Development of ITER-CS model coil terminal assembling by using indium wires

The ITER-CS model coil was fabricated and its performance test was successfully carried out. The assembling technique by using indium wires was developed for the terminal joints. The short samples were fabricated to establish the technique and their joint resistance was low enough (∼4 nΩ at 4.5 T, 50 kA). This technique was applied to the assembling of seven joints in the CS model coils and the assembling was successfully completed. It has been confirmed in the performance test that the resistance of these joints is lower than 5 nΩ. According to these results, it can be concluded that the developed assembling technique by using indium wires is applicable and useful to the terminal joints of superconducting coils with the large-current conductors.