Title: Laboratory radiative accretion shocks on GEKKO XII laser facility for POLAR project Show Chinese title

Title: POLAR项目在GEKKO XII激光设施上的实验室辐射吸积冲击波

Abstract: A new target design is presented to model high-energy radiative accretion shocks in polars. In this paper, we present the experimental results obtained on the GEKKO XII laser facility for the POLAR project. The experimental results are compared with 2D FCI2 simulations to characterize the dynamics and the structure of plasma flow before and after the collision. The good agreement between simulations and experimental data confirm the formation of a reverse shock where cooling losses start modifying the post-shock region. With the multi-material structure of the target, a hydrodynamic collimation is exhibited and a radiative structure coupled with the reverse shock is highlighted in both experimental data and simulations. The flexibility on the laser energy produced on GEKKO XII, allowed us to produce high-velocity flows and study new and interesting radiation hydrodynamic regimes between those obtained on the LULI2000 and Orion laser facilities. Show Chinese abstract

Abstract: 提出了一种新的目标设计，用于模拟极地中的高能辐射吸积冲击波。 本文介绍了POLAR项目在GEKKO XII激光设施上获得的实验结果。 将实验结果与二维FCI2模拟进行了比较，以表征碰撞前后的等离子体流动力学和结构。 模拟与实验数据之间的良好一致性证实了反向冲击波的形成，冷却损失开始改变冲击后区域。 通过目标的多材料结构，展示了流体力学的集束现象，并且在实验数据和模拟中都突显出与反向冲击波耦合的辐射结构。 在GEKKO XII上产生的激光能量的灵活性使我们能够在LULI2000和Orion激光设备所获得的结果之间产生高速流动，并研究新的、有趣的辐射流体力学状态。