What is really happening in the wall?

Murata, Isao*; Konno, Chikara  

Charged particles confined in the plasma hurtle to the first wall in fusion reactors. They lose their energy immediately and do not enter the first wall so deeply. On the other hand, many neutrons are produced in the plasma by the fusion reaction. Because neutrons has no charge, they are prone to penetrate the wall. Their energy is high (about 14 MeV) and they can come up to the deeper position of the wall. They arrive to the blanket region rear of the first wall and cause various interactions (nuclear reactions). Here we will explain what is really happening there with neutron reactions and numerical simulation.