Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster Session II
P 17.39: Poster
Mittwoch, 2. April 2025, 16:15–18:15, ZHG Foyer 1. OG
In-situ Uptake Measurement and Modelling of Deuterium Atoms in Self Damaged Tungsten at Different Temperatures — •Abdulrahman Albarodi, Thomas Schwarz-Selinger, and Mikhail Zibrov — Max-Planck-Institute for Plasma Physics, Garching bei München
Self-damaged tungsten samples (damage dose 0.23 dpa) were exposed to low energy deuterium (D) atoms (< 5 eV) at 400, 500 and 600 K to investigate D uptake and D retention at different temperatures. The time evolution of the D depth profile was observed in-situ with 3He nuclear reaction analysis at different uptake times. Thermal desorption spectroscopy was performed ex-situ to determine the bulk and surface model parameters. A modified surface coverage-dependent model was used to describe the results and extended to lower temperatures in the tungsten samples. The extended model was implemented in TESSIM hydrogen transport simulations. Effects of grain boundary diffusion on D depth profile evolution were also investigated by comparison with results from a D atom exposure experiment on a tungsten single crystal at 500 K.
Keywords: tungsten; atom uptake