Laser ablation of Mg, Cu, and Pb using infrared and ultraviolet low-fluence lasers
Laser ablation of Mg, Cu, and Pb using infrared and ultraviolet low-fluence lasers
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DOI：
10.1063/1.1586980
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发表时间：
2003-07
影响因子：
3.2
通讯作者：
M. Qaisar;G. Pert
中科院分区：
文献类型：
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作者：
M. Qaisar;G. Pert
用改进的二维流体动力学程序POLLUX模拟了30 ns、0.248 μm KrF准分子激光和1.064 μm Nd-YAG激光在3-10 J/cm ~ 2能量密度下对镁、铜和铅靶在膨胀初期（<100 ns）的烧蚀。比较了不同注量KrF激光烧蚀镁的结果，发现与实验结果相当吻合。采用能量密度为10 J/cm 2的Nd-YAG激光器模拟了镁、铜和铅的激光烧蚀。的目标，烧蚀蒸汽质量，等离子体羽流的电离分数的表面温度的时间演变进行了研究，为每种材料。研究了不同材料烧蚀羽流的电子密度、电子温度和轴向速度的时间演化和空间分布，并对结果进行了比较。结果表明，羽流的膨胀遵循绝热行为，并随原子质量的增加而减慢。...
The modified two-dimensional hydrodynamic code POLLUX has been used to simulate the ablation of magnesium, copper, and lead targets in the early stage of expansion (<100 ns) by 30 ns, 0.248 μm KrF excimer and 1.064 μm Nd–YAG lasers at fluences of 3–10 J/cm2. The results of magnesium ablation using KrF laser with different fluences are compared and found to be in reasonably good agreement with the experimental results. A comparative study of laser ablation for magnesium, copper, and lead has been made by simulation using Nd–YAG lasers at fluence 10 J/cm2. The temporal evolution of surface temperature of the target, ablated vapor mass, and ionization fraction of plasma plume is studied for each material. The simulated temporal evolution and spatial distribution of electron density, electron temperature, and axial velocity of ablated plume of each material are studied and the results are compared. It is found that the plume expansion follows adiabatic behavior and is slowed down with increasing atomic mass. ...