| Project/Area Number |
12680487
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
HASHLZUME Hidetoshi Tohoku University, Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (80198663)
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| Co-Investigator(Kenkyū-buntansha) |
KLTAJLMA Sumio Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (30161475)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥2,800,000 (Direct Cost: ¥2,800,000)
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| Keywords | High Tc superconductor / Remountable magnet / Butt jointing / Fusion reactor / 高温超電導 |
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| Research Abstract |
Experimental results show that the contacting performance of butt jointing method is better than that of lapping method used in traditional jointing method with low temperature solder. The contact resistance is about 2 micro ohm in case of Bi2223 superconducting tape (4mm x 0.3mm cross section) under 90% of its crilical surrent. This value is small enough to design the remountable superconducting magnets. In case of the flvelayer laminated superconductina tape, the resistance is reduced to 1 micro ohm. The resistance, however, increases when the transport current exceeds 90A, whose value is much less than the critical current of the laminated superconducting tape. This is maybe due to the relatively smallcornpressive stress acting on the cross section and experimental extrapolated results requires about 100Mpa to achieve the desirable results.
The numerical results show that the performance does not deaend on relative location of SC filaments in each tape, which means that the butt jointing method has large feasibility for the magnet of fusion reactors.
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