Abstract
We present Plasma Surface Dynamics with Ion Beam Analysis (PS-DIBA), a device that makes it possible to carry out in-situ ion beam analysis of deuterium retention under high-density plasma irradiation, relevant to divertor plasma conditions. The device is equipped with a newly developed novel dc plasma source, which can generate high-density plasma (>1018 m−3) with an electron temperature of around 5 eV in steady state. The dynamic behavior of deuterium retention in ITER R&D tungsten exposed to deuterium plasma was observed by using nuclear reaction analysis in PS-DIBA. The results indicate that deuterium retention strongly depends on the surface temperature of the tungsten sample during plasma exposure. After plasma termination, the retained deuterium in tungsten decreases faster than in isotropic graphite.
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