实验参数对激光诱导铝合金产生等离子体光谱的影响

摘要

利用Nd:YAG脉冲激光诱导击穿2519A铝合金产生等离子体光谱,采用光谱仪检测和记录了Al和Cu的原子谱线,并研究了不同实验参数或条件对该谱线的影响.结果表明,透镜到样品表面距离、探测角度、激光脉冲能量、观测高度和环境气压大小对实验分析性能,如谱线强度、信背比和实验可重复性等均有较大的影响,通过设置适当的实验条件可以获得最佳的实验结果.%Laser-induced breakdown spectroscopy (LIBS) has been used to detect the elements of 2519A aluminum alloy by Nd: YAG laser in the present paper. The atomic spectral lines of Al and Cu were observed using a portable spectrometer. The impacts of lens-to-sample distance, probe angle, laser pulse energy, observation height and ambient pressure on the line intensities were studied. The results show that all these experimental parameters have great influence on the precision of LIBS such as line intensity, signal to background ratio and repeatability. Finally, the best results can be observed by using the optimum experimental conditions.