Standoff detection of explosive materials using time-gated UV-Raman spectroscopy

Bo Wang; Pu Zhang; Shuyao Zhang; Xiangping Zhu; Wei Zhao

doi:10.1117/12.2606981

24 November 2021 Standoff detection of explosive materials using time-gated UV-Raman spectroscopy

Bo Wang, Pu Zhang, Shuyao Zhang, Xiangping Zhu, Wei Zhao

Proceedings Volume 12064, AOPC 2021: Optical Spectroscopy and Imaging; 120640Q (2021) https://doi.org/10.1117/12.2606981
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Improvised explosive devices (IED) and homemade explosives (HMEs) have become the preferred choice for terrorists and insurgents. It’s a challenge to develop the techniques to detect explosive hazards at standoff distances. In this paper, a standoff UV Raman spectrum detection system for explosive detection was developed, which can realize 2-10m Raman spectrum detection of solid, solution and trace potassium nitrate samples. The relationship between Raman signal intensity (RSI) and pulse energy, detection distance and sample concentration was studied. The experimental results show that the RSI is approximately proportional to the pluse energy and contains nonlinear terms. It has an inverse square relationship with the detection distance and a linear relationship with the sample concentration. The concentration of solution and trace potassium nitrate samples of were successfully predicted at 2m distance, and the root mean square error of prediction (RMSEP) was 11.7 and 6.1, respectively.A simple and effective method for preparing trace potassium nitrate is presented.

Citation Download Citation

Bo Wang, Pu Zhang, Shuyao Zhang, Xiangping Zhu, and Wei Zhao "Standoff detection of explosive materials using time-gated UV-Raman spectroscopy", Proc. SPIE 12064, AOPC 2021: Optical Spectroscopy and Imaging, 120640Q (24 November 2021); https://doi.org/10.1117/12.2606981

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KEYWORDS

Raman spectroscopy

Potassium

Standoff detection

Explosives

Explosives detection

Spectroscopy

Laser energy

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