skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Stand-off detection of chemicals by UV Raman spectroscopy

Abstract

Experimental results are reported on a mobile, stand-alone, solar-blind ultraviolet (UV) Raman lidar system for the stand-off detection and identification of liquid and solid targets at ranges of hundreds of meters. The lidar is a coaxial system capable of performing range-resolved measurements of gases and aerosols, as well as solids and liquids. The transmitter is a flash lamp pumped 30 Hz Nd:YAG laser with quadrupled output at 266 nm. The receiver subsystem is comprised of a 40 cm Cassegrain telescope, a holographic UV edge filter for suppressing the elastic channel, a 0.46 m Czerny-Turner spectrometer, and a time gated intensified charge-coupled device (CCD) detector. The rejection of elastic light scattering by the edge filter is better than one part in 10{sup 5}, while the transmittance 500 cm-1 to the red of the laser line is greater than 50%. Raman data are shown for selected solids, neat liquids, and mixtures down to the level of 1% volume ratio. On the basis of the strength of the Raman returns, a stand-off detection limit of {approx}500 g/m2 for liquid spills of common solvents at the range of one half of a kilometer is possible. (c) 2000 Society for Applied Spectroscopy.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Department of Advanced Technology, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
20217411
Resource Type:
Journal Article
Journal Name:
Applied Spectroscopy
Additional Journal Information:
Journal Volume: 54; Journal Issue: 6; Other Information: PBD: Jun 2000; Journal ID: ISSN 0003-7028
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; RAMAN SPECTROSCOPY; ULTRAVIOLET SPECTROMETERS; AIR POLLUTION; SOILS; HAZARDOUS MATERIALS; CHEMICAL ANALYSIS; REMOTE SENSING; EXPERIMENTAL DATA

Citation Formats

Wu, Ming, Ray, Mark, Hang Fung, K., Ruckman, Mark W., Harder, David, and Sedlacek, Arthur J. III. Stand-off detection of chemicals by UV Raman spectroscopy. United States: N. p., 2000. Web. doi:10.1366/0003702001950418.
Wu, Ming, Ray, Mark, Hang Fung, K., Ruckman, Mark W., Harder, David, & Sedlacek, Arthur J. III. Stand-off detection of chemicals by UV Raman spectroscopy. United States. doi:10.1366/0003702001950418.
Wu, Ming, Ray, Mark, Hang Fung, K., Ruckman, Mark W., Harder, David, and Sedlacek, Arthur J. III. Thu . "Stand-off detection of chemicals by UV Raman spectroscopy". United States. doi:10.1366/0003702001950418.
@article{osti_20217411,
title = {Stand-off detection of chemicals by UV Raman spectroscopy},
author = {Wu, Ming and Ray, Mark and Hang Fung, K. and Ruckman, Mark W. and Harder, David and Sedlacek, Arthur J. III},
abstractNote = {Experimental results are reported on a mobile, stand-alone, solar-blind ultraviolet (UV) Raman lidar system for the stand-off detection and identification of liquid and solid targets at ranges of hundreds of meters. The lidar is a coaxial system capable of performing range-resolved measurements of gases and aerosols, as well as solids and liquids. The transmitter is a flash lamp pumped 30 Hz Nd:YAG laser with quadrupled output at 266 nm. The receiver subsystem is comprised of a 40 cm Cassegrain telescope, a holographic UV edge filter for suppressing the elastic channel, a 0.46 m Czerny-Turner spectrometer, and a time gated intensified charge-coupled device (CCD) detector. The rejection of elastic light scattering by the edge filter is better than one part in 10{sup 5}, while the transmittance 500 cm-1 to the red of the laser line is greater than 50%. Raman data are shown for selected solids, neat liquids, and mixtures down to the level of 1% volume ratio. On the basis of the strength of the Raman returns, a stand-off detection limit of {approx}500 g/m2 for liquid spills of common solvents at the range of one half of a kilometer is possible. (c) 2000 Society for Applied Spectroscopy.},
doi = {10.1366/0003702001950418},
journal = {Applied Spectroscopy},
issn = {0003-7028},
number = 6,
volume = 54,
place = {United States},
year = {2000},
month = {6}
}