  Runaway electron incidence on plasma facing components triggers explosive
events that are accompanied by the expulsion of fast solid debris. Subsequent
dust-wall high speed impacts constitute a mechanism of wall damage and dust
destruction. Empirical damage laws that can be employed for erosion estimates
are based on room-temperature impact experiments. We use light-gas gun shooting
systems to accelerate solid tungsten dust to near-supersonic speeds towards
bulk tungsten targets that are maintained at different temperatures. This
concerns targets cooled down to $-100^{\circ}$C with liquid nitrogen and
targets resistively heated up to $400^{\circ}$C. Post-mortem surface analysis
reveals that the three erosion regimes (plastic deformation, bonding, partial
disintegration) weakly depend on the target temperature within the investigated
range. It is concluded that empirical damage laws based on room-temperature
measurements can be safely employed for predictions.
