一种激光驱动高压状态方程绝对测量方法的探索

The research of a method of absolute measurement for laser-driven high pressure equation of state

数值模拟了激光直接驱动铝飞片空腔靶的物理过程 ,模拟结果表明 ,如果靶结构参数与激光条件匹配 ,飞片与靶可以近似实现对称碰撞 ,而且冲击波在靶中存在稳定传播区 ,采用结构参数合理的飞片双面台阶靶 ,可能实现状态方程的绝对测量 .同时进行了实验探索 ,实验结果与数值模拟结果基本吻合 .

Numerical simulations of the whole physical process of aluminum flyer-vacuum-target directly driven by high power laser were presented. Simulation results showed that a symmetric impact will be realized between the flyer and the target and there is a wide stable area of shock wave propagation in the target if the parameters of flyer-vacuum-target and the conditions of laser match. And the absolute measurement of equation of state (EOS) may be approached if the structure parameters of flyer both-side-step-target are chosen reasonably. At the same time, the experimental researches of absolute measurement for EOS were conducted, and the experimental results are in accord with the simulation results on the whole.