整形激光加载的一维准等熵压缩仿真  

Simulation of one-dimensional quasi-isentropic compression driven by temporal shaped laser

作　　者：薛全喜[1,2] 江少恩[2] 王哲斌[2] 章欢[2] 叶锡生[1] 张永生[1] 

机构地区：[1]西北核技术研究所激光与物质相互作用国家重点实验室,西安710024 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2013年第11期2891-2894,共4页High Power Laser and Particle Beams

基　　金：激光与物质相互作用国家重点实验室基金项目(SKLLIM1006-01);国家自然科学基金项目(11005097);中国工程物理研究院科学技术发展基金项目(2010A0102003)

摘　　要：基于凝聚态物质等熵线推导了理想等熵假设前提下的加载压力和加载激光波形,进而将其作为输入条件,利用辐射流体力学程序MULTI开展了Al材料的一维准等熵压缩仿真,通过材料温度、压强、密度、粒子速度和熵增五个参量描述了准等熵加载的物理过程。结果显示得到了高等熵程度加载过程,可为即将开展的整形激光加载的准等熵实验提供参考。The pulse shapes of loading pressure and driven laser were deduced based on compression isentrope of condensed matter, and the ramp compression simulations of aluminum were performed by hydrodynamic code MULTI. The process of the ramp compression is described with the following parameters： temperature, pressure, density, particle velocity and entropy pro duction. Resuhs show that the entropy production of the ramp compression process is small. This work can provide important supports for laser-driven ramp compression experiments in near future.

关 键 词：准等熵压缩 熵增 压缩波 整形激光 

分 类 号：O532[理学—等离子体物理] TN249[理学—物理]