Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5006554 |
| _version_ | 1818200978454740992 |
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| author | Youngmin Oh Hyung Ju Hwang Michael Leconte Minwoo Kim Gunsu S. Yun |
| author_facet | Youngmin Oh Hyung Ju Hwang Michael Leconte Minwoo Kim Gunsu S. Yun |
| author_sort | Youngmin Oh |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-12T02:46:15Z |
| format | Article |
| id | doaj.art-405841b97c93407ab5c4943e15649a34 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-12T02:46:15Z |
| publishDate | 2018-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-405841b97c93407ab5c4943e15649a342022-12-22T00:41:00ZengAIP Publishing LLCAIP Advances2158-32262018-02-0182025224025224-1110.1063/1.5006554099802ADVEffect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmasYoungmin Oh0Hyung Ju Hwang1Michael Leconte2Minwoo Kim3Gunsu S. Yun4Beijing Computational Science Research Center, Beijing 100193, ChinaDepartment of Mathematics, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, Republic of KoreaNational Fusion Research Institute, Daejeon 34133, Republic of KoreaSchool of Natural Science, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of KoreaDepartment of Physics, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, Republic of KoreaWe 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.http://dx.doi.org/10.1063/1.5006554 |
| spellingShingle | Youngmin Oh Hyung Ju Hwang Michael Leconte Minwoo Kim Gunsu S. Yun Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas AIP Advances |
| title | Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| title_full | Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| title_fullStr | Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| title_full_unstemmed | Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| title_short | Effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| title_sort | effect of time varying flow shear on the nonlinear stability of the boundary of magnetized toroidal plasmas |
| url | http://dx.doi.org/10.1063/1.5006554 |
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