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Ethane thermometry using rotational coherent anti-Stokes Raman scattering (CARS)

Hosseinnia, Ali LU ; Nordström, Emil LU ; Bood, Joakim LU and Bengtsson, Per Erik LU (2017) In Proceedings of the Combustion Institute2000-01-01+01:00 36(3). p.4461-4468
Abstract

The complete rotational CARS (coherent anti-Stokes Raman scattering) spectrum of ethane (C2H6) has for the first time been recorded instantaneously under high spectral resolution, and the potential for thermometry has been investigated. Experiments were performed in the temperature range 292-650K in pure ethane and in binary mixtures with nitrogen. A polarization technique was used to suppress the non-resonant contribution to the CARS signal. The ethane RCARS spectra show both S- and R-branch lines, which are more closely spaced than for the well-known nitrogen spectrum and located at much smaller Raman shifts. The peak signal strength was found to be around 240 times lower for ethane than for nitrogen (at 292K).... (More)

The complete rotational CARS (coherent anti-Stokes Raman scattering) spectrum of ethane (C2H6) has for the first time been recorded instantaneously under high spectral resolution, and the potential for thermometry has been investigated. Experiments were performed in the temperature range 292-650K in pure ethane and in binary mixtures with nitrogen. A polarization technique was used to suppress the non-resonant contribution to the CARS signal. The ethane RCARS spectra show both S- and R-branch lines, which are more closely spaced than for the well-known nitrogen spectrum and located at much smaller Raman shifts. The peak signal strength was found to be around 240 times lower for ethane than for nitrogen (at 292K). Two main approaches for ethane thermometry are evaluated, which both show high potential. The first is a method in which a spectrum with unknown temperature is fitted using a library of experimental spectra recorded at various temperatures. The second is a method based on ratios of integrated signals in different spectral regions. A theoretical model for simulation of theoretical spectra is under development.

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Ethane, Rotational CARS, Thermometry
in
Proceedings of the Combustion Institute2000-01-01+01:00
volume
36
issue
3
pages
4461 - 4468
publisher
Elsevier
external identifiers
  • scopus:85003561584
  • wos:000393412600127
ISSN
1540-7489
DOI
10.1016/j.proci.2016.06.011
language
English
LU publication?
yes
id
531bdf06-5af8-413e-b978-f9b8a8fde88e
date added to LUP
2017-02-17 12:44:08
date last changed
2018-01-07 11:50:50
@article{531bdf06-5af8-413e-b978-f9b8a8fde88e,
  abstract     = {<p>The complete rotational CARS (coherent anti-Stokes Raman scattering) spectrum of ethane (C<sub>2</sub>H<sub>6</sub>) has for the first time been recorded instantaneously under high spectral resolution, and the potential for thermometry has been investigated. Experiments were performed in the temperature range 292-650K in pure ethane and in binary mixtures with nitrogen. A polarization technique was used to suppress the non-resonant contribution to the CARS signal. The ethane RCARS spectra show both S- and R-branch lines, which are more closely spaced than for the well-known nitrogen spectrum and located at much smaller Raman shifts. The peak signal strength was found to be around 240 times lower for ethane than for nitrogen (at 292K). Two main approaches for ethane thermometry are evaluated, which both show high potential. The first is a method in which a spectrum with unknown temperature is fitted using a library of experimental spectra recorded at various temperatures. The second is a method based on ratios of integrated signals in different spectral regions. A theoretical model for simulation of theoretical spectra is under development.</p>},
  author       = {Hosseinnia, Ali and Nordström, Emil and Bood, Joakim and Bengtsson, Per Erik},
  issn         = {1540-7489},
  keyword      = {Ethane,Rotational CARS,Thermometry},
  language     = {eng},
  number       = {3},
  pages        = {4461--4468},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute2000-01-01+01:00},
  title        = {Ethane thermometry using rotational coherent anti-Stokes Raman scattering (CARS)},
  url          = {http://dx.doi.org/10.1016/j.proci.2016.06.011},
  volume       = {36},
  year         = {2017},
}