On January 11, 2024, the 12 toroidal field (TF) magnets of the Honghuang 70 high-temperature superconducting tokamak device were successfully assembled into a ring with the vacuum vessel and the inner cryogenic shield.
The formation of the TF magnets into a ring is a significant milestone in the overall assembly process of Honghuang 70. The 12 TF magnets of the Honghuang 70 are assembled outside the vacuum vessel, forming the toroidal magnetic field that confines the plasma. The vacuum vessel is assembled inside the TF magnets and serves as the toroidal “reaction vessel” that contains the high-temperature plasma. The inner cryogenic shield is assembled between the vacuum vessel and the TF magnets, providing a thermal barrier to protect the superconducting magnets from the influence of high-temperature components such as the vacuum vessel.
