Publication:
Analysis of the ECH effect on EPM/AE stability in Heliotron J plasma using a Landau closure model

dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Física de Plasmases
dc.contributor.authorVarela Rodríguez, Jacobo
dc.contributor.authorNagasaki, K.
dc.contributor.authorKobayashi, S.
dc.contributor.authorNagaoka, K.
dc.contributor.authorAdulsiriswad, P.
dc.contributor.authorCappa, A.
dc.contributor.authorYamamoto, S.
dc.contributor.authorWatanabe, K. Y.
dc.contributor.authorSpong, D. A.
dc.contributor.authorGarcía Gonzalo, Luis
dc.contributor.authorGhai, Y.
dc.contributor.authorOrtiz Luengo, Juan
dc.contributor.funderComunidad de Madrides
dc.date.accessioned2023-05-29T09:41:34Z
dc.date.available2023-05-29T09:41:34Z
dc.date.issued2023-02
dc.description.abstractThe aim of the present study is to analyze the effect of the electron cyclotron heating (ECH) on the linear stability of Alfvén eigenmodes (AEs) and energetic particle modes (EPMs) triggered by energetic ions in Heliotron J plasma. The analysis is performed using the FAR3d code that solves a reduced MHD model to describe the thermal plasma coupled with a gyrofluid model for the energetic particle (EP) species. The simulations reproduce the AE/EPM stability trends observed in the experiments as the electron temperature (Te) increases, modifying the thermal plasma β, EP β and EP slowing-down time. Particularly, the $n/m = 1/2$ EPM and $2/4$ Global AE are stabilized in the low-bumpiness (LB) configuration due to an enhancement of the continuum, finite Larmor radius and e-i Landau damping effects as the thermal β increases. On the other hand, a larger ECH injection power cannot stabilize the AE/EPM in medium-bumpiness and high-bumpiness (HB) configurations because the damping effects are weaker compared to the LB case, unable to balance the further destabilization induced by an enhanced EP resonance as the EP slowing-down time and EP β increases with Te.en
dc.description.sponsorshipThe authors would like to thank the Heliotron J technical staff for their contributions in the operation and maintenance of Heliotron J. This work was supported by the Comunidad de Madrid under the Project 2019-T1/AMB-13648, Comunidad de Madrid-multiannual agreement with UC3M ('Excelencia para el Profesorado Universitario'-EPUC3M14 )-Fifth regional research plan 2016-2020 as well as NIFS Collaborative Research Program NIFS08KAOR010, NFIS10KUHL030, NIFS07KLPH004 and 'PLADyS' JSPS Core-to-Core Program, A. Advanced Research Networks.en
dc.format.extent14
dc.identifier.bibliographicCitationSpong, D. A., Nagasaki, K., Kobayashi, S., Nagaoka, K., Adulsiriswad, P., Cappa, A., Yamamoto, S., Watanabe, K., Spong, D. A., Garcia, L. A., Ghai, Y., & Ortiz, J. (2022). Analysis of the ECH effect on EPM/AE stability in Heliotron J plasma using a Landau closure model. Nuclear Fusion, 63(2), 026009.en
dc.identifier.doihttps://doi.org/10.1088/1741-4326/aca98e
dc.identifier.issn0029-5515
dc.identifier.publicationfirstpage1
dc.identifier.publicationissue2, 026009
dc.identifier.publicationlastpage14
dc.identifier.publicationtitleNuclear Fusionen
dc.identifier.publicationvolume63
dc.identifier.urihttps://hdl.handle.net/10016/37377
dc.identifier.uxxiAR/0000033062
dc.language.isoeng
dc.publisherIOP Scienceen
dc.relation.projectIDComunidad de Madrid. 2019-T1/AMB-13648es
dc.relation.projectIDComunidad de Madrid. EPUC3M14es
dc.rights© 2022 The Author(s).en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaEnergía Nuclearen
dc.subject.ecienciaFísicaes
dc.subject.ecienciaFusiónes
dc.subject.otherAEen
dc.subject.otherECHen
dc.subject.otherEnergetic particlesen
dc.subject.otherEPMen
dc.subject.otherHeliotron Jen
dc.subject.otherMHDen
dc.subject.otherStellaratoren
dc.titleAnalysis of the ECH effect on EPM/AE stability in Heliotron J plasma using a Landau closure modelen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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