Fabrication of NbTi superconducting joint by electromagnetic forming method

The electrical jointing of superconducting wires/tapes is a key issue for the construction of the scientific superconducting magnet that required high field stability, such as NMR, FTICR-MS and some inertial navigators. In this paper, the preliminary experiment of electromagnetic formed NbTi superconducting joint was done. The fabrication technique was researched by changing the parameters. The joint resistances were tested in liquid helium using coil current decay method. The contact resistance properties of the superconducting joint were investigated. The plastic deformation and the electrical contact characteristics of the NbTi superconducting joint were discussed. The results show that the electromagnetic formed NbTi superconducting joint has the excellent low-resistance property and good repeatability.