Erosion of macrobrush tungsten armor after multiple intense transient events in ITER

The tungsten macrobrushes are foreseen as a perspective ITER divertor armour. Macroscopic erosion by melt motion is the dominating damage mechanism for tungsten armour under high heat loads above 1 MJ/m2 slower than 0.1 ms. In the paper further development of the code MEMOS is presented to describe geometric peculiarities of W-macrobrush armour. The modified code MEMOS is validated against experiments on erosion of W-macrobrush armour in the plasma gun QSPA facility for repetitive plasma loads. A rather good agreement in melt layer erosion was demonstrated. For ITER divertor W-macrobrush armour the results of fluid dynamics simulation of the melt motion erosion under giant ELMs are presented. The heat loads as input for MEMOS for particular single ELM are numerically simulated using the two-dimensional MHD code FOREV.