2009 Fiscal Year Final Research Report
Diamagnetic property and transport current degradation of A15 superconductor by strain
| Project/Area Number |
19360135
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
NISHIMURA Arata National Institute for Fusion Science, 炉工学研究センター, 教授 (60156099)
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| Co-Investigator(Kenkyū-buntansha) |
HISHINUMA Yoshimitsu 核融合科学研究所, 炉工学研究センター, 助教 (00322529)
NISHIJIMA Gen 東北大学, 金属材料研究所, 助教 (30333884)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 高磁場 / 超伝導 / A15 / 輸送電流 / 磁化 |
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| Research Abstract |
A Walters' spiral apparatus was developed. Using the apparatus, a degradation of critical current, which is the maximum transport current, can be investigated for Nb_3Sn superconductor as a typical A15 superconductor for a high magnetic field use. A practical Nb_3Sn superconductor was soldered onto the Walters' spiral and immersed in liquid helium in an 18-T superconducting magnet. The transport current and the magnetic properties were investigated at 4.2K, 18T. 1.0% strain application caused a remarkable degradation in transport current property. However, a clear change in magnetic property was not observed.
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