Artificial Pinning Centers

第二阶段SBIR奖励关注的是增加 超导导线所能承载的最大电流。 超导导线材料是铌-钛（NbTi）， 超导磁体中常用的材料。 的方法 是引入人工钉扎中心，杂质材料 引入以防止磁通线的移动。 一 最大载流能力的2倍 在中强磁场下的超导导线， 寻找。 最大载流量的增加 再加上通过新的 引入钉扎中心的方法预计将减少 超导体的成本是这样的应用， 医学上的共振成像 第二阶段研究是基于第一阶段研究， 每平方毫米7500安培的电流密度， 3特斯拉，一个相对较低的磁场，实现了在NbTi。

This Phase II SBIR award is concerned with increasing the maximum current that can be carried by superconducting wire. The superconducting wire material is Niobium-Titanium (NbTi), a material commonly used in superconducting magnets. The approach is to introduce artificial pinning centers, impurity material introduced to prevent the movement of magnetic flux lines. A factor of 2 in the maximum current carrying capacity of superconducting wires at medium to high magnetic fields is sought. The increase in maximum current carrying capacity together with the reduction in processing costs through the new approach to introduction pinning centers is expected to reduce the superconductor costs is such applications as Magnetic Resonance Imaging in medicine. The Phase II research is based on Phase I research in which a record current density of 7500 amperes per square millimeter at 3 Tesla, a relatively low magnetic field, was achieved in NbTi.