Spectral Enhancement of Laser-Induced Breakdown Spectroscopy in External Magnetic Field  

作　　者：李丞 高勋 李奇 宋超 林景全 

机构地区：[1]School of Science,Changchun University of Science and Technology [2]School of Chemistry & Environmental Engineering,Changchun University of Science and Technology

出　　处：《Plasma Science and Technology》2015年第11期919-922,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.61178022);the Natural Science Foundation of Jilin Province,China(No.201215132);the Doctoral Program of High Education of China(No.20112216120006)

摘　　要：In this paper the spectral enhancement of laser-induced breakdown spectroscopy （LIBS） for copper plasma in the presence of a magnetic field is investigated and the temporal- and spatial-resolved plasma emission spectra are analyzed. Experimental results show that the copper plasma atomic and ion spectra have been enhanced in the presence of the external magnetic field. In addition, the Cu I 521.82 nm spectral intensity evolution with delay time appears to have a double peak around the delay time of 2 μs, but that of Cu II 507.57 nm has a sharp decrease because of the electron-atom three body recombination process. The plasma temperature with magnetic confinement is lower than that of the case in the absence of magnetic fields. Finally, the spectral enhancement mechanisms of laser induced breakdown spectroscopy with magnetic confinement are analyzed.In this paper the spectral enhancement of laser-induced breakdown spectroscopy （LIBS） for copper plasma in the presence of a magnetic field is investigated and the temporal- and spatial-resolved plasma emission spectra are analyzed. Experimental results show that the copper plasma atomic and ion spectra have been enhanced in the presence of the external magnetic field. In addition, the Cu I 521.82 nm spectral intensity evolution with delay time appears to have a double peak around the delay time of 2 μs, but that of Cu II 507.57 nm has a sharp decrease because of the electron-atom three body recombination process. The plasma temperature with magnetic confinement is lower than that of the case in the absence of magnetic fields. Finally, the spectral enhancement mechanisms of laser induced breakdown spectroscopy with magnetic confinement are analyzed.

关 键 词：laser induced breakdown spectroscopy spectral enhancement magnetic confinement 

分 类 号：TN249[电子电信—物理电子学]