Paper
21 March 2023 Improvement on the plasma excitation probability of aerosol particles based on aerodynamic lens
Yun He, Hongyu He, Zhixing Gao
Author Affiliations +
Proceedings Volume 12595, Advanced Fiber Laser Conference (AFL2022); 1259526 (2023) https://doi.org/10.1117/12.2669005
Event: Advanced Fiber Laser Conference (AFL2022), 2022, Changsha, China
Abstract
Aerodynamic lenses can increase the local particle number density of the aerosol beam. The particle number density of aerosol has an important effect on the excitation probability and spectral intensity of laser-induced plasma. Therefore, aerodynamic lenses have the potential to improve the identification efficiency of Laser Induced Breakdown Spectroscopy (LIBS) in aerosol real-time monitoring. In this study, the effects of an aerodynamic lens on laser excited aerosol particles were developed by experiments and simulations. The process of aerosol beam passing through an aerodynamic lens was simulated by using the CFD software FLUENT. The simulation results show that the setup can increase the aerosol concentration by three orders of magnitude. The Aerosol Focusing-Laser Induced Breakdown Spectroscopy (Aerosol Focusing-LIBS) experimental setup is established. The experimental and simulation results are in good agreement. And the experimental results show that the laser excitation probability has increased by about 5 times, the average intensity of the excitation spectrum has increased by about three times.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yun He, Hongyu He, and Zhixing Gao "Improvement on the plasma excitation probability of aerosol particles based on aerodynamic lens", Proc. SPIE 12595, Advanced Fiber Laser Conference (AFL2022), 1259526 (21 March 2023); https://doi.org/10.1117/12.2669005
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KEYWORDS
Aerosols

Laser induced breakdown spectroscopy

Atmospheric particles

Simulations

Spectroscopy

Plasma

Environmental monitoring

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