A Comparative Study of the Laser Induced Breakdown Spectroscopy in Single- and Collinear Double-Pulse Laser Geometry  

作　　者：孙对兄 苏茂根 董晨钟 温冠宏 

机构地区：[1]Key Laboratory of Atomic and Molecular Physics&Functional Material of Gansu Province,College of Physics and Electronic Engineering,Northwest Normal University [2]Joint Laboratory of Atomic and Molecular Physics,Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences

出　　处：《Plasma Science and Technology》2014年第4期374-379,共6页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11274254,11364037,11064012);the JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics(No.11261140328);the International Scientic and Technologic Cooperative Project of Gansu Province,China(No.1104WCGA186)

摘　　要：Two Q-switched Nd：YAG lasers at 1064 nm wavelength have been employed to produce plasmas on aluminum-based alloy in single- and collinear double-pulse laser induced breakdown spectroscopy （LIBS）. Time resolved technique was used for detecting emission sig- nal by spectrometer equipped with ICCD detector. The intensity calibration of spectral response was performed by using deuterium and tungsten halogen lamps. Time evolution of the plasma temperature and electron number density was investigated in single- and collinear double-pulse experiments. Based on the investigation of plasma parameters, the emission signal enhancement mechanism was discussed qualitatively.Two Q-switched Nd：YAG lasers at 1064 nm wavelength have been employed to produce plasmas on aluminum-based alloy in single- and collinear double-pulse laser induced breakdown spectroscopy （LIBS）. Time resolved technique was used for detecting emission sig- nal by spectrometer equipped with ICCD detector. The intensity calibration of spectral response was performed by using deuterium and tungsten halogen lamps. Time evolution of the plasma temperature and electron number density was investigated in single- and collinear double-pulse experiments. Based on the investigation of plasma parameters, the emission signal enhancement mechanism was discussed qualitatively.

关 键 词：plasma diagnostics intensity calibration emission signal enhancement 

分 类 号：O53[理学—等离子体物理] TN249[理学—物理]