Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas
Source abstract
Abstract
We propose a phenomenological yet general model in a form of extended complex Ginzburg-Landau equation to understand edge-localized modes (ELMs), a class of quasi-periodic fluid instabilities in the boundary of toroidal magnetized high-temperature plasmas. The model reproduces key dynamical features of the ELMs (except the final explosive relaxation stage) observed in the high-confinement state plasmas on the Korea Superconducting Tokamak Advanced Research: quasi-steady states characterized by field-aligned filamentary eigenmodes, transitions between different quasi-steady eigenmodes, and rapid transition to non-modal filamentary structure prior to the relaxation. It is found that the inclusion of time-varying perpendicular sheared flow is crucial for reproducing all of the observed dynamical features.
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Research context
OpenAlex topics: Magnetic confinement fusion research · Solar and Space Plasma Dynamics · Dust and Plasma Wave Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Beijing Computational Science Research Center 1 , Beijing 100193, China
Department of Mathematics, Pohang University of Science and Technology 2 , Pohang, Gyeongbuk 37673, Republic of Korea
National Fusion Research Institute 3 , Daejeon 34133, Republic of Korea
School of Natural Science, Ulsan National Institute of Science and Technology 4 , Ulsan 44919, Republic of Korea
Department of Physics, Pohang University of Science and Technology 5 , Pohang, Gyeongbuk 37673, Republic of Korea
Funding
National Research Foundation of Korea · Ministry of Science, ICT and Future Planning
References (28)
Show source-provided references
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