Current-Carrying Capacity of YBa2Cu3O7-Coated Conductors for a 30 T Superconducting Magnet

概要

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A 30 T superconducting magnet employing Ag/YBa2Cu3O7/Hastelloy (Y123) coated conductors would make precise fundamental research much more accessible. In order to investigate the feasibility of such a magnet, the current stability of the conductor was examined at 30 T for $B\varparallel c$. Liquid helium cooled Y123-coated conductors with copper and silver stabilizing layers were examined for coil quench issues. Instability conditions were studied using a static zero-dimensional model for various copper stabilizing-layer thicknesses. The calculations indicate the existence of a stable sharing current in the copper stabilizer, of about 0.7 A per 1 μm of copper thickness at 30 T in liquid helium. This sharing current in the copper stabilizer can be added to the 140% critical current of the Y123 conductor at 30 T for $B\varparallel c$.
Japan Society of Applied Physicsの論文
2008-08-25