Abstract
A new apparatus for rapid and precise measurement of very small surface area with high energetic particle irradiation has been developed for the purpose of “in situ” examination in connection with a torus plasma device(JIPPT-II at Nagoya University, Japan). The minimum detectable surface area by xenon adsorption at liquid nitrogen temperature was less than 2cm 2 within the reproducibility in the determination estimated to be 5% or less. This apparatus was applied to the surfaces of type 304 stainless steel(304SS), pyrolytic carbon and SiC-coated carbon with the irradiation of D +, He + and Ar + ions. The roughness factor of 304SS increased greatly with the Ar + irradiation from 1.37 to 7.65. The roughness factor of the pyrolytic carbon surface decreased with the irradiation of D +, He + as well as Ar + from 1 3 to 1 5 . The roughness factor of SiC surface coated onto carbon at 1000°C was observed to be 21 – 23 and was not changed by the irradiation.
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