Abstract

Magnetic diverters are commonly used in order to reduce the AC lossin superconducting coils. However, they have not been proved to work onYBa2Cu3O7−x-coated conductor coils. Moreover, modeling tools are required for predicting the resultingAC loss and understanding the loss mechanisms. In this paper, a coated conductor pancakecoil with ferromagnetic diverter is measured and simulated. The magnetic diverter reducesthe AC loss but the critical current practically does not change. Our simulations show thata diverter wider than that in the measurements can reduce the loss below that of a singlestrip. Therefore, the optimum diverter size should be obtained by simulations.

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