1.5T MgB_2超导实验磁体的设计和研制

Design and Development of a 1.5T MgB_2 Test Magnet

采用Fe、Ni复合基底、矩形截面的MgB2超导带材,设计了一个孔径为100mm的实验磁体,以该磁体为基础,进行了中心磁场可达1.5T的制冷机传导冷却MgB2超导MRI磁体系统研究,提出了采用MgB2超导接头制作持续电流开关及改善磁体温度均匀性的技术途径,绕制并实验了其中心螺管线圈,该线圈在105A工作电流下,产生的中心磁场为0.74T。

For demonstrating the feasibility in the magnetic resonance imaging （MRI） usage and exploring the design and development of MgB2 magnets, a magnet with 100 mm bore using MgB2/Fe/Cu/Ni tape was designed. Special cares were taken to enhance the cooling conditions and the time stability. The central coil （No. 1 coil） was winded and tested. The field generated by the No. 1 coil was ～ 0.74 T.