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整形激光直接驱动准等熵压缩实验技术对新材料科学、冲击波物理、地球物理学研究等领域有重要意义.设计特定的实验条件,可以将材料压缩到冲击压缩和等熵压缩都无法达到的状态,从而为材料研究提供新的技术途径.介绍了在神光III原型装置上开展的直接驱动准等熵压缩实验,对理论基础、实验靶型、实验结果、关键技术、实验特点和数据都进行了较详细的分析.通过实验和相应的数据处理程序,获得了加载面上压力超过400 GPa的数据,这是目前国际上用激光直接驱动的方式获得的Al材料中最高的压力.同时,对经过Li F窗口获得的表观粒子速度与真实粒子速度的关系进行了分析,获得了一条对表观粒子速度进行动态修正的曲线,从而使粒子速度的计算更加准确.对实验的改进方向进行了比较明确的分析.所提供的数据和分析过程对该领域的研究人员有一定的参考价值.
The plastic laser direct-drive quasi-isentropic compression experimental technique is of great importance to the fields of new material science, shock wave physics and geophysics, etc. The specific experimental conditions can be designed to compress the material to a state that can not be achieved by impulse compression and isentropic compression , So as to provide a new technical approach for material research.The direct drive quasi-isentropic compression experiment carried out on SG-III prototype device is introduced, and the theoretical basis, experimental target type, experimental results, key technologies, experimental characteristics and data are all carried out A more detailed analysis was obtained.According to the experiment and the corresponding data processing program, the data of the pressure on the loading surface exceeding 400 GPa was obtained, which is the highest pressure in the Al material obtained by the laser direct driving method in the world at the same time. The relationship between the apparent particle velocity and the true particle velocity obtained through the Li F window was analyzed and a curve was obtained to dynamically modify the apparent particle velocities so that the particle velocity could be calculated more accurately.The improvement direction of the experiment A clearer analysis The data and analysis provided provide some guidance to researchers in this area Value.