Abstract
The HL-2A tokamak will be modified into HL-2M. The Bt at the plasma center (major radius R=1.78m) is 2.2T, the minor radius is 0.65m. The plasma current IP of HL-2M will reach up to 2.5MA, the elongation and triangularity is more than 1.8 and more than 0.5, respectively. The vacuum vessel torus consists of 20 sectors with “D” shaped cross-section and double wall structure. 20 toroidal field coil bundles comprise 140 turns which are designed with demountable joints, the poloidal field coils system consists of 25 coils. The engineering design and calculation for field coil system, vacuum vessel, support structure, etc. are finished, many key issues for manufacture process have been discussed with industry and the fabrication of main components of HL-2M tokamak will be carried out in factories.
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