Spatial confinement effects of laser-induced breakdown spectroscopy at reduced air pressures
-
Published:2022-04-28
Issue:1
Volume:15
Page:
-
ISSN:2095-2759
-
Container-title:Frontiers of Optoelectronics
-
language:en
-
Short-container-title:Front. Optoelectron.
Author:
Hao Zhongqi,Deng Zhiwei,Liu Li,Shi Jiulin,He Xingdao
Abstract
AbstractSpatial confinement is a simple and cost-effective method for enhancing signal intensity and improving the detection sensitivity of laser-induced breakdown spectroscopy (LIBS). However, the spatial confinement effects of LIBS under different pressures remains a question to be studied, because the pressure of the ambient gas has a significant influence on the temporal and spatial evolution of plasma. In this study, spatial confinement effects of LIBS under a series of reduced air pressures were investigated experimentally, and the plasma characteristics under different air pressures were studied. The results show that the reduced air pressure can lead to both earlier onset and weakening of the enhancement effect of the spatial confinement on the LIBS line intensity. When the air pressure drops to 0.1 kPa, the enhancement effect of the emission intensity no longer comes from the compression of the reflected shock wave on the plasma, but from the cavity’s restriction of the plasma expansion space. In conclusion, the enhancement effect of spatial confinement technology on the LIBS is still effective when the pressure is reduced, which further expands the research and application field of spatial confinement technology.
Graphical abstract
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials
Reference37 articles.
1. Guo, L.B., Li, X.Y., Xiong, W., Zeng, X.Y., Lu, Y.F.: Recent technological progress in Asia from the first Asian symposium on laser-induced breakdown spectroscopy. Front. Phys. 11(6), 115208 (2016) 2. Li, W.T., Zhu, Y.N., Li, X., Hao, Z.Q., Guo, L.B., Li, X.Y., Zeng, X.Y., Lu, Y.F.: In situ classification of rocks using stand-off laser-induced breakdown spectroscopy with a compact spectrometer. J. Anal. At. Spectrom. 33(3), 461–467 (2018) 3. Li, W., Li, X.Y., Li, X., Hao, Z., Lu, Y., Zeng, X.: A review of remote laser-induced breakdown spectroscopy. Appl. Spectrosc. Rev. 55(1), 1–25 (2020) 4. Zhu, Z., Li, J., Guo, Y., Cheng, X., Tang, Y., Guo, L., Li, X., Lu, Y., Zeng, X.: Accuracy improvement of boron by molecular emission with a genetic algorithm and partial least squares regression model in laser-induced breakdown spectroscopy. J. Anal. At. Spectrom. 33(2), 205–209 (2018) 5. Li, Y., Tian, D., Ding, Y., Yang, G., Liu, K., Wang, C., Han, X.: A review of laser-induced breakdown spectroscopy signal enhancement. Appl. Spectrosc. Rev. 53(1), 1–35 (2018)
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|