Laboratory radiative accretion shocks on GEKKO XII laser facility for POLAR project
Laboratory radiative accretion shocks on GEKKO XII laser facility for POLAR project
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POLAR 项目 GEKKO XII 激光设备的实验室辐射吸积冲击
DOI：
10.1017/hpl.2018.32
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发表时间：
2018
影响因子：
4.8
通讯作者：
Tomiya S
中科院分区：
文献类型：
--
作者：
Van Box Som L.;Falize E.;Koenig M.;Sakawa Y.;Albertazzi B.;Barroso P.;Bonnet-Bidaud J.-M.;Busschaert C.;Ciardi A.;Hara Y.;Katsuki N.;Kumar R.;Lefevre F.;Michaut C.;Michel Th.;Miura T.;Morita T.;Mouchet M.;Rigon G.;Sano T.;Shiiba S.;Shimogawara H.;Tomiya S
提出了一种模拟极地高能辐射吸积冲击的新目标设计。在本文中，我们介绍了在极地项目的GEKKO XII激光设备上获得的实验结果。将实验结果与二维FCI2模拟结果进行比较，表征碰撞前后等离子体流动的动力学和结构。模拟和实验数据之间的良好一致性证实了反向激波的形成，冷却损失开始改变后激波区域。在多材料结构下，靶体在实验和仿真中均表现出流体动力准直和反向激波耦合的辐射结构。在GEKKO XII上产生的激光能量的灵活性使我们能够产生高速流，并研究在LULI2000和猎户座激光设备上获得的新的有趣的辐射流体动力学机制。
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 confirms 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 of 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.