Laser induced plasma on copper target, a non-equilibrium model
Laser induced plasma on copper target, a non-equilibrium model
复制标题
DOI：
10.1063/1.4864647
复制
发表时间：
2014-02
影响因子：
2.2
通讯作者：
Amina Ait Oumeziane;B. Liani;J. Parisse
中科院分区：
文献类型：
--
作者：
Amina Ait Oumeziane;B. Liani;J. Parisse
本文的目的是建立一个综合的紫外激光烧蚀金属靶的数值模型，重点研究了激光诱导等离子体阈值的预测、激光与等离子体相互作用的影响以及激光诱导羽流及其在背景气体中膨胀过程中电子不平衡的重要性。本文描述了一套193-248和355nm激光与铜靶之间的激光-物质相互作用的数值模型。结合脉冲激光照射材料内部产生的热效应，对激光蒸发物质相互作用和等离子体形成过程进行了全面的模拟。在激光诱导羽流中，研究了电子不平衡和激光束吸收。我们计算的等离子体在铜靶上的点火阈值已得到验证，并与实验和理论结果进行了比较。与实验数据的比较表明，我们的结果是良好的。
The aim of this work is to present a comprehensive numerical model for the UV laser ablation of metal targets, it focuses mainly on the prediction of laser induced plasma thresholds, the effect of the laser-plasma interaction, and the importance of the electronic non-equilibrium in the laser induced plume and its expansion in the background gas. This paper describes a set of numerical models for laser-matter interaction between 193-248 and 355 nm lasers and a copper target. Along with the thermal effects inside the material resulting from the irradiation of the latter with the pulsed laser, the laser-evaporated matter interaction and the plasma formation are thoroughly modelled. In the laser induced plume, the electronic nonequilibrium and the laser beam absorption have been investigated. Our calculations of the plasmas ignition thresholds on copper targets have been validated and compared to experimental as well as theoretical results. Comparison with experiment data indicates that our results are in goo...