AC Losses of Copper Stabilized Multifilament YBCO Coated Conductors

摘要

We report the data on magnetization losses and critical current ofmultifilament copper stabilized coated conductors. Eight centimeters longsamples of copper stabilized YBa2Cu3O7-x (YBCO) coated conductors manufacturedcommercially were subdivided into superconducting filaments by near-IR lasermicromachining. The width of the superconducting stripes was varied from 0.2 mmto 0.04 mm. Some of the samples were striated leaving superconducting bridgesfor current sharing between the filaments. The AC losses were measured atdifferent sweep rates of the magnetic field up to 14 T/s. We will present theresults for the hysteresis and coupling losses and discuss the means to reducethe coupling loss by changing the processing parameters of micromachining andby post-ablation treatment.