克服大气环境干扰的激光诱导等离子体光谱技术研究  

Study on the laser induced breakdown spectroscopy overcoming the interferer from atmosphere

作　　者：吕刚[1] 亓洪兴[1] 潘明忠[1] 何志平[1] 闫志欣[1] 舒嵘[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海200083

出　　处：《激光与红外》2010年第4期354-357,共4页Laser & Infrared

基　　金：国家自然科学基金项目(No.60678057)资助

摘　　要：介绍了激光诱导等离子体光谱技术的工作原理,通过阐述激光诱导等离子体光谱产生的物理机制解释了大气分子干扰固态样本测量结果的原因,建立了既能够提供低气压工作环境又方便实用的激光诱导等离子体光谱探测装置,开展了低气压环境下的试验研究,证明了大气分子元素干扰固态样本测量结果的客观存在,同时证明了低气压环境能够有效避免或者缓解大气分子干扰问题的可行性。The working principle of the laser induced breakdown spectroscopy（LIBS） is introduced.How the atmosphere interferes in the LIBS result of the solid samples is interpreted by expatiating the physical principle of generating the plasma spectrum.A LIBS experimental system for the low pressure condition was setup and the convenient experiments at the low pressures were carried out.The possibility of the interferer from the atmosphere is testified.The feasibility of the idea carrying on LIBS experiment at low pressure to overcome atmosphere interfere is validated.

关 键 词：激光诱导等离子体光谱技术 大气分子干扰 低气压 雪崩电离 多光子吸收电离 

分 类 号：TN247[电子电信—物理电子学] TH744.11[机械工程—光学工程]