Picosecond-lidar thermometry in a measurement volume surrounded by highly scattering media

Research output: Contribution to journalArticle

Abstract

In this work, a picosecond-lidar system, using a Nd:YAG picosecond laser, a Newtonian telescope and a streak camera, was used for single-ended furnace diagnostics. The optical access of the furnace was obstructed by a sooty diffusion ethylene flame. It was demonstrated that, with proper optical arrangement, the elastic scattering of the flame can be mapped in one dimension simultaneously as temperatures, up to 1200 K, are measured in the furnace using Rayleigh thermometry. Accumulated point temperature measurements as well as one-and two-dimensional measurements were conducted. A discussion about noise influence on accuracy and precision shows that measurements allowing a resolution of similar to 6 cm are possible with a single-pixel temperature standard deviation of 91 K, while mapping soot scattering from the flame within the dynamic range of the streak camera, using 30 mJ pulse energy.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics

Keywords

  • laser diagnostics, lidar, Rayleigh scattering, thermometry, soot mapping
Original languageEnglish
Article number125302
JournalMeasurement Science & Technology
Volume22
Issue number12
Publication statusPublished - 2011
Publication categoryResearch
Peer-reviewedYes