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Detection of Critical Current Distribution of YBCO-Coated Conductors Using Permanent Magnet Method

Detection of Critical Current Distribution of YBCO-Coated Conductors Using Permanent Magnet Method,10.1109/TASC.2010.2084053,IEEE Transactions on Appl

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Detection of Critical Current Distribution of YBCO-Coated Conductors Using Permanent Magnet Method  
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We developed a non-destructive and contactless system for measuring the critical current in (YBCO)-coated conductors by using a permanent magnet . This measurement method is based on the re- pulsive force between the magnet and the shielding current in high-temperature superconductor-coated conductors. We measured using a high-resolution load sensor and found that accurate could be determined without the effect of thick copper film on the YBCO thin film and Hastelloy tape of the substrate. We can determine from , which is the maximum repulsive force determined from an extrapolated value of the vs. L curve for mm, described in our previous paper (1). We show that the permanent magnet method can be used to determine the lon- gitudinal distribution and large-scale defects in YBCO-coated conductors. In addition, it turned out from this experiment that the permanent magnet method was effective to rapidly measure the longitudinal distribution of long-scale coated conductors.
Journal: IEEE Transactions on Applied Superconductivity - IEEE TRANS APPL SUPERCONDUCT , vol. 21, no. 3, pp. 3385-3388, 2011
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