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Experimental results of 40-kA Nb3Al cable-in-conduit conductor for fusion machines

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17 Author(s)
Takahashi, Y. ; Superconducting Magnet Lab., JAERI, Ibaraki, Japan ; Sugimoto, M. ; Isono, T. ; Nakajima, H.
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A 40-kA Nb3Al cable-in-conduit conductor has been developed for the toroidal field coils of fusion reactors, because Nb 3Al has excellent mechanical performance. This conductor consists of 405 copper-stabilized multifilamentary strands inserted into a CuNi circular conduit. The Nb3Al strands are fabricated by the Jelly-roll process with a diameter of 1.22 mm. This conductor could be operated up to a current of 46 kA at an external field of 11.2 T. Accordingly, Nb3Al promises to soon become a useful superconductor for large-scale high-field applications, such as fusion machines

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Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 4 )