Non-destructive characterization of long coated conductors using a Hall sensor array

被引：19

作者：

Nakao, K. ^{[1
]}

Machi, T. ^{[1
]}

Miyata, S. ^{[1
]}

Muroga, T. ^{[1
]}

Ibi, A. ^{[1
]}

Watanabe, T. ^{[1
]}

Konishi, M. ^{[1
]}

Yamada, Y. ^{[1
]}

Kitoh, Y. ^{[1
]}

Fuji, H. ^{[1
]}

Aoki, Y. ^{[1
]}

Izumi, T. ^{[1
]}

Shiohara, Y. ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2006年 / 445卷

关键词：

coated conductor tapes; critical current; non-destructive measurement; Y-based cuprates;

D O I：

10.1016/j.physc.2006.05.002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High quality YBa2Cu3O7-delta coated conductors with a length of several hundred meters are available now. For practical applications of long tapes, non-destructive and efficient techniques for characterization are necessary. For that purpose, we installed a commercial machine. The measuring principle is that a tape is introduced into a space of an applied magnetic field and the induced current within the superconducting tape is evaluated by measuring the magnetic field distribution just above the tape surface using a Hall sensor array. The advantages of the technique are that the measurement speed is rather high, 15 mm/s at maximum, and tapes are absolutely safe from damages by excessive heating. On the other hand, the estimation of the critical current is not straightforward because the issue of the calibration is not trivial. A 2D computer simulation code was developed to calculate the distribution of the induced current within the tape. In the simulation, it was assumed that the current-voltage relation of the superconductor obeys a power law. It is shown that the critical current deduced from the measurement is strongly dependent on the n-value. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：669 / 672

页数：4

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