Abstract
The ITER current leads will transfer large currents of up to 68 kA into the biggest superconducting magnets ever built. Following the development of prototypes and targeted trials of specific manufacturing processes through mock-ups, the ASIPP (Chinese Institute of Plasma Physics) is preparing for the series fabrication. A key component of the ITER HTS current leads are the resistive heat exchangers. Special R&D was conducted for these components at CERN and ASIPP in support of their designs. In particular several mock-ups were built and tested in room temperature gas to measure the dynamic pressure drop and compare to 3D CFD models.
Highlights
The Current Leads (CL) are key components of the ITER superconducting magnet system
The CLs provide the cold/warm transitions for the large currents fed to the ITER superconducting coils from the warm power supply and distribution system
The defined assembly tolerance H7/g6 between the HX core and the external sleeve is important for the current lead performance, as it minimizes the amount of gas bypassing the HX core
Summary
The Current Leads (CL) are key components of the ITER superconducting magnet system. The CLs provide the cold/warm transitions for the large currents fed to the ITER superconducting coils from the warm power supply and distribution system. ITER requires a total of 60 current leads, 18 for the TF coil system, 12 for the CS coil system, 12 for the PF coil system and 18 for the correction coil system, with a total current capacity of approximately 2.6 MA.
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