Hydrogen isotope retention in B/sub 4/C coating on RGT graphite under high heat fluxes of DIII-D divertor plasma

The results of the investigation of retention and thermal desorption of hydrogen isotopes of B/sub 4/C coated RGT (a recrystallized graphite with high thermal conductivity, 600 W/mK) after the exposure to high heat flux in the divertor strike point region of DIII-D using the DIMES sample exchange system are reported. It is shown that the material is very promising for plasma facing elements of tokamaks.