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Effect of electromagnetic wave reflection from conducting surfaces on blob dynamics in the tokamak scrape-off layer

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dc.contributor.authorStepanenko, A. A.
dc.contributor.authorСтепаненко, Александр Александрович
dc.date.accessioned2024-12-28T10:07:08Z
dc.date.available2024-12-28T10:07:08Z
dc.date.issued2023
dc.description.abstractElectromagnetic dynamics of blobs in hot scrape-off-layer plasmas of the tokamak are affected by excitation of the Alfvén waves and their subsequent propagation to the machine first wall along open magnetic field lines. In this study, the interaction of electromagnetic perturbations with the conducting tokamak wall and the resulting impact of these perturbations on the motion of filaments at the tokamak edge are analyzed. The model describing blob dynamics is presented. To describe the reflection of the Alfvén waves from the tokamak wall, the new form of sheath boundary conditions for the parallel current and electrostatic potential at the plasma–sheath interface is proposed. It is demonstrated that depending on the wall resistivity, the waves can be either absorbed or reflected by the wall, influencing the excitation of electromagnetic fluctuations inside the filament plasma. The theoretical conclusions of the study are supported with the BOUT++ numerical modeling of blob dynamics at the edge of the DIII-D and NSTX tokamaks. It is shown that taking the reflective boundary conditions into account leads to the excitation of the standing Alfvén waves in the filament, periodically canceling the electrostatic currents inside the blob.
dc.identifier.citationStepanenko, A. A. Effect of electromagnetic wave reflection from conducting surfaces on blob dynamics in the tokamak scrape-off layer / Stepanenko, A.A. // Physics of Plasmas. - 2023. - 30. - № 4. - 10.1063/5.0140097
dc.identifier.doi10.1063/5.0140097
dc.identifier.urihttps://www.doi.org/10.1063/5.0140097
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85153058136&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000964366600014
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/30097
dc.relation.ispartofPhysics of Plasmas
dc.subjectReflection (computer programming)
dc.subjectplasma-facing components
dc.titleEffect of electromagnetic wave reflection from conducting surfaces on blob dynamics in the tokamak scrape-off layer
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue4
oaire.citation.volume30
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relation.isAuthorOfPublication.latestForDiscovery996bdcce-fc04-499e-bcc9-5f4c237fc455
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