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Proceedings Paper

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer
Author(s): Alexander A. Chistyakov; Gennadii E. Kotkovskii; Ivan P. Odulo; Alexey V. Sychev; Artem S. Bogdanov; Anatoly N. Perederiy; Evgeny M. Spitsyn; Alexander V. Shestakov
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Paper Abstract

A method for detecting ultralow quantities of explosives in air with use a state-of-the-art picosecond chip Nd3+:YAG laser has been developed. The method combines field asymmetric ion mobility spectrometry (FAIMS) with laser ionization of examined air samples. Radiation of λ = 266nm, τpulse = 300ps, Epulse = 30–150μJ, ν = 20–300Hz was used. Processes in the ion source for the use both picosecond and nanosecond ionization modes were analyzed. Parameters of the laser ion source have been specially optimized. The dependences on frequency, pulse energy, peak intensity, and average power for trinitrotoluene (TNT) and cyclotrimethylenetrinitramine (RDX) were obtained. It was shown that the optimal peak intensity should be no less 3·106 W/cm2. The detected ion signals for all explosives were shown to be threefold higher for picosecond excitation in comparison with use a nanosecond laser of the same average power. The estimated detection threshold of the prototype equals 1. 10-15 g/cm3. The results are promising for the development of a highly sensitive, portable laser explosive detector.

Paper Details

Date Published: 14 May 2015
PDF: 9 pages
Proc. SPIE 9454, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XX, 94540S (14 May 2015); doi: 10.1117/12.2085299
Show Author Affiliations
Alexander A. Chistyakov, National Research Nuclear Univ. MEPhI (Russian Federation)
Gennadii E. Kotkovskii, National Research Nuclear Univ. MEPhI (Russian Federation)
Ivan P. Odulo, National Research Nuclear Univ. MEPhI (Russian Federation)
Alexey V. Sychev, Moscow State Technical Univ. MIREA (Russian Federation)
Artem S. Bogdanov, Moscow State Technical Univ. MIREA (Russian Federation)
Anatoly N. Perederiy, Moscow State Technical Univ. MIREA (Russian Federation)
Evgeny M. Spitsyn, POLYUS Research and Development Institute (Russian Federation)
Alexander V. Shestakov, POLYUS Research and Development Institute (Russian Federation)


Published in SPIE Proceedings Vol. 9454:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XX
Steven S. Bishop; Jason C. Isaacs, Editor(s)

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