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Published on: September 3, 2010
Classification and selective collection of individual aerosol particles using laser-induced fluorescence
Vasanthi Sivaprakasam1, Timothy Pletcher, John E Tucker
1Optical Sciences Division, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375, USA. sivaprak@ccs.nrl.navy.mil
Abstract:
We describe the development and performance evaluation of a system for optical interrogation, subsequent selection, and collection of individual aerosol particles entrained in an inlet air stream. Elastic scatter and laser-induced fluorescence obtained from single particles on-the-fly provide compositional information for classification criteria. Individual particles could then be selectively electrically charged and captured to a conductive substrate with an electric potential. The optical subsystem also includes a novel two-beam velocimeter to provide accurate downstream timing. Good overall quantitative performance values are reported for particles in the size range of 1-8 microm at mean rates up to 4 kHz.
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