LAUSR

A model for the plasma evolution during the current quench is presented in this paper: it allows to simulate the evolution of the phenomenon, carry on parametric studies and calculate the heat loads on the tokamak first wall. During the disruption of a tokamak plasma, the current decay rate, the dissipation of the magnetic energy, the repartition of the dissipated energy in different channels, the magnitude of the halo current and the width of the halo region are all functions of the plasma temperature and of the impurity densities. The energy balance equation determines the whole disruption evolution and it must be solved during the current quench, in the close flux surface region and in the halo.