光谱学与光谱分析, 2014, 34 (12): 3230, 网络出版: 2014-12-08
激光诱导击穿空气等离子体光谱及半经验理论模拟
Spectroscopic Study of Laser Induced Breakdown Plasma Spectroscopy in Air and Semi-Empirical Simulation
激光诱导击穿光谱 光谱模拟 局域热动平衡 Laser induced breakdown spectroscopy Spectral simulation Local thermodynamic equilibrium
摘要
利用Nd∶YAG激光器输出的1 064 nm激光进行了激光诱导击穿空气光谱实验, 测量了空气等离子体的时间分辨光谱。 基于局域热动力学平衡模型, 建立了模拟激光诱导击穿光谱的方法。 对700~900 nm波段的空气等离子体光谱进行了模拟。 通过模拟结果与实验结果的比较, 进一步估算出了空气中氮、 氧和氩的相对含量。
Abstract
A laser induced breakdown spectroscopy experiment was carried out using Nd∶YAG laser in air, and time-resolved spectra were measured. Based on local thermodynamic equilibrium assumption, a method used to simulate LIBS spectra is proposed. A LIBS spectrum of air in the wavelength range of 700~900 nm was simulated using this method. A good agreement between experiment and simulation was obtained, and moreover, the relative concentrations of the N, O and Ar in air were obtained.
孙对兄, 苏茂根, 董晨钟, 马云云, 杨峰, 曹世权. 激光诱导击穿空气等离子体光谱及半经验理论模拟[J]. 光谱学与光谱分析, 2014, 34(12): 3230. SUN Dui-xiong, SU Mao-gen, DONG Chen-zhong, MA Yun-yun, YANG Feng, CAO Shi-quan. Spectroscopic Study of Laser Induced Breakdown Plasma Spectroscopy in Air and Semi-Empirical Simulation[J]. Spectroscopy and Spectral Analysis, 2014, 34(12): 3230.