类冲击点火脉冲驱动下CH平面靶激光靶耦合特性实验研究

Laser coupling feature of low-Z targets is a fundamental and crucial research topic in the field of direct-driven inertial confinement fusion (ICF). A new inspiring ignition concept with high-gain has been proposed as shock ignition, it is hence of great importance to investigate the coupling feature of CH targets experimentally under shock ignition. Based on the Shenguang-III prototype laser facility, this project will carry out experiments on CH planar targets ablated by smoothed laser to investigate the laser coupling feature of CH planar targets, mainly including the laser absorption feature as well as the production and conduction of laser shocks when laser intensity is higher than 10^15 W/cm^2. As one of the sticking points of resolved experiments for shock ignition, this study will be beneficial not only to the physical cognition of laser plasma nonlinear interaction, but also to the further understanding of shock ignition mechanism. In addition, scientific experimental foundation will be laid for the feasibility validation of shock ignition.

激光低Z靶耦合特性是直接驱动惯性约束聚变（ICF）中的基础性关键课题之一。随着新型高增益点火模式——冲击点火概念的提出，开展冲击点火条件下激光CH靶耦合特性的实验研究具有重要意义。本项目拟基于神光III原型激光装置开展束匀滑激光直接加热CH平面靶的实验，研究类冲击点火的双脉冲驱动条件下激光CH平面靶耦合特性，主要包括激光功率密度高于10^15 W/cm^2时的激光等离子体非线性相互作用以及超强冲击波产生和传播过程。本研究是冲击点火分解实验的关键问题之一，不仅能够加强对激光等离子体非线性相互作用的物理认识，更有助于深入理解冲击点火机制，并为验证冲击点火可行性提供科学实验基础。

激光低Z靶耦合特性是直接驱动惯性约束聚变（ICF）中的基础性关键课题之一。随着新型高增益点火模式——冲击点火概念的提出，开展冲击点火条件下激光CH靶耦合特性的实验研究具有重要意义。本项目基于神光III原型激光装置开展了束匀滑激光直接加热CH平面靶的实验，获得了不同激光入射条件下表征激光靶耦合的系列实验数据，并模拟研究了冲击波匹配的基本规律。 本研究是冲击点火分解实验的关键问题之一，不仅能够加强对激光等离子体非线性相互作用的物理认识，更有助于深入理解冲击点火机制，并为验证冲击点火可行性提供科学实验基础。