Calculation of AC losses in the Central Solenoid of the Divertor Tokamak Torus

This project, realised in collaboration with ENEA Frascati, was aimed at the calculation of the power losses in electrodynamic transient in the Central Solenoid of the Divertor Tokamak Torus (DTT). The DTT machine is a fusion Tokamak machine being built by ENEA, in the location of Frascati, Roma. The power losses are a fundamental parameter for the realisation and the design of the machine. One of the constituents of the DTT is an articulated system of magnets, made up by different components; among these, the most important is the Central Solenoid, whose aim is also to induce a strong current in the Plasma, which generates magnetic field lines in the poloidal direction, which are very important to confine the Plasma itself. The project consisted, firstly, on the creation and validation of the model, by carrying out the calculation of the magnetic field on the axis of the Central Solenoid of the Divertor Tokamak Torus; first, only the contribution of the Central Solenoid was considered, then also, the Poloidal system was taken into account and to conclude, also the Plasma contribution was added. This omputation was performed in an analytical and in a numerical way: the results given by these two methodologies were compared and the trends totally coincided. Also, the values obtained were completely confirmed by the ones computed by ENEA. Once the model was validated, we proceeded by performing the calculation of the losses in electrodynamic transient: an analytical model which calculates the coupling and hysteresis losses in the Central Solenoid of the Divertor Tokamak Torus was developed. Moreover, the trends of these losses throughout the time and their distributions in the Central Solenoid’s modules were found.