Full Paper
Contents  Return  Previous Page  Next Page  Index

Return To: Session FT/P1 - Technology Developments
Prev Page: (FT/P1-14) Performance of a Compact Four-Strap Fast Wave
Next Page: (FT/P1-16) Microscopic Damage of Metals Exposed to the

(FT/P1-15) Impacts of Carbon Impurity in Plasmas on Tungsten First Wall

Y. Ueda1), T. Shimada1), M. Nishikawa1)
1) Osaka University, Suita, Japan

Abstract.  In order to study material mixing effects of carbon and tungsten on plasma material interactions, hydrogen ion beam (containing less than 1 % of carbon ion) irradiation experiments have been made with a steady-state and high-flux ion beam irradiation test device (HiFIT). By irradiation with 1 keV H+3 beam with 0.40 % carbon with the fluence of the order of 1024m- 2, it was clearly observed that quite a lot of blisters with its size up to about 1.0 mm were formed at 653 K. On the other hand, significant blisters were not observed with 0.08 % carbon (other experimental parameters were the same). These small amounts of carbon also increased hydrogen retention in tungsten.

Read the full paper in PDF format.

IAEA 2003