Design of the Precompression Mechanism and Gravity Support for the Central Solenoid Assembly in the JT-60SA Tokamak

The precompression mechanism is a key issue for central solenoid (CS) support structure. The support structure of CS assembly should act a role of withstanding the strong electromagnetic forces. The gap is not allowed between CS modules and the support structure due to the difference of their thermal expansion coefficients after cool down. The support structure should also have the precompression mechanism to cancel this gap. The support structure for CS assembly is designed considering the real procedure to set the precompression mechanism and load the required compression.