4.5 T量子计算用超导磁体系统研制

Development of 4.5 T superconducting magnet system for quantum computing

针对超导量子计算系统所需要的背景磁场环境,研制了一套中心场强4.5 T,中心孔径60 mm的超导磁体系统。该磁体系统采用密绕的NbTi线圈来提供磁场,并由稀释制冷机实现低温环境。对磁体线圈和骨架进行了应力校核,验证了结构的稳定性与可靠性。此外还介绍了磁体制造的工艺流程,并通过实验验证了磁体的性能,表明了该磁体系统的磁场强度和磁场均匀性满足用户要求。

A superconducting magnet system with a central field intensity of 4.5 T and a central aperture of 60 mm was developed for the background magnetic field environment required by the superconducting quantum computing system. The magnet system used densely wound NbTi coils to provide the magnetic field, and a low temperature environment was achieved by a dilution refrigerator. The stress of the magnet coil and skeleton was checked to verify the stability and reliability of the structure. In addition, the manufacturing process of the magnet was introduced, and the performance of the magnet was verified by experiments. It shows that the magnetic field intensity and magnetic field uniformity of the magnet system can meet the user’s requirements.