Oxygen concentration and temperature measurements in N2-O2 mixtures using rotational coherent anti-Stokes Raman spectroscopy
Martinsson, L. ; Bengtsson, P. E. LU
and Aldén, Marcus
LU
(1996)
In Applied Physics B
62(1).
p.29-37
- Abstract
The accuracy and precision of oxygen concentration and temperature measured by dual-broadband rotational Coherent Anti-Stokes Raman Spectroscopy (CARS) were investigated in nitrogen-oxygen mixtures at atmospheric pressure and temperatures between 290 and 1410 K. The relative standard deviation of temperatures evaluated from pure oxygen rotational CARS spectra was found to be around 5%, and the mean temperature was the same as for nitrogen CARS spectra, except for temperatures above 1000 K, where the temperature was 120 K below the correct value. The in situ calibrated oxygen concentrations were within 10% of the correct value, with a standard deviation of around 1.2% for the mixtures of 12 and 20% oxygen in nitrogen. For the lowest... (More)
The accuracy and precision of oxygen concentration and temperature measured by dual-broadband rotational Coherent Anti-Stokes Raman Spectroscopy (CARS) were investigated in nitrogen-oxygen mixtures at atmospheric pressure and temperatures between 290 and 1410 K. The relative standard deviation of temperatures evaluated from pure oxygen rotational CARS spectra was found to be around 5%, and the mean temperature was the same as for nitrogen CARS spectra, except for temperatures above 1000 K, where the temperature was 120 K below the correct value. The in situ calibrated oxygen concentrations were within 10% of the correct value, with a standard deviation of around 1.2% for the mixtures of 12 and 20% oxygen in nitrogen. For the lowest oxygen concentrations considered in this study (2 and 4%), the systematic errors in the evaluated concentrations were very large, and the standard deviation of repeated single-shot measurements was above 2%. However, employing weighting in the spectral fitting routine reduced the errors in the concentration and the single-shot standard deviation was lowered to 0.5%. Finally, it was shown that spectral interference (from oxygen) in a rotational CARS spectrum of nitrogen generally had little impact on the temperature evaluated from fitting the spectra to theoretical nitrogen spectra.
(Less)
- author
- Martinsson, L.
; Bengtsson, P. E.
LU
and Aldén, Marcus
LU
- organization
- publishing date
- 1996-01
- type
- Contribution to journal
- publication status
- published
- in
- Applied Physics B
- volume
- 62
- issue
- 1
- pages
- 9 pages
- publisher
- Springer
- external identifiers
-
- scopus:0029733146
- ISSN
- 0946-2171
- language
- English
- LU publication?
- yes
- id
- 1375fc82-1cd9-4c13-a7e4-bde669f671d5
- date added to LUP
- 2016-06-29 16:59:10
- date last changed
- 2022-03-01 02:28:12
@article{1375fc82-1cd9-4c13-a7e4-bde669f671d5,
abstract = {{<p>The accuracy and precision of oxygen concentration and temperature measured by dual-broadband rotational Coherent Anti-Stokes Raman Spectroscopy (CARS) were investigated in nitrogen-oxygen mixtures at atmospheric pressure and temperatures between 290 and 1410 K. The relative standard deviation of temperatures evaluated from pure oxygen rotational CARS spectra was found to be around 5%, and the mean temperature was the same as for nitrogen CARS spectra, except for temperatures above 1000 K, where the temperature was 120 K below the correct value. The in situ calibrated oxygen concentrations were within 10% of the correct value, with a standard deviation of around 1.2% for the mixtures of 12 and 20% oxygen in nitrogen. For the lowest oxygen concentrations considered in this study (2 and 4%), the systematic errors in the evaluated concentrations were very large, and the standard deviation of repeated single-shot measurements was above 2%. However, employing weighting in the spectral fitting routine reduced the errors in the concentration and the single-shot standard deviation was lowered to 0.5%. Finally, it was shown that spectral interference (from oxygen) in a rotational CARS spectrum of nitrogen generally had little impact on the temperature evaluated from fitting the spectra to theoretical nitrogen spectra.</p>}},
author = {{Martinsson, L. and Bengtsson, P. E. and Aldén, Marcus}},
issn = {{0946-2171}},
language = {{eng}},
number = {{1}},
pages = {{29--37}},
publisher = {{Springer}},
series = {{Applied Physics B}},
title = {{Oxygen concentration and temperature measurements in N<sub>2</sub>-O<sub>2</sub> mixtures using rotational coherent anti-Stokes Raman spectroscopy}},
volume = {{62}},
year = {{1996}},
}