| Project/Area Number |
25420892
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAMADA Shuichi 自然科学研究機構, 核融合科学研究所ヘリカル研究部, 准教授 (50249968)
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| Co-Investigator(Renkei-kenkyūsha) |
KIKUCHI Akihiro 国立研究開発法人物質・材料研究機構, 超伝導線材ユニット, 主席研究員 (50343877)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | MgB2 / ホウ素同位体 / 臨界電流特性 / 核融合応用 / 引張変形 / 二硼化ﾏｸﾞﾈｼｳﾑ / 低放射化 / 同位体 / 核融合 / 加速器 / 導体設計 / 複合材料 |
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| Outline of Final Research Achievements |
MgB2 wire is one of the alternative superconducting materials of Nb-Ti wire for the low activation superconducting magnet system to an advanced fusion reactor. We succeeded to fabricate in-situ MgB2 wire using the B-11 isotope powder without nuclear transformation in order to enhance the stability against the neutron irradiation. Jc value was improved with smaller average particle size of the B-11 isotope powder, and the amorphous B-11 isotope powder sample was obtained to above 1,000A/mm2 at 4.2 K under 3 T. Jc-B performance of the amorphous B-11 isotope sample was higher than that of the crystallized B-11 isotope powder. We found that the finer particle amorphous isotope powder was preferable as the boron source material of the low activation MgB2 wires.
On the other hand, Jc property under the tensile deformation was improved until 500 MPa of tensile stress. This was caused by the internal compressive stress mitigation around the MgB2 core region due to the tensile deformation.
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