We present an experimental study of the dynamics of shocks generated by the interaction of a double-spot laser in different kinds of targets: simple aluminum foils and foam–aluminum layered targets. The experiment was performed using the Prague PALS iodine laser working at 0.44 μm wavelength and irradiance of a few 1015 W/cm2. Shock breakouts for pure Al and for foam-Al targets have been recorded using time-resolved self-emission diagnostics. Experimental results have been compared with numerical simulations. The shocks originating from two spots move forward and expand radially in the targets, finally colliding in the intermediate region and producing a very strong increase in pressure. This is particularly clear for the case of foam layered targets, where we also observed a delay of shock breakout and a spatial redistribution of the pressure. The influence of the foam layer doped with high-Z (Au) nanoparticles on the shock dynamics was also studied.

中文翻译：

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泡沫分层目标中的冲击动力学和冲击碰撞

我们对双点激光在不同类型目标中相互作用产生的冲击动力学进行了实验研究：简单的铝箔和泡沫-铝层状目标。实验使用布拉格 PALS 碘激光器，工作波长为 0.44 μm，辐照度为 1015宽/厘米2. 已经使用时间分辨自发射诊断记录了纯铝和泡沫铝目标的冲击爆发。实验结果已与数值模拟进行了比较。来自两个点的冲击向前移动并在目标中径向扩展，最终在中间区域碰撞并产生非常强烈的压力增加。这对于泡沫分层目标的情况尤其明显，我们还观察到冲击爆发的延迟和压力的空间重新分布。掺杂高浓度泡沫层的影响Z还研究了 (Au) 纳米粒子对冲击动力学的影响。