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首页> 外文期刊>IEEE Transactions on Applied Superconductivity >Scaling of the critical current in ITER type niobium-tin superconductors in relation to the applied field, temperature and uni-axial applied strain
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Scaling of the critical current in ITER type niobium-tin superconductors in relation to the applied field, temperature and uni-axial applied strain

机译：ITER型铌锡超导体中的临界电流与施加场，温度和单轴施加应变的比例关系

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摘要

The three dimensional surface of the critical current density versus field and temperature J/sub c/(B,T) of niobium-tin is a function of the strain state of the superconductor. A brief review of literature on this subject is presented. The J/sub c/(B) function is described by the relations for flux pinning. The temperature and strain dependencies are added to this relation, This results in a unifying scaling law for A15 materials, which is verified for different niobium-tin conductors with respect to all the relevant variables, i.e. field, temperature and uni-axial strain. Nb/sub 3/Sn conductors from 9 manufacturers are measured in the frame work of the third ITER benchmark tests on critical current. The investigated ranges are: applied field from 7 to 13 T, temperature from 4.2 to 8 K and applied strain from -0.4 to +0.8%. Special attention is paid to the region of compressive axial strain, which is the most relevant state of strain for superconductors under thermal compression in practical applications.
机译：铌-锡的临界电流密度与磁场和温度J / sub c /（B，T）的三维关系是超导体应变状态的函数。简要介绍了有关该主题的文献。 J / sub c /（B）函数由磁通钉扎的关系描述。温度和应变相关性被添加到该关系中，这导致了A15材料的统一缩放定律，并针对所有相关变量（即场，温度和单轴应变）针对不同的铌锡导体进行了验证。在有关临界电流的第三次ITER基准测试框架中对来自9个制造商的Nb / sub 3 / Sn导体进行了测量。研究范围为：施加的电场为7至13 T，施加的温度为4.2至8 K，施加的应变为-0.4至+ 0.8％。特别要注意轴向压缩应变的区域，在实际应用中，这是超导体在热压缩下最相关的应变状态。

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