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

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Author

Summary, in English

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.

Department/s

Publishing year

2011

Language

English

Publication/Series

Measurement Science & Technology

Volume

22

Issue

12

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • laser diagnostics
  • lidar
  • Rayleigh scattering
  • thermometry
  • soot mapping

Status

Published

ISBN/ISSN/Other

  • ISSN: 0957-0233