Theoretical analysis of the model of flyer-three-step-target with laser driving: Using in absolute measurement of equation-of-state

We present the numerical calculation of the model of aluminum flyer-vacuum- target with high power laser driving. The results show that the parameters of laser and target's structure have great effects on the state of flyer an d the character of shock-waves in the target. if we select the parameters o f laser and target's structure reasonably, we can achieve approximately sym metric impact between flyer and target;moreover, the shock-wave in the targ et has a stable area with a certain spatial width. So, if we choose the thr ee-step-target with a suitable thickness, we can approach an absolute measu rement of equation-of-state.