Enhancing silicon spectral emission in LIBS using Tesla coil discharge  

作　　者：Shuang CUI Yang LIU Anmin CHEN Mingxing JIN 崔爽;刘扬;陈安民;金明星(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,People’s Republic of China;Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,People’s Republic of China)

机构地区：[1]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,People’s Republic of China [2]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第12期132-139,共8页等离子体科学和技术（英文版）

基　　金：the support by the National Key Research and Development Program of China(No.2019YFA0307701);National Natural Science Foundation of China(Nos.11674128,11674124 and 11974138)。

摘　　要：Laser-induced breakdown spectroscopy(LIBS)is a powerful technique for elemental analysis,offering rapid analysis,minimal sample preparation,wide elemental coverage,and portability.To enhance the detection sensitivity of LIBS,increasing the spectral emission intensity is crucial.This paper explores the use of Tesla coil(TC)discharge as an alternative to spark discharge in silicon LIBS.The study examines the influence of TC discharge on both time-integrated and timeresolved spectra,with and without TC discharge;the corresponding electron temperature and density are obtained.The results show that TC discharge significantly amplifies the spectral intensity,improving signal sensitivity in LIBS analysis.Specifically,in the laser energy range from 7.4 to 24.0 mJ,TC discharge increased the average spectral line intensities of Si(II)385.60 nm and Si(I)390.55 nm by factors of 8.4 and 5.1,respectively.Additionally,the average electron temperature and density were enhanced by approximately 3.2%and 4.2%,respectively,under TC discharge.The advantages of TC discharge include higher energy deposition,extended discharge duration,reduced electrode erosion,and enhanced safety.This research contributes to advancing LIBS technology and expanding its applications in various fields.

关 键 词：LIBS Tesla coil spectral enhancement SILICON 

分 类 号：TN249[电子电信—物理电子学] O433[机械工程—光学工程]