在美国国家点火装置点火工程受阻的背景下，我国研究人员提出了多种新型的点火方式，它们对黑腔洞口尺寸提出了更高的要求；束匀滑技术是抑制激光等离子作用的必要手段，束匀滑焦斑的大尺寸和动态性质进一步让新需求下的穿孔特性变得复杂。本项目拟从研究高功率激光束匀滑焦斑的空间分布特性出发，明确影响束匀滑焦斑旁瓣的主要激光参数；实验研究各种束匀滑条件下激光激发靶孔等离子的条件，获得在等离子喷射条件下穿孔率与脉冲波形、靶孔大小之间的规律；分析激光在喷射等离子中的色散性质，并设计实验验证；研究多束激光并穿靶孔的图像，提出并穿条件下的光束叠加的方法；综合以上研究，建立高功率激光束匀滑条件下的穿孔模型，模型将在神光-Ⅲ原型装置上进行验证。该项目的研究不仅可为精密黑腔实验的开展提供激光边界条件，也可据此设计新型物理实验，同时为未来高功率激光器的设计和建设提供技术支撑，对促进ICF技术的发展具有重要的意义。

In experiments designed for indirect drive in inertial confinement fusion (ICF), High energy laser beams need to propagate through hohlraum target laser entrance hole (LEH) and proceed toward the hohlraums’s interior walls. The propagation is connected with the size of LEH and the laser focal spot property closely. In the background of the pause of The National Ignition Campaign (NIC), some new ignition modes are proposed in our country, whose LEHs size is more critical. Beam smoothing techniques are necessary to suppress Laser-plasma instabilities (LPI), but it makes the laser entrances’ propagation more complex for its larger and motional spot. In this project, four aspects will be researched. First, the high power smoothed laser spot’s spatial character will be analyzed to obtain the main influencing factor of focal spot wings. Second, the conditions of laser exciting plasma from hole will be experimented to obtain the influence laws of laser energy injection efficiency response with pulse shape and LEH size. Third, the laser dispersion property in the “blow-off” plasma from hole will be simulated and proved by experiments. Fourth, the image of multi-beams propagating through LEH at the same time will be explored to obtain the superposed method of multi-beams. The results are synthesized to create a model that high power smoothed laser propagates through LEH, the model will be proved on SG-Ⅲ prototype facility. This project will promote the development of ICF techniques that it is not only providing the laser boundary condition of precise hohlraum experiments, but also support the construction of high power laser facility in future.