强激光与粒子束2026，Vol.38Issue(8)：13-62,50.DOI:10.11884/HPLPB202638.260192
我国激光聚变内爆流体力学不稳定性研究进展
Progress on hydrodynamic instabilities in laser driven fusion implosions in China
摘要
Abstract
As a key approach to controlled nuclear fusion,laser-driven inertial confinement fusion(ICF)has demonstrated scientific and engineering feasibility through achievinga target energy gain greater than one.On the path toward higher gain and future fusion energy applications,hydrodynamic instabilities during implosion remain a central physics challenge,with research breadth and depth continually expanding.Among these,target bulk perturbations—such as isolated defects,density nonuniformities,and inhomogeneous dopant distributions within the ablator—have become a research frontier.This paper summarizes major progress in China(mainly at IAPCM)over the past five years in three areas:defect evolution mechanisms,dynamically stabilized implosions using laser pulses,and weakly nonlinear growth of hydrodynamic instabilities.In defect physics,studies reveal that baroclinic vorticity deposition during shock-defect interaction is the fundamental seeding mechanism.Distinct evolution pathways for light-bubble and heavy-bubble defects,as well as their coupling with the ablation front,are clarified.Nonlinear amplification from multiple defects and significant fuel-ablator mixing enhancement due to three-dimensional vortex stretching are identified.The risk levels associated with defect locations in high-density carbon ablators are quantified,and it is shown that high-density tungsten-doped defects can induce interfacial jets by altering shock reflection configurations.An active control approach using an external transverse magnetic field to cancel fluid baroclinic vorticity via the magnetic baroclinic term is proposed.On dynamic stabilization,introducing a temporally modulated laser pulse during the main or pre-pulse generates an oscillatory acceleration field at the ablation front.By modifying the phase relation between density and pressure gradients,this field interrupts the sustained positive feedback accumulation of baroclinic vorticity,thereby suppressing perturbation growth induced by defects,surface roughness,and laser imprints.The two effects of"dynamic stabilization"and"parametric excitation"caused by modulation parameters are revealed,along with optimization principles.In analytical theory,a weakly-nonlinear third-order model for combined hydrodynamic instabilities in planar geometry is developed,showing that shear flow enhances the nonlinear effects of the Rayleigh-Taylor instability(RTI).A two-mode RTI model predicting the nonlinear saturation amplitude is further established,demonstrating the key role of mode coupling in determining the root-mean-square saturation amplitude.These achievements advance the understanding of ICF implosion hydrodynamic instabilities from three perspectives:mechanism understanding,active control,and theoretical modeling.China has established a comprehensive research capability integrating physics understanding,theoretical modeling,numerical simulation,and experimental validation,providing a robust physical foundation for high-gain target design and performance optimization toward future fusion energy.关键词
激光聚变/惯性约束聚变/高能量密度物理/内爆物理/流体力学不稳定性Key words
laser-driven fusion/inertial confinement fusion/high-energy-density physics/implosion physics/hydrodynamic instability分类
数理科学引用本文复制引用
王立锋,薛创,李志远,张超,杨国威,邹镇琪,戴鸿昊,韩衍曌,关本金,叶子昕,闫政,吴俊峰,张靖,雷柱,李俊,李纪伟,曹柱荣,缪文勇,方智恒,黄秀光,张华,李英骏,陈竹,丁永坤,邹士阳,王裴,赵宗清,张维岩,刘云星,赵凯歌,董佳钦,袁永腾,涂绍勇,尹传盛..我国激光聚变内爆流体力学不稳定性研究进展[J].强激光与粒子束,2026,38(8):13-62,50.基金项目
国家自然科学基金项目(12588301) （12588301）
国家重点研发计划项目(2023YFA1608400) （2023YFA1608400）
