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dc.contributor.authorSainct, Florent P.
dc.contributor.authorUrabe, Keiichiro
dc.contributor.authorPannier, Erwan
dc.contributor.authorLacoste, Deanna
dc.contributor.authorLaux, Christophe O.
dc.date.accessioned2020-03-10T06:58:53Z
dc.date.available2020-03-10T06:58:53Z
dc.date.issued2020-02-17
dc.date.submitted2019-10-10
dc.identifier.citationSainct, F. P., Urabe, K., Pannier, E., Lacoste, D. A., & Laux, C. O. (2020). Electron number density measurements in nanosecond repetitively pulsed discharges in water vapor at atmospheric pressure. Plasma Sources Science and Technology, 29(2), 025017. doi:10.1088/1361-6595/ab681b
dc.identifier.doi10.1088/1361-6595/ab681b
dc.identifier.urihttp://hdl.handle.net/10754/662089
dc.description.abstractThis article reports on experiments in a nonequilibrium plasma produced by nanosecond repetitively pulsed (NRP) spark discharges in water vapor at 450 K and atmospheric pressure. The objective is to determine the electron number density in the post-discharge, with spatial and temporal resolution, to gain a better understanding of the discharge development and chemical kinetics. Electron number densities were measured in water vapor from the broadenings and shifts of the Hα and Hβ lines of the hydrogen Balmer series and of the atomic oxygen triplet at 777 nm. For an average reduced electric field of about 150 Td, high electron densities up to 3 × 1018 cm-3 are measured at the cathode, up to 5 × 1017 cm-3 at the anode, and up to 4 × 1016 cm-3 in the interelectrode gap. The high density near the electrodes is attributed to ionization enhancement and secondary electron emission due to the high electric field in the plasma sheath. In the middle of the inter-electrode gap, we show that the electron density mainly decays by electron attachment reactions. The dissociation fraction of water vapor is estimated to be around 2% in the middle of the gap.
dc.description.sponsorshipThis research was supported by Agence Nationale de la Recherche PREPA project (ANR-09-BLAN-004) and Japan Society for the Promotion of Science (Grant No. 24246120). We thank Professor Odic for the gas chromatography experiments, and Drs. Demura, Rivière, Stehlé, Sahal-Bréchot and Professors Gigosos and Konjevic for useful discussions on the broadening and shift of hydrogen lines.
dc.publisherIOP Publishing
dc.relation.urlhttps://iopscience.iop.org/article/10.1088/1361-6595/ab681b
dc.rightsOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0
dc.titleElectron number density measurements in nanosecond repetitively pulsed discharges in water vapor at atmospheric pressure
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalPlasma Sources Science and Technology
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionLaboratoire EM2C, CNRS UPR288, CentraleSupélec, Université Paris-Saclay, 10 rue Joliot-Curie, F-91190, Gif-sur-Yvette, France
dc.contributor.institutionLaboratoire Diagnostics des Plasmas Hors Equilibre, Université de Toulouse, INU Champollion, Albi, France
dc.contributor.institutionDepartment of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, 277-8561 Chiba, Japan
dc.contributor.institutionDepartment of Aeronautics and Astronautics, Kyoto University, Kyoto 615-8540, Japan
kaust.personLacoste, Deanna
dc.date.accepted2020-01-06
refterms.dateFOA2020-03-10T07:12:32Z


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Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Except where otherwise noted, this item's license is described as Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.