Effect of cylindrical cavity height on laser-induced breakdown spectroscopy with spatial confinement |
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| Authors: | Junfeng SHAO Tingfeng WANG Jin GUO Anmin CHEN Mingxing JIN |
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| Affiliation: | 1. State Key Laboratory of Laser Interaction with Matter & Innovation Laboratory of Electro-Optical Countermeasures Technology, 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;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University), Changchun 130012, People's Republic of China;3. State Key Laboratory of Laser Interaction with Matter & Innovation Laboratory of Electro-Optical Countermeasures Technology, 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;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University), Changchun 130012, People's Republic of China |
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| Abstract: | In this paper,we present a study on the spatial confinement effect of laser-induced plasma with a cylindrical cavity in laser-induced breakdown spectroscopy(LIBS).The emission intensity with the spatial confinement is dependent on the height of the confinement cavity.It is found that,by selecting the appropriate height of cylindrical cavity,the signal enhancement can be significantly increased.At the cylindrical cavity(diameter = 2 mm) with a height of 6 mm,the enhancement ratio has the maximum value(approximately 8.3),and the value of the relative standard deviation(RSD)(7.6%) is at a minimum,the repeatability of LIBS signal is best.The results indicate that the height of confinement cavity is very important for LIBS technique to reduce the limit of detection and improve the precision. |
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| Keywords: | LIBS spatial confinement cavity height signal enhancement |
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