CRITICAL CURRENT MEASUREMENTS USING 13-T SPLIT COILS AND 100-KA SUPERCONDUCTING TRANSFORMER

A large scale superconductor test facility, which is composed of a 13-T magnetic field and a 100-kA sample current, is operating at the Japan Atomic Energy Research Institute (JAERI). A superconducting transformer with a 100-kA secondary conductor was fabricated as a current amplifier in order to supply the 100-KA sample current. Superconducting split coils with 100-mm clear bore diameter were fabricated and a 13-T available field was generated by these coils. Both the 100-KA superconducting transformer and the 13-T superconducting split coils are installed in a 2-m diameter FRP dewar for the purpose of testing large scale superconductors. This report describes the performance of the 100-kA superconducting transformer and the 13-T superconducting split coils as well as the results from critical current measurements of prototype conductors for toroidal coils.