中国激光, 2010, 37 (3): 877, 网络出版: 2010-03-11
激光烧蚀铁靶的等离子体特性
Plasma Characteristics of Metal Fe Ablated by Pulsed Laser
激光技术 激光烧蚀 等离子体发射光谱 电子温度 电子密度 laser technique laser ablation plasma emission spectroscopy electron temperature electron density
摘要
利用YAG脉冲激光烧蚀(PLA)空气环境中的Fe靶,观测激光诱导等离子体发射光谱。采用不同脉冲能量,对380.0-420.0 nm的等离子体发射光谱进行了时间、空间分辨研究。在局部热力学平衡条件下,根据所测谱线的相对强度,利用Saha方程得到等离子体电子温度约为104 K。根据测得谱线的半峰全宽(FWHM),推得等离子体电子密度约为1017 cm-3。给出了靶面附近等离子体电子温度、电子密度的时间及空间演化规律。
Abstract
Laser-induced plasma spectroscopy of Fe target in air is investigated. Time and space-resolved spectra in the wavelength range of 380.0-420.0 nm are measured at different laser pulse energies. Under the model of local thermodynamic equilibrium,electronic temperature of Fe plasma is deduced to be around 104 K with assistance of Saha equation. Electron density of Fe plasma is obtained to be about 1017 cm-3 by use of the full-width at half maximum (FWHM) of Fe spectral lines. Spatio-temporal evolution,electron temperature as well as electron density near the target are presented.
高勋, 郭凯敏, 宋晓伟, 谭勇, 厉宝增, 李海军, 林景全. 激光烧蚀铁靶的等离子体特性[J]. 中国激光, 2010, 37(3): 877. Gao Xun, Guo Kaimin, Song Xiaowei, Tan Yong, Li Baozeng, Li Haijun, Lin Jingquan. Plasma Characteristics of Metal Fe Ablated by Pulsed Laser[J]. Chinese Journal of Lasers, 2010, 37(3): 877.
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