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Influence of magnetic fields generated by a magnetized ferritic first wall on surface heat loads from plasma heat flux along magnetic field lines
https://repo.qst.go.jp/records/2002782
https://repo.qst.go.jp/records/2002782be4eb4f1-30c2-46f8-8321-c4d3897b685d
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2026-02-17 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Influence of magnetic fields generated by a magnetized ferritic first wall on surface heat loads from plasma heat flux along magnetic field lines | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| 著者 |
Miyoshi Yuuya
× Miyoshi Yuuya
× Yamashita Yushiro
× Weixi Chen
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | Localized concentrations of plasma heat flux (comprising charged particles moving along magnetic field lines) can result in excessive thermal loads whose peak values may exceed several MW/m2, e.g. at the edges of blanket modules. Such conditions are undesirable and have motivated the development of heat load analysis methods, including magnetic field line tracing within the vacuum vessel (VV), as established in our previous work. In JA DEMO, reduced-activation ferritic martensitic steel is employed for the first wall (FW) due to its superior resistance to neutron irradiation. Here, the strong magnetic field in JA DEMO magnetizes the FW, thereby altering the magnetic field configuration in VV and affecting plasma equilibrium. This modified equilibrium, in turn, influences the magnetization vector in FW. Accurate prediction of magnetic field distribution in VV and the heat load distribution on the FW thus necessitates consideration of this mutual interaction between the magnetized FW and the plasma equilibrium. To address this, a computational code capable of evaluating the effect of FW magnetization under JA DEMO-like conditions is developed. The code iteratively computes a three-dimensional MHD equilibrium consistent with the magnetic field generated by the magnetized FW (Bm). Subsequently, plasma heat flux and heat load distributions on the FW are calculated via the magnetic field line tracing. Although Bm is relatively weak and it induces unnoticeable changes in plasma equilibrium, it significantly alters the heat load distribution compared to cases neglecting Bm. In this research, three distinct patterns of Bm influence are identified: (1) cumulative effect of weak Bm altering field line trajectories, (2) strong Bm modifying field line orbit, and (3) strong Bm directly attracting field lines toward the FW. Future work will focus on identifying the specific conditions under which these effects become significant. | |||||||||||
| 書誌情報 |
Fusion Engineering and Design 巻 224, p. 115601, 発行日 2026-01 |
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| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | 10.1016/j.fusengdes.2025.115601 | |||||||||||
