在神光III原型装置上,利用8路激光间接驱动充高气压DT靶丸,开展小收缩比内爆实验.实验中测量得到中子产额、离子温度、聚变反应速率峰值时刻(bangtime)等关键物理量,以及它们随烧蚀层厚度变化的规律.从定性和定量两个方面对实验结果进行了分析讨论,推测流体力学不稳定性和内爆不对称性是导致实验结果与一维辐射流体计算结果不一致的原因. In Shen-Guang III prototype device, 8-way laser was used to indirectly drive high-pressure DT target pellets to carry out the experiment of small shrinkage ratio implosion. The neutron yield, ion temperature, peak time of fusion reaction and other key Physical quantities and their changes with the thickness of the ablated layer.The experimental results were analyzed and discussed qualitatively and quantitatively.The speculation that the hydrodynamic instability and the implosion asymmetry are the results of the experiment and the one-dimensional radiation fluid calculation The reason for inconsistent results.