Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
P: Fachverband Plasmaphysik
P 17: Plasma Wall Interaction II
P 17.2: Vortrag
Donnerstag, 19. März 2026, 16:45–17:10, KH 02.016
Influence of the presence of deuterium on damage evolution in tungsten — •Zeqing Shen1,2, Thomas Schwarz-Selinger2, Mikhail Zibrov2, Armin Manhard2, and Martin Balden2 — 1Technische Universität München, 85747 Garching, Germany — 2Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
A systematic investigation was conducted to examine the effects of ion flux during deuterium (D) exposure of self-ion-damaged tungsten (W). The samples were heated to four temperatures within the range of 470--770 K during the plasma loading process. Two plasma conditions were applied during annealing: a low flux of 6e19 D/m2/s and a high flux of 5e20 D/m2/s, both using an ion energy of 5 eV/D. For comparison, annealing experiments were also carried out in vacuum. The depth distribution of deuterium was determined by 3He nuclear reaction analysis (NRA), while its total inventory was evaluated using both NRA and thermal desorption spectroscopy (TDS). Morphological modifications at the surface were analysed by confocal laser scanning microscopy (CLSM). For the flux condition of 6e19 D/m2/s, the results revealed a decrease in deuterium retention with increasing annealing temperature for both plasma annealing and vacuum annealing. The presence of D during annealing has only a small stabilizing effect on the defects. In contrast, exposure to a higher flux of 5e20 D/m2/s induces additional damage, producing micrometer-wide blisters only a few tens of nanometers high.
Keywords: Defect evolution; Deuterium retention; Annealing