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Advanced fusion technologies developed for JT-60 superconducting tokamak

A. Sakasai, S. Ishida, M. Matsukawa, N. Akino, T. Ando, T. Arai, K. Ezato, K. Hamada, H. Ichige, T. Isono2004年被引用 12Nuclear FusionIF 3出版社

Modification of JT-60 as a full superconducting tokamak (JT-60SC) is planned. The objectives of the JT-60SC programme are to establish scientific and technological bases for steady-state operation of high performance plasmas and utilization of reduced-activation materials in an economically and environmentally attractive DEMO reactor. Advanced fusion technologies relevant to the DEMO reactor have been developed for the superconducting magnet technology and plasma facing components of the JT-60SC design. To achieve a high current density in a superconducting strand, Nb3Al strands with a high copper ratio of 4 have been newly developed for the toroidal field coils (TFCs) of JT-60SC. The R&D to demonstrate the applicability of the Nb3Al conductor to TFCs by a react-and-wind technique has been carried out using a full-size Nb3Al conductor. A full-size NbTi conductor with low ac loss using Ni-coated strands has been successfully developed. A forced cooling divertor component with high heat transfer using screw tubes has been developed for the first time. The heat removal performance of the carbon fibre composite target was successfully demonstrated on an electron beam irradiation stand.

日本語訳

JT-60を完全超伝導トカマク(JT-60SC)へ改造する計画である。JT-60SC計画の目的は、高性能プラズマの定常運転と、経済的かつ環境的に魅力的なDEMO炉における低放射化材料の利用のための科学的・技術的基盤を確立することである。DEMO炉に関連する先進核融合技術は、JT-60SC設計の超伝導磁石技術とプラズマ対向機器のために開発されてきた。超伝導素線の高電流密度を達成するため、銅比4の高いNb3Al素線がJT-60SCのトロイダル磁場コイル(TFCs)用に新たに開発された。リアクト・アンド・ワインド法によるTFCsへのNb3Al導体の適用可能性を実証するための研究開発が、実寸大のNb3Al導体を用いて実施された。Ni被覆素線を用いた低交流損失の実寸大NbTi導体が首尾よく開発された。スクリューチューブを用いた高熱伝達の強制冷却ダイバータ部品が初めて開発された。炭素繊維複合材料ターゲットの除熱性能が、電子ビーム照射スタンドで首尾よく実証された。

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jt-60sa高精度(タイトル一致)

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