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Report No.
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Design and development of lower divertor for JT-60SA

Sakurai, Shinji; Higashijima, Satoru; Kawashima, Hisato; Shibama, Yusuke; Hayashi, Takao; Ozaki, Hidetsugu; Shimizu, Katsuhiro; Masaki, Kei; Hoshino, Katsumichi; Ide, Shunsuke; Shibanuma, Kiyoshi; Sakasai, Akira

Lower single null closed divertor with vertical target will be installed at the start of the experiment phase for JT-60 Super Advanced (JT-60SA). Reproducibility of brazed CFC (carbon fiber composite) monoblock targets for a divertor target has been significantly improved by precise control of tolerances and metallization inside CFC blocks. Divertor cassette with fully water cooled plasma facing components and remote handling (RH) system shall be employed to allow long pulse high performance discharges with large neutron yield and they are designed compatible with limited position and size of maintenance ports. Static structural analysis for dead weight, coolant pressure and electromagnetic forces shows that displacement and stress in the divertor module are generally small.

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