An Analysis of Disruption Events in ASDEX-Upgrade through 3-D Eddy Current Simulation

In this paper we present the results of simulations of plasma disruption events in ASDEX-Upgrade performed using a 3-D eddy current code developed for the electromagnetic analysis of next step fusion experiments. Inputs for the simulations were taken both from experimental observations of plasma current quench in the machine as well as from the original specifications used for the design of the ASDEX-Upgrade vacuum vessel. The results of the calculations have been compared with the available experimental measurements: both integral parameters such as induced currents and loop voltages and local characteristics, such as the magnetic field distribution, have been considered, in order to demonstrate the adequateness of the calculation method and model set up. The results of the analysis of the design disruption have been compared with previous work and have been used to predict resultant forces on part of the ASDEX mechanical structures.