A global structural and electromagnetic Fe model for the prediction of the mechanical behavior of the JT-60SA superconducting magnet system

The JT-60SA is a fusion experiment designed to contribute to the early realization of fusion energy by addressing key physics issues for ITER and by investigating how best to optimize the operation of the fusion power plants. perconducting magnet system of JT-60SA consists of three sub-systems: a Central Solenoid split in four segments, a set of six Equilibrium Field coils and a set of eighteen Toroidal Field coils. Such systems are connected each other by means of a series of flexible and kinematic mechanical attachments, with the Toroidal Field magnet acting as the backbone of the whole magnet system. iled finite element model, representing a 40 degrees sector of the superconducting magnet system of JT-60SA, has been developed and a complete set of analyses were carried out to obtain the distribution of magnetic forces acting on the three magnet sub-systems, to predict the corresponding deformations, to estimate the stress levels in the magnets’ mechanical structures and to verify the integrity of the system and its fatigue life, in agreement with the applicable Codes and Standards and in consideration of the expected lifespan of the machine. aper illustrates the details of the modeling strategy which lead to the production of the finite element model and provides a comprehensive report and a critical analysis of the most relevant results obtained in the calculations carried out so far.