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Nonlinear dynamics and transport driven by energetic particle instabilities using a gyro-Landau closure model

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Física de Plasmases
dc.contributor.authorSpong, D. A.
dc.contributor.authorVan Zeeland, M. A.
dc.contributor.authorHeidbrink, W. W.
dc.contributor.authorDu, X.
dc.contributor.authorVarela, Jacobo
dc.contributor.authorGarcía Gonzalo, Luis
dc.contributor.authorGhai, Y.
dc.contributor.funderComunidad de Madrides
dc.contributor.funderUniversidad Carlos III de Madrides
dc.date.accessioned2022-04-27T07:33:10Z
dc.date.available2022-04-27T07:33:10Z
dc.date.issued2021-11
dc.description.abstractEnergetic particle (EP) destabilized Alfvén eigenmode (AE) instabilities are simulated for a DIII-D experimental case with a pulsed neutral beam using a gyro-Landau moments model which introduces EP phase-mixing effects through closure relations. This provides a computationally efficient reduced model which is applied here in the nonlinear regime over timescales that would be difficult to address with more complete models. The long timescale nonlinear evolution and related collective transport losses are examined including the effects of zonal flow/current generation, nonlinear energy cascades, and EP profile flattening. The model predicts frequencies and mode structures that are consistent with experimental observations. These calculations address issues that have not been considered in previous modelling: The EP critical gradient profile evolution in the presence of zonal flows/currents, and the dynamical nature of the saturated state. A strong level of intermittency is present in the predicted instability-driven transport; this is connected to the zonal flow growth and decay cycles and nonlinear energy transfers. Simulation of intermittent AE-enhanced EP transport will be an important issue for the protection of plasma facing components in the next generation of fusion devices.en
dc.description.sponsorshipThis material is based upon work supported by the US Department of Energy, Office of Science using the DIII-D National Fusion Facility, a DOE Office of Science user facility, under Awards DE-AC05-00OR22725, DE-FC02-04ER54698, and the US DOE SciDAC ISEP Center. Support is also acknowledged from project 2019-T1/AMB-13648 founded by the Comunidad de Madrid and Comunidad de Madrid (Spain)—multiannual agreement with UC3M Excelencia para el Profesorado Universitario EPUC3M14 Fifth regional research plan 2016-2020. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a US Department of Energy Office of Science User Facility located at Lawrence Berkeley National Laboratory, operated under Contract No. DE-AC02- 05CH11231. We would like to thank Matt Beidler of Oak Ridge National Laboratory for helpful suggestions on this manuscript.en
dc.format.extent15
dc.identifier.bibliographicCitationSpong, D., van Zeeland, M., Heidbrink, W., Du, X., Varela, J., Garcia, L., & Ghai, Y. (2021). Nonlinear dynamics and transport driven by energetic particle instabilities using a gyro-Landau closure model *. Nuclear Fusion, 61(11), 116061.en
dc.identifier.doihttps://doi.org/10.1088/1741-4326/ac2990
dc.identifier.issn0029-5515
dc.identifier.publicationfirstpage2
dc.identifier.publicationissue11
dc.identifier.publicationlastpage16
dc.identifier.publicationtitleNUCLEAR FUSIONen
dc.identifier.publicationvolume61
dc.identifier.urihttps://hdl.handle.net/10016/34630
dc.identifier.uxxiAR/0000030411
dc.language.isoeng
dc.publisherIOP Scienceen
dc.relation.projectIDComunidad de Madrid. 2019-T1/AMB-13648es
dc.relation.projectIDUniversidad Carlos III de Madrid. EPUC3M14es
dc.rights© 2021 IAEA, Vienna.en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaEnergía Nucleares
dc.subject.otherAlfvenen
dc.subject.otherEnergetic particleen
dc.subject.otherGyrofluiden
dc.subject.otherInstabilityen
dc.subject.otherNonlinearen
dc.subject.otherTokamaken
dc.subject.otherTransporten
dc.titleNonlinear dynamics and transport driven by energetic particle instabilities using a gyro-Landau closure modelen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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