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Length Uniformity of the Angular Dependences of Ic and n of Commercial REBCO Tapes with Artificial Pinning at 77 K

One of the most significant and basic parameters connected with the performance of rare earth-based coated conductor is the angular dependence of their critical current. Because of the complex tape architecture, complicated production process and long length of coated superconducting tapes, the angular dependence homogeneity of the superconductor along the conductor length Ic(B) needs to be evaluated. In this paper, the homogeneity of several samples of SuperPower tapes manufactured between 2008 and 2014 was examined for fields up to 600 mT. It was found that, for a given sample, the variation of results of the critical current is at most 6.7%. In addition, the uniformity is dependent on the angular arrangement of the tape in the external magnetic field.