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Modeling the thermalization of electrons in conditions relevant to atmospheric pressure He-O2 nanosecond pulsed discharges

2021Journal article Open access
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dc.contributor.authorBieniek, M. S.
dc.contributor.authorWalsh, J. L.
dc.contributor.authorHasan, M. I.
dc.date.accessioned2022-09-07T13:13:06Z
dc.date.available2022-09-07T13:13:06Z
dc.date.issued2021
dc.description.abstractThe electron thermalization process is significant in nanosecond pulsed discharges due to the applied voltage pulse’s short duration and rapid rise and fall times. In this contribution a comparison was made between two approaches to modeling the electron kinetics of electron thermalization in atmospheric pressure helium plasma with an oxygen admixture. Modeling based on the direct solution of the local time-dependent electron Boltzmann equation was compared with modeling based on the commonly used but less general local mean energy approximation. For modeling based on the local time-dependent electron Boltzmann equation, a temporary faster decay in the population of electrons in the high energy tail, and a slower decay in the population of intermediate energy electrons was observed while the electron swarm cooled from an average energy of above 8 eV, without an electric field present. During that period, the electron impact reaction rate coefficients of helium direct ionization and electronic excitation decreased by more than 3 orders of magnitude as compared to the modeling based on the local mean energy approximation. Global modeling of the evolution of plasma species densities in response to an electric field typical of atmospheric pressure pulsed discharges was performed with the two approaches to electron kinetics. Differences in the species densities were observed between the two approaches, with an 100% increase in the maximum density of electrons found with the modeling based on the local mean energy approximation.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBieniek, M. S., Walsh, J. L., & Hasan, M. I. (2021). Modeling the thermalization of electrons in conditions relevant to atmospheric pressure He-O 2 nanosecond pulsed discharges. Physics of Plasmas, 28(6), 063501.pt_PT
dc.identifier.doi10.1063/5.0048571pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/4580
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversionhttps://aip.scitation.org/doi/full/10.1063/5.0048571pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectElectron thermalizationpt_PT
dc.subjectModelingpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleModeling the thermalization of electrons in conditions relevant to atmospheric pressure He-O2 nanosecond pulsed dischargespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue6pt_PT
oaire.citation.startPage063501pt_PT
oaire.citation.titlePhysics of Plasmaspt_PT
oaire.citation.volume28pt_PT
person.familyNameBieniek
person.givenNameMatthew
person.identifier.orcid0000-0001-5847-2228
person.identifier.scopus-author-id57159390400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6993183c-1ad1-4431-a551-320fb2ab2fde
relation.isAuthorOfPublication.latestForDiscovery6993183c-1ad1-4431-a551-320fb2ab2fde

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