A 5.5 T superconducting magnet system with conduction cooling used for calibration has been designed by using NbTi/Cu wire. It provides a high homogeneity field of sixth-orders. The magnet system has a warm bore of 35 mm to ensure that the calibrated Hall probe can be easily inserted and positioned. The magnet is cooled down to superconducting state by a two-stage cryocooler with a capacity of 1.5 W at 4.2 K and is operated at 270 A. The magnet uses a combination of soft connection and cryogenic heat pipe (≤ 300 mL) for conduction cooling. It can be seen from the results that the magnetic field homogeneity does not exceed 15 parts per million (ppm) in φ20 mm × 20 mm at the central axis and about 5 ppm in φ10 mm × 10 mm at the central axis. The magnetic field deviation analysis was carried out in the article to provide guidance for coil manufacturing. At the same time, a supporting cryostat system was designed; the structure design and thermal analysis of the cryostat were carried out.

使用NbTi / Cu线设计了带有传导冷却功能的5.5 T超导磁体系统，用于校准。它提供了六阶的高同质性场。磁铁系统具有35毫米的加热孔，以确保可以轻松地插入和定位经过校准的霍尔探头。磁体由容量为4.2 W的1.5 W的两级低温冷却器冷却至超导状态，并在270 A下工作。该磁体使用软连接和低温热管（≤300 mL）的组合进行传导冷却。从结果可以看出，在中心轴处的磁场均匀度在φ20mm×20 mm处不超过百万分之15（ppm），在φ10mm×10 mm处的磁场均匀度不超过约5 ppm。在文章中进行了磁场偏差分析，为线圈制造提供了指导。同时，设计了一个支持的低温恒温器系统；进行了低温恒温器的结构设计和热分析。