Detection of explosives at a standoff distance using femtosecond LIBS technique
What is it about?
We report the standoff (up to ~2 m) and remote (~8.5 m) detection of novel high energy materials/explosive molecules (Nitroimidazoles and Nitropyrazoles) using the technique of femtosecond laser induced breakdown spectroscopy (LIBS). We utilized two different collection systems (a) ME-OCT-0007 (commercially available) and (b) Schmidt- Cassegrain telescope for these experiments. In conjunction with LIBS data, principal component analysis was employed to discriminate/classify the explosives and the obtained results in both configurations are compared. Different aspects influencing the LIBS signal strength at far distances such as fluence at target, efficiency of collection system etc. are discussed.
Why is it important?
Detection of explosives is a big challenge and more so doing at a standoff distance (few m) is even more challenging. Herein we have demonstrated the possibility of detecting explosives at a standoff distance of 3 m (and remote detection of 8.5 m) using femtosecond LIBS technique combined with some statistical analysis.
The following have contributed to this page: Professor Venugopal Rao Soma