Design and analysis of CFETR magnet current feeder

Abstract

The primary function of CFETR magnet current feeder is to supply and discharge the current for the magnets. The current feeder is directly related to the safe operation of the magnets and has important research significance. In this paper, the design structure of the CFETR magnet current feeder was presented. The engineering design of main components has been nearly completed, including high temperature superconducting current leads(HTSCLs） and busbars, and other critical components. Key analyses and optimization results are provided, followed by discussions and conclusions. The main analysis and optimization are as follows. First, the cooling scheme of the current feeder was analyzed and determined. Second, the mechanical analysis of the current feeder was conducted, confirming that its structure meets the mechanical strength requirements. Third, an electrical performance analysis of the insulation structure was carried out, verifying that its insulation properties satisfy the design specifications. Fourth, the heat load analysis was performed, determining both the static and dynamic heat loads. Last, the test of 55 kA HTSCL was performed to verify some analysis results. The design and analysis of magnet current feeder will provide technical guidance for the design, manufacture and testing of CFETR feeder system in the future.