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Proceedings Paper

Photoacoustic spectroscopy (PAS) system for remote detection of explosives, chemicals, and special nuclear materials
Author(s): Hual-Te Chien; Ke Wang; Shuh-Haw Sheen; A. C. Paul Raptis
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Paper Abstract

This paper describes a practical photoacoustic spectroscopy technique applied to remote sensing of chemicals in an open environment. A laboratory system that consists of a high-power CO2 laser and an open-field acoustic resonator is described. The acoustic resonator is a combination of a parabolic reflector and a narrow-band cylindrical acoustic resonator that resonates at the laser modulation frequency. The performance of the resonator is theoretically analyzed and experimentally verified. Significant improvement in signal-to-noise ratio has been achieved. Detection of gas-phase photoacoustic signals was demonstrated at a remote distance of several meters from the target. Potential applications to the detection of condensed-phase chemicals are discussed; the detection of the photoacoustic spectrum of trinitrotoluene (TNT) in an open environment is presented.

Paper Details

Date Published: 9 May 2012
PDF: 9 pages
Proc. SPIE 8358, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII, 83581K (9 May 2012); doi: 10.1117/12.919351
Show Author Affiliations
Hual-Te Chien, Argonne National Lab. (United States)
Ke Wang, Argonne National Lab. (United States)
Shuh-Haw Sheen, Argonne National Lab. (United States)
A. C. Paul Raptis, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 8358:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIII
Augustus Way Fountain, Editor(s)

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