A study of the laser plasma parameters at different laser wavelengths
A study of the laser plasma parameters at different laser wavelengths
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DOI：
10.1016/s0584-8547(02)00057-5
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发表时间：
2002-07-31
影响因子：
3.3
通讯作者：
Imam, H
中科院分区：
文献类型：
--
作者：
Abdellatif, G;Imam, H
采用光谱技术对激光产生的铝等离子体进行了诊断。使用波长为1064、532和355 nm的Q开关Nd：YAG激光器，最大能量分别为500、100和60 mJ，脉冲持续时间为7 ns，重复频率为1 Hz。进行测量，以确定的空间电子温度，使用玻尔兹曼图的Al II线和空间分布的电子密度使用斯塔克加宽公式为三个不同的激光波长。电子温度的最大可达到的值被发现在一定的距离远离靶表面取决于激光波长。电子密度在靶面附近达到最高值。测量，然后与现有的出版实验和理论进行比较，并发现与局部热力学平衡（LTE）的理论是一致的。(C)2002年由Elsevier Science B.V.出版
Diagnostic of laser produced aluminum plasma was performed adopting a spectroscopic technique. A Q-switched Nd:YAG laser at wavelengths 1064, 532 and 355 nm with maximum energies of 500, 100 and 60 mJ, respectively, and pulse duration of 7 ns with repetition rate of 1 Hz was used. The measurements were carried out to determine the spatial electron temperature using the Boltzmann plot for the Al II lines and the spatial profile of the electron density using Stark broadening formula for the three different laser wavelengths. The maximum attainable value of the electron temperature was found at a certain distance away from the target surface depending on the laser wavelength. The electron density reaches its highest value near the target surface. The measurements are then compared with available published experiment and theory and are found to be in agreement with the theory of local thermodynamic equilibrium (LTE). (C) 2002 Published by Elsevier Science B.V.