Plasma Disruption Simulation Clausole campione

Plasma Disruption Simulation. Due to the strong mutual coupling, a plasma disruption could cause a significant current variation in the passive elements and in the poloidal coils. In such a situation, it is not easy to identify which are the parameters that have a real impact on the level of induced over-currents on the external coils, so a set of simulations has been performed using the developed model and changing the plasma disruption parameters such as plasma initial current value, plasma position, plasma current distribution and derivative. During plasma disruption the converters feeding the CS and EF coils can contribute to limit the coil over-current, but it is possible that in some fault conditions they are by-passed. In order to take into account this realistic worst case in the performed simulations, the converters have been considered supplying zero voltage. Since Eq. (2.3) represents a linear system, the maximum overcurrent in the coils occurs at the maximum plasma current; therefore the case of 5.5 MA was considered in the simulation. 3.1 Fixed position, 10ms plasma disruption