Please use this identifier to cite or link to this item:
http://arks.princeton.edu/ark:/88435/dsp01vt150n32t
Title: | Synergy of Coupled Kink and Tearing Modes in Fast Ion Transport |
Contributors: | Yang, J. Podesta, M. Fredrickson, E. U. S. Department of Energy |
Keywords: | Energetic Particles Tearing Modes Tokamak Transport Kick Model |
Issue Date: | Feb-2021 |
Publisher: | Princeton Plasma Physics Laboratory, Princeton University |
Related Publication: | Plasma Physics and Controlled Fusion |
Abstract: | One 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 transpor |
URI: | http://arks.princeton.edu/ark:/88435/dsp01vt150n32t |
Appears in Collections: | NSTX-U |
Files in This Item:
File | Description | Size | Format | |
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README.txt | 167 B | Text | View/Download | |
ARK_DATA.zip | 14.41 MB | Unknown | View/Download |
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