Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 31: Postersitzung II
MM 31.14: Poster
Mittwoch, 16. März 2011, 17:15–18:45, P5
Deuterium trapping in graphite and carbon films growing under irradiation by deuterium plasma — •Vladimir Burlaka1,2, Yuriy Gasparyan2, Aleksandr Pisarev2, Aleksandr Rusinov2, Stepan Krat2, and K. Sugiyama3 — 1University of Goettingen, Germany — 2National Research Nuclear University "MEPhI", Moscow, Russia — 3Max-Planck-Institut für Plasmaphysik, Garching, Germany
Carbon is planned to be used in the divertor of ITER until the tritium phase. Its further use is under discussion for possible high tritium inventory. In the case of graphite or other carbon-based materials, essentially four mechanisms have been identified for the uptake and retention of hydrogen: buildup of a saturated surface layer, chemisorption on inner porosity surface, intergranular diffusion and trapping, and co-deposition of hydrogen with carbon on plasma-exposed surfaces. This work was motivated by the investigation of hydrogen trapping in graphite and co-depositing carbon films growing by the plasma irradiation. A new laboratory plasma device for investigation of plasma surface interaction was constructed. Ion pickup research, surface modification, re-deposition of the sputtered material and combined carbon and hydrogen deposition from the plasma, were performed. Used analysis techniques: thermal desorption spectroscopy (TDS), SEM, AFM and Nuclear reaction analyses (NRA).