激光诱导炉渣等离子体信号的稳定性研究  

Study on the Stability of Laser Induced Slag Plasma Signal

作　　者：马翠红 马云望 Ma Cuihong;Ma Yunwang(College of Electrical Engineering,North China University of Science and Technology,Tangshan,Hebei 063210,China)

机构地区：[1]华北理工大学电气工程学院,河北唐山063210

出　　处：《应用激光》2020年第1期115-119,共5页Applied Laser

基　　金：国家自然科学基金(项目编号:61171058)。

摘　　要：激光诱导等离子体受激光能量大小、激光频率、样品特性、采集延时等实验参数的影响,这些因素变动直接影响物质成分定量分析的准确性。本文搭建激光诱导击穿光谱实验平台,以炉渣为研究背景,以炉渣中原子谱线CaI:428.28 nm、离子谱线CaII:393.37 nm和Si原子谱线SiI:252.91 nm为研究对象,观察信号强度随采集延时、激光能量的波动和激光聚焦位置的变化规律。通过实验测得最佳延时时间为1us时信号强度最好,激光能量的波动对信号的影响并无明显影响,激光聚焦位置在样品表面以下2-3 mm处为最佳实验条件。Laser-induced plasma is affected by experimental parameters such as laser energy size, laser frequency, sample characteristics, and acquisition delay. These factors directly affect the accuracy of quantitative analysis of material components. In this paper, a laser induced breakdown spectroscopy experimental platform was built. The slag was used as the research background. The atomic line CaI: 428.28 nm, ion line CaII: 393.37 nm and Si atom line SiI: 252.91 nm were used as the research object to observe the signal intensity. With the acquisition delay, fluctuations in laser energy and changes in the laser focus position. The best time delay is 1 us, and the signal intensity is the best. The fluctuation of laser energy has no obvious influence on the signal. The laser focus position is the best experimental condition at 2-3 mm below the sample surface.

关 键 词：激光诱导击穿光谱技术 炉渣 激光能量 激光频率 样品特性 

分 类 号：TN249[电子电信—物理电子学]