and simulation research of hydrodynamic instabilities in inertial-confinement fusion implosions

被引：0

作者：

LiFeng Wang

WenHua Ye

XianTu He

JunFeng Wu

ZhengFeng Fan

Chuang Xue

HongYu Guo

WenYong Miao

YongTeng Yuan

JiaQin Dong

Guo Jia

Jing Zhang

YingJun Li

Jie Liu

Min Wang

YongKun Ding

WeiYan Zhang

机构：

[1] Institute of Applied Physics and Computational Mathematics,Center for Applied Physics and Technology, HEDPS

[2] Peking University,IFSA Collaborative Innovation Center of MoE

[3] Shanghai Jiaotong University,Institute of Fusion Theory and Simulation

[4] Zhejiang University,Graduate School

[5] China Academy of Engineering Physics,Research Center of Laser Fusion

[6] China Academy of Engineering Physics,State Key Laboratory for GeoMechanics and Deep Underground Engineering

[7] Shanghai Institute of Laser Plasma,undefined

[8] China University of Mining and Technology,undefined

来源：

Science China Physics, Mechanics & Astronomy | 2017年 / 60卷

关键词：

hydrodynamic instabilities; inertial-confinement fusion implosions; Rayleigh-Taylor instability; Richtmyer-Meshkov in- stability; Kelvin-Helmholtz instability; convergent geometry effects; perturbation feed-through;

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中图分类号：

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摘要：

Inertial fusion energy (IFE) has been considered a promising, nearly inexhaustible source of sustainable carbon-free power for the world’s energy future. It has long been recognized that the control of hydrodynamic instabilities is of critical importance for ignition and high-gain in the inertial-confinement fusion (ICF) hot-spot ignition scheme. In this mini-review, we summarize the progress of theoretical and simulation research of hydrodynamic instabilities in the ICF central hot-spot implosion in our group over the past decade. In order to obtain sufficient understanding of the growth of hydrodynamic instabilities in ICF, we first decompose the problem into different stages according to the implosion physics processes. The decomposed essential physics pro- cesses that are associated with ICF implosions, such as Rayleigh-Taylor instability (RTI), Richtmyer-Meshkov instability (RMI), Kelvin-Helmholtz instability (KHI), convergent geometry effects, as well as perturbation feed-through are reviewed. Analyti- cal models in planar, cylindrical, and spherical geometries have been established to study different physical aspects, including density-gradient, interface-coupling, geometry, and convergent effects. The influence of ablation in the presence of preheating on the RTI has been extensively studied by numerical simulations. The KHI considering the ablation effect has been discussed in detail for the first time. A series of single-mode ablative RTI experiments has been performed on the Shenguang-II laser facility. The theoretical and simulation research provides us the physical insights of linear and weakly nonlinear growths, and nonlinear evolutions of the hydrodynamic instabilities in ICF implosions, which has directly supported the research of ICF ignition target design. The ICF hot-spot ignition implosion design that uses several controlling features, based on our current understanding of hydrodynamic instabilities, to address shell implosion stability, has been briefly described, several of which are novel.

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