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      https://www.ias.ac.in/article/fulltext/pram/092/02/0020

    • Keywords

       

      Stand-off detection; improvised explosive materials; time-gated UV–Raman spectroscopy

    • Abstract

       

      A transportable, trolley-mounted stand-off explosive material detection system based on the time-gated Raman spectroscopy was developed and tested in our laboratory. This system is capable of identifying the explosives and improvised explosive materials located up to a distance of 30 m. A frequency tripled Nd:YAG, nanosecond pulsed laser (355 nm, 6 ns) operated at 10 Hz was used as an excitation source to induce Raman spectra of explosive materials under investigation. A reflected type 200 mm aperture telescope designed using Zemax opticaldesign software was used to collect the backscattered Raman signals. Raman signals were recorded using the gated intensified charge coupled device (ICCD) spectrograph. A LabVIEW-based data acquisition and analysis software for real-time identification of materials was developed and used. It gives audio as well as text alarm to the operatorabout threat identification.

    • Author Affiliations

       

      KAMAL KUMAR GULATI1 SANJAY GULIA1 NITESH KUMAR1 ANIL KUMAR1 SWARAN KUMARI1 VIJAYETA GAMBHIR1 M N REDDY1

      1. Laser Science and Technology Centre (LASTEC), DRDO, Delhi 110 054, India
    • Dates

       
  • Pramana – Journal of Physics | News

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