Characterization of ammonia two-photon laser-induced fluorescence for gas-phase diagnostics
(2014) In Applied Physics B 115(1). p.25-33- Abstract
- Two-photon laser-induced fluorescence (LIF) of ammonia (NH3) with excitation of the C'-X transition at 304.8 nm and fluorescence detection in the 565 nm C'-A band has been investigated, targeting combustion diagnostics. The impact of laser irradiance, temperature, and pressure has been studied, and simulation of NH3-spectra, fitted to experimental data, facilitated interpretation of the results. The LIF-signal showed quadratic dependence on laser irradiance up to 2 GW/cm(2). Stimulated emission, resulting in loss of excited molecules, is induced above 10 GW/cm(2), i.e., above irradiances attainable for LIF imaging. Maximum LIF-signal was obtained for excitation at the 304.8 nm bandhead; however, lower temperature sensitivity over the range... (More)
- Two-photon laser-induced fluorescence (LIF) of ammonia (NH3) with excitation of the C'-X transition at 304.8 nm and fluorescence detection in the 565 nm C'-A band has been investigated, targeting combustion diagnostics. The impact of laser irradiance, temperature, and pressure has been studied, and simulation of NH3-spectra, fitted to experimental data, facilitated interpretation of the results. The LIF-signal showed quadratic dependence on laser irradiance up to 2 GW/cm(2). Stimulated emission, resulting in loss of excited molecules, is induced above 10 GW/cm(2), i.e., above irradiances attainable for LIF imaging. Maximum LIF-signal was obtained for excitation at the 304.8 nm bandhead; however, lower temperature sensitivity over the range 400-700 K can be obtained probing lines around 304.9 nm. A decrease in fluorescence signal was observed with pressure up to 5 bar absolute and attributed to collisional quenching. A detection limit of 800 ppm, at signal-to-noise ratio 1.5, was identified for single-shot LIF imaging over an area of centimeter scale, whereas for single-point measurements, the technique shows potential for sub-ppm detection. Moreover, high-quality NH3-imaging has been achieved in laminar and turbulent premixed flames. Altogether, two-photon fluorescence provides a useful tool for imaging NH3-detection in combustion diagnostics. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4410891
- author
- Brackmann, Christian LU ; Hole, Odd LU ; Zhou, Bo LU ; Li, Zhongshan LU and Aldén, Marcus LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics B
- volume
- 115
- issue
- 1
- pages
- 25 - 33
- publisher
- Springer
- external identifiers
-
- wos:000332853000003
- scopus:84899457106
- ISSN
- 0946-2171
- DOI
- 10.1007/s00340-013-5568-1
- language
- English
- LU publication?
- yes
- id
- 43778edd-afbd-4541-8ff0-422274c9fa09 (old id 4410891)
- date added to LUP
- 2016-04-01 10:04:50
- date last changed
- 2022-04-04 02:06:58
@article{43778edd-afbd-4541-8ff0-422274c9fa09,
abstract = {{Two-photon laser-induced fluorescence (LIF) of ammonia (NH3) with excitation of the C'-X transition at 304.8 nm and fluorescence detection in the 565 nm C'-A band has been investigated, targeting combustion diagnostics. The impact of laser irradiance, temperature, and pressure has been studied, and simulation of NH3-spectra, fitted to experimental data, facilitated interpretation of the results. The LIF-signal showed quadratic dependence on laser irradiance up to 2 GW/cm(2). Stimulated emission, resulting in loss of excited molecules, is induced above 10 GW/cm(2), i.e., above irradiances attainable for LIF imaging. Maximum LIF-signal was obtained for excitation at the 304.8 nm bandhead; however, lower temperature sensitivity over the range 400-700 K can be obtained probing lines around 304.9 nm. A decrease in fluorescence signal was observed with pressure up to 5 bar absolute and attributed to collisional quenching. A detection limit of 800 ppm, at signal-to-noise ratio 1.5, was identified for single-shot LIF imaging over an area of centimeter scale, whereas for single-point measurements, the technique shows potential for sub-ppm detection. Moreover, high-quality NH3-imaging has been achieved in laminar and turbulent premixed flames. Altogether, two-photon fluorescence provides a useful tool for imaging NH3-detection in combustion diagnostics.}},
author = {{Brackmann, Christian and Hole, Odd and Zhou, Bo and Li, Zhongshan and Aldén, Marcus}},
issn = {{0946-2171}},
language = {{eng}},
number = {{1}},
pages = {{25--33}},
publisher = {{Springer}},
series = {{Applied Physics B}},
title = {{Characterization of ammonia two-photon laser-induced fluorescence for gas-phase diagnostics}},
url = {{http://dx.doi.org/10.1007/s00340-013-5568-1}},
doi = {{10.1007/s00340-013-5568-1}},
volume = {{115}},
year = {{2014}},
}