How hot does the wall get?

Maki, Koichi*; Konno, Chikara  

Neutrons produced by the fusion reaction generate secondary neutrons and -rays through interaction with materials of divertor, first wall and blanket. Target nuclei are recoiled by the interaction with these neutrons. At the micro level the recoiled nuclei disarray lattice arrangement and cause material damage if the recoil energy is larger than constraint energy of lattice. Here we will explain how the nuclear interactions change to heat and make radiation damage to materials.