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Gas analysis within remote porous targets using LIDAR multi-scatter techniques

Guan, Zuguang LU ; Lewander, Märta LU ; Grönlund, Rasmus LU ; Lundberg, Hans LU and Svanberg, Sune LU (2008) In Applied Physics B 93(2-3). p.657-663
Abstract
Light detection and ranging (LIDAR) experiments are normally pursued for range resolved atmospheric gas measurements or for analysis of solid target surfaces using fluorescence of laser-induced breakdown spectroscopy. In contrast, we now demonstrate the monitoring of free gas enclosed in pores of materials, subject to impinging laser radiation, employing the photons emerging back to the surface laterally of the injection point after penetrating the medium in heavy multiple scattering processes. The directly reflected light is blocked by a beam stop. The technique presented is a remote version of the newly introduced gas in scattering media absorption spectroscopy (GASMAS) technique, which so far was pursued with the injection optics and... (More)
Light detection and ranging (LIDAR) experiments are normally pursued for range resolved atmospheric gas measurements or for analysis of solid target surfaces using fluorescence of laser-induced breakdown spectroscopy. In contrast, we now demonstrate the monitoring of free gas enclosed in pores of materials, subject to impinging laser radiation, employing the photons emerging back to the surface laterally of the injection point after penetrating the medium in heavy multiple scattering processes. The directly reflected light is blocked by a beam stop. The technique presented is a remote version of the newly introduced gas in scattering media absorption spectroscopy (GASMAS) technique, which so far was pursued with the injection optics and the detector in close contact with the sample. Feasibility measurements of LIDAR-GASMAS on oxygen in polystyrene foam were performed at a distance of 6 m. Multiple-scattering induced delays of the order of 50 ns, which corresponds to 15 m optical path length, were observed. First extensions to a range of 60 m are discussed. Remote observation of gas composition anomalies in snow using differential absorption LIDAR (DIAL) may find application in avalanche victim localization or for leak detection in snow-covered natural gas pipelines. Further, the techniques may be even more useful for short-range, non-intrusive GASMAS measurements, e.g., on packed food products. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Df, 07, Wt, 42, 68
in
Applied Physics B
volume
93
issue
2-3
pages
657 - 663
publisher
Springer
external identifiers
  • wos:000260613600049
  • scopus:55349099830
ISSN
0946-2171
DOI
10.1007/s00340-008-3171-7
language
English
LU publication?
yes
id
906e8a31-b258-4c31-91c8-04613700ae84 (old id 1283695)
date added to LUP
2009-02-10 10:29:16
date last changed
2017-01-01 04:38:11
@article{906e8a31-b258-4c31-91c8-04613700ae84,
  abstract     = {Light detection and ranging (LIDAR) experiments are normally pursued for range resolved atmospheric gas measurements or for analysis of solid target surfaces using fluorescence of laser-induced breakdown spectroscopy. In contrast, we now demonstrate the monitoring of free gas enclosed in pores of materials, subject to impinging laser radiation, employing the photons emerging back to the surface laterally of the injection point after penetrating the medium in heavy multiple scattering processes. The directly reflected light is blocked by a beam stop. The technique presented is a remote version of the newly introduced gas in scattering media absorption spectroscopy (GASMAS) technique, which so far was pursued with the injection optics and the detector in close contact with the sample. Feasibility measurements of LIDAR-GASMAS on oxygen in polystyrene foam were performed at a distance of 6 m. Multiple-scattering induced delays of the order of 50 ns, which corresponds to 15 m optical path length, were observed. First extensions to a range of 60 m are discussed. Remote observation of gas composition anomalies in snow using differential absorption LIDAR (DIAL) may find application in avalanche victim localization or for leak detection in snow-covered natural gas pipelines. Further, the techniques may be even more useful for short-range, non-intrusive GASMAS measurements, e.g., on packed food products.},
  author       = {Guan, Zuguang and Lewander, Märta and Grönlund, Rasmus and Lundberg, Hans and Svanberg, Sune},
  issn         = {0946-2171},
  keyword      = {Df,07,Wt,42,68},
  language     = {eng},
  number       = {2-3},
  pages        = {657--663},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Gas analysis within remote porous targets using LIDAR multi-scatter techniques},
  url          = {http://dx.doi.org/10.1007/s00340-008-3171-7},
  volume       = {93},
  year         = {2008},
}