| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-02-13 |
| タイトル |
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タイトル |
Completion of all nine ITER toroidal field coils in Japan |
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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 |
Nakamoto Mio
Kajitani Hideki
Hemmi Tsutomu
Takano Katsutoshi
Sakamoto Kazuyuki
Tsutsumi Fumiaki
Saito Kengo
Tatsuya Shimizu
Baba Takashi
Kasai Yuma
Isono Takaaki
Nakahira Masataka
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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 |
The fabrication of nine ITER toroidal field coils (TFCs) has been completed successfully in Japan. When a set of 18 TFCs are installed around the ITER vacuum vessel, it generates a plasma-confinement magnetic field. To achieve the required plasma-confinement quality, the error field should be limited to 50 ppm of the nominal toroidal field. This error field requirement is propagated to each component of the magnet system as manufacturing and assembly tolerances. For each TFC, this requirement is given in terms of current center line (CCL) tolerances. Even though the TFC is a gigantic module of 9 m wide and 16.5 m high, the positional tolerances allowed for its CCL is 2.6 mm in diameter at the straight portion and ±3.0 mm in lateral direction at the curved portion. On the other hand, limiting TFC assembly misalignments is also important in the minimization of the error field. Therefore, sub-millimeter profile tolerances are defined on the important interfaces of TFCs while the manufacturing of a TFC involved welding of 40 to 100 mm thick austenitic stainless steel. The completion of all nine TFCs is realized by the techniques developed through discussions and trials along the fabrication process. High accuracy, three-dimensional measurements with laser trackers were introduced to record the fabrication outcomes in each step and to feedback the data to the next step. Based on the measurement results accumulated in the process, the manufacturing results of all nine TFCs were evaluated in the view of its CCL quality and interface tolerances. |
| 書誌情報 |
IEEE Transactions on Applied Superconductivity
巻 34,
号 5,
p. 1-7,
発行日 2024-01
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| 出版者 |
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出版者 |
IEEE |
| 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 |
1558-2515 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1109/TASC.2024.3351951 |
