Test of divertor materials under simulated plasma disruption conditions at the SOM electron beam facility

The SOM electron beam facility at the Efremov Institute at St. Petersburg was used for exploratory plasma stream target experiments under conditions aiming the thermal quench phase of ITER tokamak plasma disruptions. For carbon erosion starts after reaching a threshold energy density value of 1 MJ/m2. Modeling was done with a radiation hydrodynamic code in one dimensional planar geometry. The modeling results in terms of vapor shield formation, target plasma temperature and erosion are in good agreement with the experimental results. Vapor shield formation is negligible. The erosion is mainly determined by the power density of the unattenuated beam. (orig.)