Separating hazardous aerosols from ambient aerosols: role of fluorescence-spectral determination, aerodynamic deflector, and pulse aerodynamic localizer (PAL)

Yong-Le Pan; Patrick J. Cobler; Scott A. Rhodes; Justin Halverson; Richard K. Chang

doi:10.1117/12.634335

28 October 2005 Separating hazardous aerosols from ambient aerosols: role of fluorescence-spectral determination, aerodynamic deflector and pulse aerodynamic localizer (PAL)

Yong-Le Pan, Patrick J. Cobler, Scott A. Rhodes, Justin Halverson, Richard K. Chang

Author Affiliations +

Proceedings Volume 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II; 59900Y (2005) https://doi.org/10.1117/12.634335
Event: European Symposium on Optics and Photonics for Defence and Security, 2005, Bruges, Belgium

Abstract

An aerosol deflection technique based on the single-shot UV-laser-induced fluorescence spectrum from a flowing particle is presented as a possible front-end bio-aerosol/hazardous-aerosol sensor/identifier. Cued by the fluorescence spectra, individual flowing bio-aerosol particles (1-10 um in diameter) have been successfully deflected from a stream of ambient aerosols. The electronics needed to compare the fluorescence spectrum of a particular particle with that of a pre-determined fluorescence spectrum are presented in some detail. The deflected particles, with and without going through a funnel for pulse aerodynamic localization (PAL), were collected onto a substrate for further analyses. To demonstrate how hazardous materials can be deflected, TbCl₃⋅6H₂O (a stimulant material for some chemical forms of Uranium Oxide) aerosol particles (2 μm in diameter) mixed with Arizona road dust was separated and deflected with our system.

Citation Download Citation

Yong-Le Pan, Patrick J. Cobler, Scott A. Rhodes, Justin Halverson, and Richard K. Chang "Separating hazardous aerosols from ambient aerosols: role of fluorescence-spectral determination, aerodynamic deflector and pulse aerodynamic localizer (PAL)", Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 59900Y (28 October 2005); https://doi.org/10.1117/12.634335

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