Explosives and warfare agents remote Raman detection on realistic background samples
DLR (German Aerospace Center), Institute of Technical Physics, Im Langen Grund, 74239, Hardthausen, Germany
Accepted: 18 January 2022
Published online: 7 February 2022
Ultraviolet Raman spectroscopy measurements have been taken to detect non-uniform and self-prepared samples of both explosives and warfare agent simulants on realistic backgrounds. The main goal was to quantify the minimum requirements for an unambiguous identification in remote detection (distance 50 cm) with a commercial Czerny-Turner spectrometer coupled with a ICCD camera. Different backgrounds in the categories of metals, natural, construction materials, transparent and plastics were used to simulate realistic encounters in a possible warzone scenario. The distribution of the chemicals was random in order to simulate a realistic measurement, and the exact detected amount was determined during the post-processing. Measurements show the capability of the developed Raman system to detect amount always in the range of μg range. Further data analysis will demonstrate the extension of the detection up to ng range for few cases. An analysis of the incident laser beam angle, size (diameter) and energy dependency is also discussed to demonstrate the technological limits outside the optimal detecting conditions.
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