Laser induced fluorescence in nanosecond repetitively pulsed discharges for CO2 conversion

L. M. Martini, N. Gatti, G. Dilecce, M. Scotoni, P. Tosi

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A CO2 nanosecond repetitively pulsed discharge (NRP) is a harsh environment for laser induced fluorescence (LIF) diagnostics. The difficulties arise from it being a strongly collisional system in which the gas composition, pressure and temperature, have quick and strong variations. The relevant diagnostic problems are described and illustrated through the application of LIF to the measurement of the OH radical in three different discharge configurations, with gas mixtures containing CO2 + H2O. These range from a dielectric barrier NRP with He buffer gas, a less hostile case in which absolute OH density measurement is possible, to an NRP in CO2+H2O, where the full set of drawbacks is at work. In the last case, the OH density measurement is not possible with laser pulses and detector time resolution in the ns time scale. Nevertheless, it is shown that with a proper knowledge of the collisional rate constants involved in the LIF process, a collisional energy transfer-LIF methodology is still applicable to deduce the gas composition from the analysis of LIF spectra.

Originele taal-2Engels
Artikelnummer014016
Aantal pagina's8
TijdschriftPlasma Physics and Controlled Fusion
Volume60
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 1 jan 2018
Extern gepubliceerdJa
Evenement44th European Physical Society Conference on Plasma Physics, EPS 2017 - Belfast, Verenigd Koninkrijk
Duur: 26 jun 201730 jun 2017

Vingerafdruk

laser induced fluorescence
Fluorescence
Lasers
gas composition
Gases
Chemical analysis
Gas mixtures
Discharge (fluid mechanics)
Energy transfer
gas mixtures
Laser pulses
Rate constants
buffers
energy transfer
methodology
Detectors
detectors
configurations
pulses
gases

Bibliografische nota

Special issue featuring the invited talks from the 44th EPS conference on plasma physics, Belfast, 26-30 june 2017

Citeer dit

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abstract = "A CO2 nanosecond repetitively pulsed discharge (NRP) is a harsh environment for laser induced fluorescence (LIF) diagnostics. The difficulties arise from it being a strongly collisional system in which the gas composition, pressure and temperature, have quick and strong variations. The relevant diagnostic problems are described and illustrated through the application of LIF to the measurement of the OH radical in three different discharge configurations, with gas mixtures containing CO2 + H2O. These range from a dielectric barrier NRP with He buffer gas, a less hostile case in which absolute OH density measurement is possible, to an NRP in CO2+H2O, where the full set of drawbacks is at work. In the last case, the OH density measurement is not possible with laser pulses and detector time resolution in the ns time scale. Nevertheless, it is shown that with a proper knowledge of the collisional rate constants involved in the LIF process, a collisional energy transfer-LIF methodology is still applicable to deduce the gas composition from the analysis of LIF spectra.",
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Laser induced fluorescence in nanosecond repetitively pulsed discharges for CO2 conversion. / Martini, L. M.; Gatti, N.; Dilecce, G.; Scotoni, M.; Tosi, P.

In: Plasma Physics and Controlled Fusion, Vol. 60, Nr. 1, 014016, 01.01.2018.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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AU - Scotoni, M.

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