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dc.contributor.authorYang, J.
dc.contributor.authorPodesta, M.
dc.contributor.authorFredrickson, E.
dc.description.abstractOne aspect of the interaction between fast ions and magnetohydrodynamic (MHD) instabilities is the fast ion transport. Coupled kink and tearing MHD instabilities have also been reported to cause fast ion transport. Recently, the ''kick" model has been developed to compute the evolution of the fast ion distribution from the neutral beam injection using instabilities as phase space resonance sources. The goal of this paper is to utilize the kick model to understand the physics of fast ion transport caused by the coupled kink and tearing modes. Soft X-ray diagnostics are used to identify the mode parameters in NSTX. The comparison of neutron rates measured and computed from time-dependent TRANSP simulation with the kick model shows the coupling of kink and tearing mode is important in determination of the fast ion transport. The numerical scan of the mode parameters shows that the relative phase of the kink and tearing modes and the overlapping of kink and tearing mode resonances in the phase space can affect the fast ion transport, suggesting that the synergy of the coupled modes may be causing the fast ion transporen_US
dc.description.tableofcontentsreadme and digital data filesen_US
dc.publisherPrinceton Plasma Physics Laboratory, Princeton Universityen_US
dc.relationPlasma Physics and Controlled Fusionen_US
dc.subjectEnergetic Particlesen_US
dc.subjectTearing Modesen_US
dc.subjectTokamak Transporten_US
dc.subjectKick Modelen_US
dc.titleSynergy of Coupled Kink and Tearing Modes in Fast Ion Transporten_US
dc.contributor.funderU. S. Department of Energyen_US
Appears in Collections:NSTX-U

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