Studies on the transmutation-induced alpha and proton particles caused by fusion-neutron

The yield, gas production rates, He/dpa ratio, spectral distribution and DPA (Displacement per Atom) of transmutation-induced Alpha and Proton particles were calculated for the fusion reactor's structure materials (316S.S., SiC, Graphite and included elements in them). The electronic energy loss of transmutation-induced Alpha particle in 316S.S. is also calculated. The calculated results show that the DPA is very small caused by them, but the synergistic action of high-energy cascades and helium should influence seriously the radiation-induced swelling, with large electronic energy loss about 10 keV/nm. The effect of the electronic energy loss on material's properties is considerable. The spectral distribution depends mainly on reaction energy and atomic weight of target elements. The more reaction energy and atomic weight of target element are, the higher energy of transmutation-induced Alpha and Proton particles are. Their spectral distributions localized much about 9-14 MeV for the materials containing heavy nuclide. In the materials containing light nuclide the spectral distribution are localized much about 1-9 MeV for Alpha. The projected poloidal angle distribution is much about 80 degree-100 degree for materials containing heavy nuclide and 70 degree-110 degree for Graphite, material containing light nuclide. The calculated results provided parameter-basis for simulation of irradiated damage by high energy-neutrons used ions beam irradiation