Abstract
China Fusion Engineering Test Reactor (CFETR) superconducting tokamak is a national scientific research project of China with major and minor radius is 5.7m and 1.6m respectively. The magnetic field at the center of plasma with radius as R=5.7m is set to be 5.0T. The major objective of the project is to build a fusion engineering tokamak reactor with fusion power in the range of 50–200MW and should be self-sufficient by blanket. Six central solenoid coils of CFETR with same structure are made of Nb3Sn superconductor. Besides, the stray field in plasma area should be less than 20Gs with the operation current of CS coils for plasma heating phase. The maximum magnetic field of CS coil is 11.9T. It is calculated by the coils’ operation current based on plasma equilibrium configuration. The central solenoid needs to have enough stability margin under the condition of high magnetic field and strain. This paper discusses the design parameters, electromagnetic distribution, structure and stability analysis of the CS superconducting magnet for CFETR.
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