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Design and construction of the LHD plasma vacuum vessel

N. Inoue, A. Komori, H. Hayashi, H. Yonezu, O. Motojima1998年Fusion Engineering and DesignIF 1.7出版社

AbstractIn the reactor design, many components are installed in a narrow space between the superconducting coil and the plasma. In the large helical device (LHD) configuration, the plasma axis is shifted inwards relative to the centre of the two pairing helical coils, and so the space available for thermal insulation, the vacuum vessel, cooling pipes and the first wall is very narrow. The LHD plasma vacuum vessel maintains good vacuum conditions, removes heat from the plasma, and protects superconducting coils from the plasma heat. The vessel is designed to have enough rigidness for stress deformation. In the construction, to facilitate assembly with the helical coils which were completed earlier, the vacuum vessel was fabricated in sections of many small segments. Design and construction of the LHD plasma vacuum vessel is described. These technologies are also quite important to reactor design.

日本語訳

原子炉設計において、超伝導コイルとプラズマの間の狭い空間には多くの構成要素が設置される。大型ヘリカル装置(LHD)の配位では、プラズマ軸は2つの対をなすヘリカルコイルの中心に対して内側にシフトしているため、断熱、真空容器、冷却配管、第一壁に利用できる空間は非常に狭い。LHDプラズマ真空容器は、良好な真空状態を維持し、プラズマからの熱を除去し、プラズマ熱から超伝導コイルを保護する。容器は、応力変形に対して十分な剛性を有するように設計されている。建設においては、先行して完成していたヘリカルコイルとの組み立てを容易にするため、真空容器は多数の小分割セグメントに分けて製作された。LHDプラズマ真空容器の設計と建設について述べる。これらの技術は、原子炉設計にとっても極めて重要である。

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