Joints between low temperature and high temperature superconducting materials for future magnet systems

The next generation of ultra-high field magnets will rely on the unique properties of high temperature superconducting (HTS) materials in the highest field regions, but will also use cheaper conventional low temperature superconducting (LTS) materials like NbTi and Nb3Sn for the lower field areas.  Magnets would be much simpler to build if superconducting joints could be made first between lengths of HTS REBCO coated conductor materials, and  also between HTS and LTS materials, but there have been no reliable processing strategies yet designed to manufacture these HTS/LTS  joints.  The student, working closely with our industrial partners Oxford Instruments and Siemens Healthineers, and with partners at CERN, will use facilities in the Centre for Applied Superconductivity ( to study the feasibility of making joints between state of the art commercial superconducting materials, to understand how to control unwanted reactions at the joint interfaces and to measure their performance. There will be opportunities for the student to spend time in the laboratories of these partners, and to become an expert in the correlation of microstructure with superconducting properties of materials critical for future magnet designs.

High current joints measured as a function of applied magnetic field

High current joints measured as a function of applied magnetic field

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