Investigation of in-field critical current on high-temperature coated conductor for optimal design of nano-scale defect

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420273
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Kyushu University
• Principal Investigator: Inoue Masayoshi 九州大学, システム情報科学研究院, 准教授 (80346824)
• Research Collaborator: KIMURA Kazunari
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 高温超伝導 / 超伝導線材 / 臨界電流 / 電流電圧特性 / 強磁場 / X線CT

Outline of Final Research Achievements

We have investigated current transport property of REBCO coated conductors over a wide range of temperature (4.2K to 77K) & external magnetic field (self-field to 27T) and expressed it by using our proposed model based on a percolation transition model and scaling law of macroscopic pinning force density. Moreover, we confirmed in-field critical current at low temperature can be predicted from that at liquid nitrogen temperature by choosing certain conditions of magnetic field. These results are useful and effective not only for optimal design of electric power devices but also for feed-back to production of REBCO coated conductors.

Free Research Field

超伝導工学、計測・制御工学