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Träfflista för sökning "WFRF:(Grönlund Rasmus) ;spr:eng;conttype:(refereed);pers:(Lewander Märta)"

Sökning: WFRF:(Grönlund Rasmus) > Engelska > Refereegranskat > Lewander Märta

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1.
  • Guan, Zuguang, et al. (författare)
  • Gas analysis within remote porous targets using LIDAR multi-scatter techniques
  • 2008
  • Ingår i: Applied Physics B. - : Springer Science and Business Media LLC. - 0946-2171 .- 1432-0649. ; 93:2-3, s. 657-663
  • Tidskriftsartikel (refereegranskat)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.
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2.
  • Guan, Zuguang, et al. (författare)
  • LIDAR technique for Remote Gas Analysis in Solid Scattering Media
  • 2009
  • Ingår i: Asia Optical Fiber Communication & Optoelectronic Exposition & Conference, 2008. AOE 2008.. - 9781557528636
  • Konferensbidrag (refereegranskat)abstract
    • LIDAR techniques are used to measure gases in solid scattering media remotely, by analyzing the differential absorption observed in the multiple scattering light. The gas exchange (O-2/N-2) in polystyrene foam is monitored. (C)2008 Optical Society of America
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  • Resultat 1-2 av 2
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konferensbidrag (1)
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refereegranskat  (2)Ta bort avgränsningen
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Svanberg, Sune (2)
Lundberg, Hans (2)
Grönlund, Rasmus (2)
Guan, Zuguang (2)
Lewander, Märta (2)Ta bort avgränsningen
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Lunds universitet (2)
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Engelska (2)Ta bort avgränsningen
Forskningsämne (UKÄ/SCB)
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