Abstract
Samples of 10 T-2.5 kA (Nb-Ti) 3Sn cable-in-conduit type superconductors with a void fraction in cable space 39.9% and 46.6% were developed and two small one-layer solenoid coils (10 turns, 7.5 m conductor length) were manufactured by a wind and react method. Several verification tests were performed under the condition of 10.8 T uniform backup field and mass flow rate of the supercritical helium m ̇ = 0 g s −1 ≈ 4 g s −1 at 4.2 K, 0.45 MPa. Quench simulations were also made with one-dimensional transient analysis code. It was found that the stability margins of these coils were proved to be large enough to apply for the fusion magnets and the experimental data such as stability margin and normal zone propagation velocity were in good agreement with the calculation results.
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