Temperature retrieval error in Rayleigh-Brillouin scattering using Tenti’s S6 kinetic model

Lei Wu, Jason M. Reese, Yonghao Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

5 Citations (Scopus)
126 Downloads (Pure)

Abstract

The Rayleigh-Brillouin spectrum of light scattered by gas density fluctuations contains information about the gas temperature. This information can be retrieved by comparing experimentally measured spectra with theoretical line shapes determined from the linearized Boltzmann equation. However, the linearized Boltzmann equation is difficult to solve so Tenti's S6 kinetic model has been widely used for several decades because of its simplicity. In this paper, the linearized Boltzmann equation is solved by the efficient fast spectral method, and the temperature retrieval error associated with the Tenti's S6 model is systematically investigated for both spontaneous and coherent Rayleigh-Brillouin scattering, for different gas rarefaction and intermolecular potentials. Our results indicate useful calibrations for laser technologies that use Rayleigh-Brillouin scattering to profile for gas temperatures with high accuracy.
Original languageEnglish
Title of host publication30th International Symposium on Rarefied Gas Dynamics
EditorsAndrew Ketsdever, Henning Struchtrup
Number of pages7
Volume1786
DOIs
Publication statusPublished - 15 Nov 2016
Event30th International Symposium on Rarefied Gas Dynamics - University of Victoria, Victoria BC, Canada
Duration: 10 Jul 201615 Jul 2016
https://conferences.uvic.ca/index.php/rgd/RGD30

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference30th International Symposium on Rarefied Gas Dynamics
CountryCanada
CityVictoria BC
Period10/07/1615/07/16
Internet address

Keywords

  • Rayleigh-Brillouin spectrum
  • light scattering
  • gas density fluctuations
  • gas temperature
  • Boltzmann equations
  • Tenti’s S6 kinetic model
  • gas rarefaction
  • visible spectra
  • atomic line shapes
  • calibration

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