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dc.contributor.authorIshizawa, A.
dc.contributor.authorImadera, K.
dc.contributor.authorNakamura, Y.
dc.contributor.authorKishimoto, Y.
dc.contributor.alternative石澤, 明宏
dc.date.accessioned2019-08-19T04:25:44Z-
dc.date.available2019-08-19T04:25:44Z-
dc.date.issued2019-08
dc.identifier.issn1070-664X
dc.identifier.urihttp://hdl.handle.net/2433/243340-
dc.description.abstractNonlinear evolution of the kinetic ballooning mode (KBM) is investigated by extending the global toroidal gyrokinetic simulation code (GKNET) to an electromagnetic regime. It is found that the saturation process of KBM, which is unstable at high normalized pressure β, is significantly different from the ion temperature gradient (ITG) mode, which is unstable at low β. The KBMs get saturated by producing zonal flows and zonal magnetic fields. The production of zonal flow is weak in the initial saturation phase of KBM, which is in contrast to the ITG mode which produces strong zonal flows in the initial saturation phase. However, strong zonal flows are produced in the subsequent evolution of KBM, and a quasisteady state of KBM turbulence is established. In addition to the zonal flows, some low toroidal number modes, which are linearly stable against the KBM, dominate the KBM turbulence. The strong zonal magnetic field is also produced by the KBM. These zonal modes regulate the KBM turbulence.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAIP Publishing
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in (citation of published article) and may be found at https://doi.org/10.1063/1.5100308.
dc.rightsThe full-text file will be made open to the public on 6 August 2020 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
dc.titleGlobal gyrokinetic simulation of turbulence driven by kinetic ballooning mode
dc.type.niitypeJournal Article
dc.identifier.jtitlePhysics of Plasmas
dc.identifier.volume26
dc.identifier.issue8
dc.relation.doi10.1063/1.5100308
dc.textversionpublisher
dc.identifier.artnum082301
dc.addressGraduate School of Energy Science, Kyoto University
dc.addressGraduate School of Energy Science, Kyoto University
dc.addressGraduate School of Energy Science, Kyoto University
dc.addressGraduate School of Energy Science, Kyoto University
dc.identifier.kaken17K06991
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