Spatially-resolved measurement on time-dependent electromagnetic behavior in alternating current carrying coated conductor

Higashikawa, Kohei; Honda, Yoshihiro; Inoue, M.; Iwakuma, Masataka; Kiss, Takanobu; Nakao, Kōichi; Yamada, Yutaka; Izumi, Teruo

doi:10.1016/j.physc.2010.05.093

Cited by 3 publications

(1 citation statement)

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“…A SHPM system [15], [16] was utilized to visualize current distribution in the sample. Distribution of self-field around the sample induced by a transport current was measured by scanning a Hall-sensor.…”

Section: B Measurement For Sheet Current Density Distributionmentioning

confidence: 99%

Investigation of Three-Dimensional Current Distribution at Silver Diffusion Joint of RE-123 Coated Conductors Based on Magnetic Microscopy Combined With Finite Element Method

Higashikawa

Honda

Inoue

et al. 2011

IEEE Trans. Appl. Supercond.

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Combining scanning Hall-probe microscopy (SHPM) with finite element method (FEM), we have investigated three-dimensional current distribution at a silver diffusion joint of RE-123 coated conductor (CC). This research aims at the understanding of electromagnetic behaviors in a jointed CC and at the establishment of an analysis model for it. Two-dimensional distribution of sheet current density in a jointed sample was visualized by a SHPM measurement with a spatial resolution of a few hundred micrometers. Then, it was found that such a distribution included information about current transfer between the jointed pieces. Furthermore, the experimental results were successfully reconstructed by a three-dimensional FEM analysis. We believe that these will be very important findings for the establishment of jointing processes on CCs and for the designs of practical applications which need such processes. Index Terms-coated conductor, current distribution, finite element method, joint, scanning Hall-probe microscopy I. INTRODUCTION HE second-generation high temperature superconducting (HTS) tapes such as RE-123 (RE: Y, Gd and so on) coated conductors (CCs) have been developed steadily [1]-[3], and electric power applications comprising CCs have been studied strenuously in particular [4]-[7] from their potential of AC losses reduction [8]-[10] On the other hand, jointing processes on CCs will be indispensable for such applications considering their maintenance and large scale. Of course, an important Manuscript received

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Section: B Measurement For Sheet Current Density Distributionmentioning

confidence: 99%

Investigation of Three-Dimensional Current Distribution at Silver Diffusion Joint of RE-123 Coated Conductors Based on Magnetic Microscopy Combined With Finite Element Method

Higashikawa

Honda

Inoue

et al. 2011

IEEE Trans. Appl. Supercond.

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Noncontact Characterization of In-Plane Distribution of Critical Current Desity in Multifilamentary Coated Conductor

Higashikawa

Shiohara

Inoue

et al. 2012

IEEE Trans. Appl. Supercond.

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Characterization Techniques for Local Critical Current Densities in HTS Tapes

Kiss¹

2014

TEION KOGAKU

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The high spatial homogeneity of critical current density, J c , in HTS tape is one of the most important requirements to realize practical superconducting tapes. However, it is hardly possible to detect local J c distribution using conventional characterization techniques because the length scale of such J c variation is several orders smaller than that of the conventional techniques. We have succeeded in developing novel techniques such as low-temperature laser scanning microscopy and reel-toreel Hall probe scanning microscopy for spatially resolved measurements of local J c in HTS tapes of multiple lengths and operating conditions. In this paper, I summarize these techniques together with other useful methods including magneto-optical imaging and the Hall sensor array technique.

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Spatially-resolved measurement on time-dependent electromagnetic behavior in alternating current carrying coated conductor

Cited by 3 publications

References 10 publications

Investigation of Three-Dimensional Current Distribution at Silver Diffusion Joint of RE-123 Coated Conductors Based on Magnetic Microscopy Combined With Finite Element Method

Investigation of Three-Dimensional Current Distribution at Silver Diffusion Joint of RE-123 Coated Conductors Based on Magnetic Microscopy Combined With Finite Element Method

Noncontact Characterization of In-Plane Distribution of Critical Current Desity in Multifilamentary Coated Conductor

Characterization Techniques for Local Critical Current Densities in HTS Tapes

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