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标题：Performance Boost in Industrial Multifilamentary Nb3Sn Wires due to Radiation Induced Pinning Centers
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作者：T. Baumgartner ; M. Eisterer ; H. W. Weber 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep10236
语种：English
出版社：Springer Nature
摘要：We report non-Cu critical current densities of 4 . 09 ⋅ 10⁹ A/m² at 12 T and 2.27 ⋅ 10⁹ A/m² at 15 T obtained from transport measurements on a Ti-alloyed RRP Nb₃Sn wire after irradiation to a fast neutron fluence of 8.9 ⋅ 10²¹ m⁻². These values are to our knowledge unprecedented in multifilamentary Nb₃Sn, and they correspond to a J _c enhancement of approximately 60% relative to the unirradiated state. Our magnetometry data obtained on short wire samples irradiated to fast neutron fluences of up to 2.5 ⋅ 10²² m⁻² indicate the possibility of an even better performance, whereas earlier irradiation studies on bronze-processed Nb₃Sn wires with a Sn content further from stoichiometry attested a decline of the critical current density at such high fluences. We show that radiation induced point-pinning centers rather than an increase of the upper critical field are responsible for this J _c enhancement, and argue that these results call for further research on pinning landscape engineering.