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  • 标题:Standoff Detection of Explosives at 1 m using Laser Induced Breakdown Spectroscopy
  • 本地全文:下载
  • 作者:Manoj Kumar Gundawar ; Rajendhar Junjuri ; Ashwin Kumar Myakalwar
  • 期刊名称:Defence Science Journal
  • 印刷版ISSN:0976-464X
  • 出版年度:2017
  • 卷号:67
  • 期号:6
  • 页码:623-630
  • 语种:English
  • 出版社:Defence Scientific Information & Documentation Centre
  • 其他摘要:We report the ‘standoff detection’ of explosives at 1 m in laboratory conditions, for the first time in India, using Laser Induced Breakdown Spectroscopy combined with multivariate analysis. The spectra of a set of five secondary explosives were recorded at a distance of 1 m from the focusing as well as collection optics. The plasma characteristics viz., plasma temperature and electron density were estimated from Boltzmann statistics and Stark broadening respectively. Plasma temperature was estimated to be of the order of (10.9 ± 2.1) .103 K and electron density of (3.9 ± 0.5) .1016 cm-3. Using a ratiometric approach, C/H and H/O ratios showed a good correlation with the actual stoichiometric ratios and a partial identification success could be achieved. Finally employing principle component analysis, an excellent classification could be attained.
  • 关键词:Laser induced breakdown spectroscopy;Explosive detection;Principal component analysis;Multivariate analysis
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