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12 September 2021 Detection of trace mm- and sub-mm particles of organic substances using THz imaging with spectral resolution
A. E. Akmalov, G. E. Kotkovskii, K. I. Kozlovskii, E. M. Maksimov, I. L. Martynov, E. V. Osipov, A. A. Plekhanov, Yu. A. Kuzishchin, A. A. Chistyakov
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Proceedings Volume 11869, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies V; 1186907 (2021) https://doi.org/10.1117/12.2599920
Event: SPIE Security + Defence, 2021, Online Only
Abstract
The presence of peculiarities in terahertz spectra of many organic compounds allows the use of THz imaging and spectroscopy for the detection of various hazardous and explosive substances. This work is devoted to the study of the detection of trace amounts of 1,3,5-Trinitro-1,3,5-triazinane (RDX) in the form of particles localized in millimeter and submillimeter sizes using THz imaging with spectral resolution. As a result of the work, images of trace amounts of RDX in reflected THz radiation were obtained. The contrast in these images made it possible to detect single particles of the powdery substance. The difference in contrast for RDX and polyethylene (PE) in the obtained terahertz images makes it possible to use THz imaging with spectral resolution not only for detection, but also for the identification of chemical compounds.
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A. E. Akmalov, G. E. Kotkovskii, K. I. Kozlovskii, E. M. Maksimov, I. L. Martynov, E. V. Osipov, A. A. Plekhanov, Yu. A. Kuzishchin, and A. A. Chistyakov "Detection of trace mm- and sub-mm particles of organic substances using THz imaging with spectral resolution", Proc. SPIE 11869, Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies V, 1186907 (12 September 2021); https://doi.org/10.1117/12.2599920
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KEYWORDS
Terahertz radiation
Spectral resolution
Bandpass filters
Explosives
Imaging spectroscopy
Scattering
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