Supernova-relevant Hydrodynamic Instability Experiments on the Nova Laser
Supernova-relevant Hydrodynamic Instability Experiments on the Nova Laser
复制标题
Nova 激光器上与超新星相关的流体动力学不稳定性实验
DOI：
10.1086/310556
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
A. Rubenchik
中科院分区：
文献类型：
--
作者：
J. Kane;W. D. Arnett;B. Remington;S. Glendinning;A. Rubenchik
超新星1987 A将注意力集中在流体动力学不稳定性在超新星演化中的关键作用上。为了测试这些不稳定性的模型，我们正在开发实验室实验的流体动力学混合条件下有关的超新星。该靶由双层平面封装组成，由85 μm Cu和500 μm CH 2支撑，在界面处具有单模正弦扰动，λ = 200 μm，η0 = 20 μm。Nova激光器用于在界面处产生10-15 Mbar [（10-15）× 1012 dyne cm 2]的冲击波，该冲击波由于Richtmyer-Meshkov不稳定性而引发扰动增长，随后随着界面减速而引发Rayleigh-Taylor不稳定性。这类似于一个II型超新星在中间时间的He-H界面的流体动力学，高达103秒的几倍。实验是使用流体动力学代码HYADES和CALE和超新星代码PROMETHEUS建模的。实验和模拟的结果。
Supernova 1987A focused attention on the critical role of hydrodynamic instabilities in the evolution of supernovae. To test the modeling of these instabilities, we are developing laboratory experiments of hydrodynamic mixing under conditions relevant to supernovae. The target consists of a two-layer planar package composed of 85 μm Cu backed by 500 μm CH2, having a single-mode sinusoidal perturbation at the interface, with λ = 200 μm and η0 = 20 μm. The Nova Laser is used to generate a 10-15 Mbar [(10-15) × 1012 dyne cm2] shock at the interface, which triggers perturbation growth as a result of the Richtmyer-Meshkov instability, followed by the Rayleigh-Taylor instability as the interface decelerates. This resembles the hydrodynamics of the He-H interface of a Type II supernova at intermediate times, up to a few times 103 s. The experiment is modeled using the hydrodynamics codes HYADES and CALE and the supernova code PROMETHEUS. Results of the experiments and simulations are presented.