RESEARCH ON PLASMA-FACING COMPONENT MATERIALS

An irradiation target chamber with rotatable table and cooling systems and a set of quadrupole magnetic lenses associated with the 14 MeV, s hort-pulse electron linear accelerator was used to irradiate high heat flux materials. The electron gamma shower simulation code (EGS4) was modified to calculate the displacement atom concentration, deposited e nergy density and damage dose with 14 MeV electron irradiation. The Si C/SiC composite specimens prepared by CVI using ethyl-trichloro-silane (ETS) as SiC source and SiC fiber is Nicalon NL-200, were irradiated with a cyclic 14 MeV electron beam. The thermal diffusivity and resist ance of specimens were measured before and after irradiation as a func tion of temperature.