Speaker
Description
This work provides an overview of the progress achieved so far in the electromagnetic simulation of plasma instability phenomena in tokamaks, focusing on the Divertor Tokamak Test (DTT). The main aim is to provide a concise summary of the current strategies for disruption mitigation, focusing on Shattered Pellet Injection (SPI), seen as the primary disruption mitigation method during the full-power operation of the machine.
Experience gained in recent years has shown that vertical displacement events represent one of the most critical challenges for the integrity of internal components, due to the sudden release of thermal and electromagnetic energy they involve. These conditions induce eddy currents and localized loads on passive structures, potentially compromising machine components, if not properly controlled. Numerical studies indicate that with SPI technology, the electromagnetic effects acting on surrounding components can be reduced.
The development of new sets of mitigated disruption scenarios, using the MAXFEA code, forms part of a broader effort to evaluate how mitigation approaches may enhance operational safety. This comparative analysis also highlights the importance of improving the technologies used for the production and delivery of cryogenic pellet, as their performance is crucial for radiating a large fraction of the plasma energy before it reaches the first wall and for achieving effective load reduction.
Overall, this work serves as a synthetic contribution that brings together recent advances in disruption simulations and disruption mitigation system design carried out for DTT.
