Share Email Print
cover

Proceedings Paper

Bioaerosol standoff detection and correlation assessment with concentration and viability point sensors
Author(s): Sylvie Buteau; Jean-Robert Simard; Susan Rowsell; Gilles Roy
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A standoff bioaerosol sensor based on intensified range-gated spectrometric detection of Laser Induced Fluorescence was used to spectrally characterize bioaerosol simulants during in-chamber and open-air releases at Suffield, Canada, in August 2008 from a standoff position. In total, 42 in-chamber Bacillus atrophaeus (formerly Bacillus subtilis var globigii; BG) cloud and 27 open-air releases of either BG, Pantoea agglomerans (formerly Erwinia herbicola; EH), MS2 and ovalbumin (OV) were generated. The clouds were refereed by different point sensors including Aerodynamic Particle Sizer (APS) and slit or impingers samplers. The APS monitored the particle size distribution and concentration and the samplers characterized the viable portion of the cloud. The extracted spectral signatures show robustness to different degree. The correlation assessment showed good results in most cases where the LIF signal to noise ratio was significant. The sensor 4σ sensitivity was evaluated to 1 300, 600, 100 and 30 ppl for BG, OV, MS2 and EH respectively. Correlation results are presented by plotting the SINBAHD metric versus the corresponding particle concentration, in which case, the obtained slope is proportional to the material fluorescence cross-section. The different acquired signal is hence compared in terms of their fluorescence cross-section additionally to their spectral characteristics.

Paper Details

Date Published: 12 October 2010
PDF: 12 pages
Proc. SPIE 7838, Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII, 78380J (12 October 2010); doi: 10.1117/12.864685
Show Author Affiliations
Sylvie Buteau, Defence Research and Development Canada (Canada)
Jean-Robert Simard, Defence Research and Development Canada (Canada)
Susan Rowsell, Defence Research and Development Canada (Canada)
Gilles Roy, Defence Research and Development Canada (Canada)


Published in SPIE Proceedings Vol. 7838:
Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII
Colin Lewis; Roberto Zamboni; François Kajzar; Doug Burgess; Emily M. Heckman, Editor(s)

© SPIE. Terms of Use
Back to Top