Electrodynamic Aerosol Concentrating and Sampling
Final rept. Feb 2005-27 Apr 2006
RESEARCH TRIANGLE INST (RTI) RESEARCH TRIANGLE PARK NC
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The objective was to develop an electrodynamic bioaerosol concentrator with low energy requirements. A new low loss charger was developed for large particles. The charged particles were introduced into the quadrupole energized up to 10 kV AC in a flowing gas stream of about 0.8 Lpm. The 3 micron diameter polystyrene latex particles were focused to the center line of the electrodes. A He-Ne laser was aligned with the center line of the electrodes and the focusing was observed from scattered light. A fundamental model was developed and compared to the experimental conditions. The particle charge and residence time were observed to be most important. Frequency was found to be insignificant. The best application of this device might be to focus bioaerosol into the focal point of an optical particle detection system.
- Lasers and Masers
- Chemical, Biological and Radiological Warfare
- Miscellaneous Detection and Detectors