Time-resolved absolute OH density measurements in a millisecond-pulsed DC glow discharge from carbon dioxide with water admixture by laser-induced fluorescence (LIF) spectroscopy are presented. For that purpose, a novel technique is suggested to calibrate the OH LIF setup by means of two-photon absorption LIF spectroscopy measurements on a CO-filled gas cell. OH densities in the order of 1018 m−3 are reported at a pressure of 6.67mbar with a water admixture of 20% and a discharge current of 50mA. Furthermore, the time evolution of the CO2 conversion is determined from collision energy transfer LIF and validated against literature. The time-dependent rotational temperature of OH is obtained with LIF thermometry.
Absolute OH density measurements in a CO2-H2O glow discharge by laser-induced fluorescence spectroscopy / Budde, Maik; Martini, Luca Matteo; Ceppelli, Matteo; Quercetti, Sara; Engeln, Richard. - In: PLASMA SOURCES SCIENCE & TECHNOLOGY. - ISSN 0963-0252. - ELETTRONICO. - 2022:(2022). [10.1088/1361-6595/ac5ecc]
Absolute OH density measurements in a CO2-H2O glow discharge by laser-induced fluorescence spectroscopy
Martini, Luca Matteo;Ceppelli, Matteo;Quercetti, Sara;
2022-01-01
Abstract
Time-resolved absolute OH density measurements in a millisecond-pulsed DC glow discharge from carbon dioxide with water admixture by laser-induced fluorescence (LIF) spectroscopy are presented. For that purpose, a novel technique is suggested to calibrate the OH LIF setup by means of two-photon absorption LIF spectroscopy measurements on a CO-filled gas cell. OH densities in the order of 1018 m−3 are reported at a pressure of 6.67mbar with a water admixture of 20% and a discharge current of 50mA. Furthermore, the time evolution of the CO2 conversion is determined from collision energy transfer LIF and validated against literature. The time-dependent rotational temperature of OH is obtained with LIF thermometry.| File | Dimensione | Formato | |
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