Beryllium was chosen as a plasma-facing material (PFM) for the first wall in an international thermonuclear experimental reactor (ITER). In this study, the deuterium and helium retention behavior in Be and the associated microstructure evolution were investigated using thermal desorption spectroscopy (TDS) and transmission electron microscopy (TEM). Since the disappearance of bubbles was observed at desorption peak temperatures of about 773 K for deuterium and 973 K for helium, these desorption peaks could be attributed to the release from each bubble. The existence of deuterium or helium within each bubble was also clearly confirmed using electron energy-loss spectroscopy (EELS) combined with scanning transmission electron microscopy (STEM). There was a clear difference between the disappearance process of the deuterium and helium bubbles. While the deuterium bubble gradually shrunk and disappeared, the helium bubble instantly vanishes. The results showed that the stability of helium bubbles was higher than that of deuterium bubbles.

在国际热核实验反应器（ITER）中，铍被选作面向等离子体的材料（PFM）作为第一道壁。在这项研究中，使用热脱附光谱（TDS）和透射电子显微镜（TEM）研究了Be中的氘和氦保留行为以及相关的微观结构演变。由于在氘的约773 K和氦的约973 K的解吸峰温度下观察到气泡消失，这些解吸峰可归因于每个气泡的释放。使用电子能量损失谱（EELS）结合扫描透射电子显微镜（STEM）也可以清楚地确认每个气泡中都存在氘或氦。氘和氦气气泡的消失过程之间存在明显差异。当氘泡逐渐收缩并消失时，氦泡立即消失。结果表明，氦气泡的稳定性高于氘气泡。