In ITER. the helium (He) impurity produced by the deuterium-tritium reaction will bombard the tungsten (W) divertor armor at the strike points. Consequently. strong interaction occurs therein that both impact the performance of the plasmas and the lifetime of the divertor. https://www.bekindtopets.com/hot-mega-Swish-Supreme-Glide-Track-White-great-pick/