(RE)Ba2Cu3O7-d (REBCO) coated conductors are becoming a preferred wire choice for many potential high temperature superconducting (HTS) applications, where additional metal layers are usually attached to the REBCO conductors to improve reliability and stability. In such cases, the eddy current loss in the metal layers is affected by the magnetic field shielding by adjacent REBCO coated conductors. Here we present the ac loss measurement and simulation results in three copper-superconductor stacks comprising a 10-mm-wide Fujikura-coated conductor with one, two, and four 0.1-mm-thick, 10-mm-wide copper strips, under various applied magnetic field angles (defined by the angle between the applied magnetic field and the wide face of the superconductor) from 15° to 90° at 77 K. The amplitude of the magnetic field is up to 100 mT. The shielding effect, which reduces the eddy current loss in the metal layers stacked with a superconductor layer, increases with decreasing field angles, due to the change of the effective penetration field at the different field angles. The eddy current loss in the copper strips in the copper-superconductor stacks under the magnetic fields with various orientations is dominated by the perpendicular magnetic field component.

中文翻译：

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(RE)Ba2Cu3O7-d涂层导体对不同方向交流磁场下相邻金属层涡流损耗的屏蔽效应

(RE)Ba2Cu3O7-d (REBCO) 涂层导体正成为许多潜在高温超导 (HTS) 应用的首选导线，在这些应用中，通常会在 REBCO 导体上附加额外的金属层以提高可靠性和稳定性。在这种情况下，金属层中的涡流损耗会受到相邻 REBCO 涂层导体的磁场屏蔽的影响。在这里，我们展示了三个铜超导体堆叠的交流损耗测量和模拟结果，包括一个 10 毫米宽的藤仓涂层导体，带有一个、两个和四个 0.1 毫米厚、10 毫米宽的铜带，在各种不同的条件下外加磁场角（由外加磁场与超导体宽面之间的角度定义）在 77 K 时从 15° 到 90°。磁场的幅度高达 100 mT。屏蔽效果，由于有效穿透场在不同场角下的变化，因此减少了与超导体层堆叠的金属层中的涡流损耗，随着场角的减小而增加。在不同方向的磁场作用下，铜超导体叠层中铜带的涡流损耗主要由垂直磁场分量决定。