Surface modification and sputtering erosion of reduced activation ferritic martensitic steel F82H exposed to low-energy, high flux deuterium plasma

摘要

Highlights ? Exposure of F82H steel targets with low-energy D plasma leads to formation of micro-structured layers on the target surfaces. ? The surface morphology of the targets depends strongly on the exposure temperature. ? The erosion yield of the F82H steel is increased by a factor of about two as the exposure temperature rises from 403 to 773 K. Abstract Targets prepared from Reduced Activation Ferritic Martensitic (RAFM) steel F82H were exposed to low-energy (200 eV) deuterium (D) plasma at various temperatures with highfluxes of about 10 22 D/m 2 s to various fluences in the range from 10 25 to 2.5 × 10 26 D/m 2 . Under the plasma exposure, micro-structured layers are formed on the target surfaces, and the surface morphology is dependent on the exposure temperature. The erosion yield of the F82H samples increases by a factor of about two as the exposure temperature rises in the range from 403 to 773 K.