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Report No.

Design and development of the current feeding system for superconducting coils of JT-60SA

Kizu, Kaname; Murakami, Haruyuki; Natsume, Kyohei; Tsuchiya, Katsuhiko; Koide, Yoshihiko; Yoshida, Kiyoshi; Obana, Tetsuhiro*; Hamaguchi, Shinji*; Takahata, Kazuya*

The current feeding system for superconducting magnets of JT-60SA were designed. Key components concerned were developed and tested. Trial manufacturing of crank shaped feeder to reduce the thermal stress showed the max. dimensional error of 3 mm. The compact tool to connect the feeder joint with solder vertically was developed. The joint resistance of feeder joint sample was 2n $$Omega$$ within the requirement of $$<$$ 5n$$Omega$$. Feeder insulation samples showed sufficient shear strength. Since all the manufacturing processes concerned were confirmed, the production of CTBs and feeders can be started.



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