论文标题
在流体动力模拟中实施微物理模型，以研究用于直接驱动内爆的介电烧蚀材料中的初始血浆形成
Implementing a microphysics model in hydrodynamic simulations to study the initial plasma formation in dielectric ablator materials for direct-drive implosions
论文作者
论文摘要
一个微物理学模型，用于描述像塑料（如塑料）中的光电离电过程和影响电离过程，已在平面和球形靶标的一维水力学代码中实施。目前，在激光驱动器的早期阶段的初始血浆形成以临时方式建模，直到临界表面的形成为止。与临时模型相比，基于物理模型的实施预测电子温度和压力的值更高。此外，数值预测与以前对塑料烧蚀器中发光机制的实验观察一致。对于平面目标，观察到目标的后端减压与最近的实验相似。该模型的应用是了解由单个梁斑点引起的不均匀激光照射引起的激光刻板机制。
A microphysics model to describe the photoionization and impact ionization processes in dielectric ablator materials like plastic has been implemented into the one-dimensional hydrodynamic code LILAC for planar and spherical targets. At present, the initial plasma formation during the early stages of a laser drive is modeled in an ad hoc manner, until the formation of a critical surface. Implementation of the physics-based models predicts higher values of electron temperature and pressure than the ad hoc model. Moreover, the numerical predictions are consistent with previous experimental observations of the shine-through mechanism in plastic ablators. For planar targets, a decompression of the rear end of the target was observed that is similar to recent experiments. An application of this model is to understand the laser-imprint mechanism that is caused by nonuniform laser irradiation due to a single beam speckle.
