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Sensors 2016, 16(1), 8; doi:10.3390/s16010008

Proximal Detection of Traces of Energetic Materials with an Eye-Safe UV Raman Prototype Developed for Civil Applications

1
ENEA, FSN-TECFIS-DIM, Via E. Fermi 45, Frascati (Rome) 00044, Italy
2
Fraunhofer Institute for Chemical Technology ICT, Joseph-von-Fraunhofer-Strasse 7, Pfinztal 76327, Germany
3
Italian Air Force, Comando Logistico, 1^Divisione, Centro Sperimentale Volo, Reparto Armamento, Via di Pratica di Mare 45, Pomezia (Rome) 00040, Italy
4
ENEA, FSN-FUSPHY-SAD, Via E. Fermi 45, Frascati (Rome) 00044, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 19 November 2015 / Revised: 11 December 2015 / Accepted: 16 December 2015 / Published: 22 December 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [6658 KB, uploaded 22 December 2015]   |  

Abstract

A new Raman-based apparatus for proximal detection of energetic materials on people, was developed and tested for the first time. All the optical and optoelectronics components of the apparatus, as well as their optical matching, were carefully chosen and designed to respect international eye-safety regulations. In this way, the apparatus is suitable for civil applications on people in public areas such as airports and metro or railway stations. The acquisition software performs the data analysis in real-time to provide a fast response to the operator. Moreover, it allows for deployment of the apparatus either as a stand alone device or as part of a more sophisticated warning system architecture made up of several sensors. Using polyamide as substrate, the apparatus was able to detect surface densities of ammonium nitrate (AN), 2-methyl-1,3,5-trinitrobenzene (TNT), 3-nitrooxy-2,2-bis(nitrooxymethyl)propyl] nitrate (PETN) and urea nitrate (UN) in the range of 100–1000 μg/cm2 at a distance of 6.4 m using each time a single laser pulse of 3 mJ/cm2. The limit of detection calculated for AN is 289 μg/cm2. AN and UN provided the highest percentages of true positives (>82% for surface densities of 100–400 μg/cm2 and fingerprints) followed by TNT and PETN (17%–70% for surface densities of 400–1000 μg/cm2 and fingerprints). View Full-Text
Keywords: explosives; Raman Spectroscopy; proximal detection; laser explosives; Raman Spectroscopy; proximal detection; laser
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chirico, R.; Almaviva, S.; Colao, F.; Fiorani, L.; Nuvoli, M.; Schweikert, W.; Schnürer, F.; Cassioli, L.; Grossi, S.; Murra, D.; Menicucci, I.; Angelini, F.; Palucci, A. Proximal Detection of Traces of Energetic Materials with an Eye-Safe UV Raman Prototype Developed for Civil Applications. Sensors 2016, 16, 8.

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