24 October 2016 Laser desorption of explosives traces at ambient conditions
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Abstract
The requirement for a modern method of the detection of explosives is still important. One of the promising areas is laser remote detection of explosives. In this work we have developed a portable laser and quantitatively investigated its use for sampling of common explosives on different surfaces. It has been shown that most of desorbed products consist of molecules of explosives themselves, and the proportion of dissociated fragments is small.

It is shown that laser irradiation increases the amount of desorbed matter not only by increasing the number of pulses, but also due to an additional warming of a substrate. The use of frequency mode smoothens peculiar properties of the desorption process for all explosives and substrates used. The typical desorbed amount ranges from 95 ng to 7900 ng for 10-second irradiation of the samples used.

The developed laser can be applied in ion mobility spectrometry, IMS-based detectors of explosives to increase the distance of sampling. It has a mass of less than 2kg.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Artem E. Akmalov, Artem E. Akmalov, Alexander A. Chistyakov, Alexander A. Chistyakov, Olga I. Dubkova, Olga I. Dubkova, Gennadii E. Kotkovskii, Gennadii E. Kotkovskii, Evgenii M. Spitsyn, Evgenii M. Spitsyn, Nikolai M. Buzinov, Nikolai M. Buzinov, "Laser desorption of explosives traces at ambient conditions", Proc. SPIE 9995, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII, 99950G (24 October 2016); doi: 10.1117/12.2241813; https://doi.org/10.1117/12.2241813
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