Pulling Rod Structure with Flexible Adjustment Capability for Suspending the Cold Mass of a Large-Bore MCZ Magnet System: A Novel Application Investigation

Superconducting magnets’ coils need rods for suspension in vacuum dewars to minimize heat conduction. Previously, rod sets had to be custom-matched to specific magnet models, hindering interchangeability. However, designing or repairing magnets required new rod manufacturing, which was costly and time-consuming, especially with low-conductivity composite materials. In this study, a design of a multi-branch support structure with various adjustment functions is evaluated, which is applied to a customized MCZ superconducting magnet and tested for a long period. Those obtained results show that a new multi-branch rod design with adjustable functions developed for a custom MCZ magnet could effectively improve material strength utilization to 85.14% and reduce the cross-sectional area by 16.22%. Then, the heat leakage is cut significantly. The 50 K cold shield opening was also reduced by 5196 mm2, lowering heat radiation by 45%. The assembly time period was shortened to 47 min. The innovation of this study proved that the novel pulling rod structure addresses the issues of traditional rods.