| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-05-02 |
| タイトル |
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タイトル |
Two types of helical-core equilibrium states in tokamak plasmas |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
S. Kawagoe
A. Ishizawa
Aiba Nobuyuki
Y. Nakamura
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Helical distortion in the core region and its formation mechanism in weakly reversed magnetic shear tokamak plasmas are investigated using three-dimensional magnetohydrodynamic (MHD) equilibrium calculations and MHD stability analysis. It is found that there are two different types of helical equilibrium states: one is a rigid-body shift in the core region on a poloidal cross-section, while the other is a local advection only around the magnetic axis. Linear stability analysis of the corresponding axisymmetric equilibrium is carried to understand the origin of these two types of helical equilibrium states. The analysis shows that the former is related to the current-driven internal-kink instability, while the latter is linked to the pressure-driven quasi-interchange instability. The kink-mode-driven helical equilibrium state appears when the minimum value of the safety factor qmin is close to unity, while the quasi-interchange-driven helical equilibrium state appears when qmin is below unity. The appearance of the quasi-interchange state is attributed to the weak magnetic shear at the inner q = 1 rational surface and finite β. |
| 書誌情報 |
Plasma Physics and Controlled Fusion
巻 64,
p. 106004-10pp,
発行日 2023-01
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| 出版者 |
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出版者 |
IOP Publishing |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0741-3335 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1088/1361-6587/ac828c |
