A Generalized Model of HTS-HTS Joint Resistance for Superconducting Magnets

Large-scale high temperature superconducting (HTS) magnets usually have tens of double/single pancake coil units. The structural optimization and manufacture of the magnet assembly result in varying axial gaps between adjacent pancakes. This brings additional difficulties for inserting the superconducting joints and dealing with the welding factors such as the gap, welding angle and overlapped length. This article presents the simulation modeling and general joint design guideline of a spiral joint scheme for large-scale HTS magnets and other similar applications. An easy-to-implement model has been built to characterize the physical behaviors of joint resistance. This article explores feasible joint design guidance and performance evaluation solutions for large-scale applications of HTS magnets having a series of HTS-HTS joints among pancake coils.