Test Facility for Joints of Subsize Cable-in-Conduit Conductors for NET/ITER Winding Studies
The joints between superconducting cables of the ITER coils present a major problem to be solved. A low resistance is required for the cooling, whereas small losses in variable magnetic field are needed for the stability. Different types of joints have already been suggested1,2. Some preliminary measurements2,3 have already been made on prototypes of joints cooled in a helium bath at 4.2 K and for low currents.
The test facility presented herein allows testing joint prototypes at the 1/8th scale (current up to 10 kA). These joints are cooled under the same conditions as those of ITER, by circulation of supercritical helium. A dipole allows submitting the joint to magnetic fields up to 4 teslas and to field variation rates up to dB/dt = 42 T/s.
KeywordsTitanium Convection Chrome Europe Helium
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