激光诱导Cu合金等离子体光谱特性实验研究

Experimental investigation on the properties of laser induced plasma spectroscopy of cuprum alloy

采用调Q Nd:YAG激光器激发诱导Cu合金的等离子体,系统研究了等离子体光谱强度随时间演化特性,并探究了不同环境气氛对激光诱导等离子体光谱强度的影响.实验结果表明:信噪比最佳的延时选择与分析光谱线激发电位密切相关,而受环境气氛、分析元素的熔点、沸点影响不大;氩气和氦-氩混合气体环境与空气环境相比,激光诱导等离子体光谱强度明显增强.

Laser induced plasma of cuprum alloy was excited by Nd：YAG laser.Temporal characteristic of spectroscopy and influence that different ambient atmospheres worked to the intensity of spectroscopy were systemic investigated.The experimental result suggests that the choice of time to acquire the best spectrum is hardly related to ambient atmosphere,the melting point and boiling point of elements,it rests with the excitation potential of the spectral line;Compared with air,argon and mixture consisted of helium and argon makes the intensity of laser induced plasma spectroscopy increased significantly.