抄録
To investigate the fundamental effects of the helium irradiation on metallic materials, transmission electron microscope (TEM) observation, surface observation using scanning probe microscope (SPM), and hardness measurements of the damaged region were carried out. Effects of pre-irradiation of helium ions on trapping of injected deuterium have also been examined. Several important experiment findings are briefly explained. These results emphasized that the formation of helium bubbles is a critical factor in understanding the plasma-surface interaction in fusion reactors.
