Abstract
10T-2.5kA (NbTi)3Sn cable-in-conduit type superconducting conductors varying a void fraction in cable space 39.9% and 46.6% were developed and two small one-layer solenoid coils (10 turns) were manufactured by a wind & react method. Several verification tests were performed under the condition of 10T uniform back-up field and mass flow rate of the supercritical helium ·0g/s ~4g/s at 4.2K, 0.45MPa. It was found that the stability margins of these coils were large enough to apply for the fusion magnet and the normal propagation velocity was about 4m/s at the rated current. The friction factors of these conductors were little larger than those reported in the other data of cable-in-conduit type conductors.
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