TY  - JOUR
AU  - Buzi, L.
AU  - De Temmerman, G.
AU  - Matveev, D.
AU  - Reinhart, M.
AU  - Schwarz-Selinger, T.
AU  - Rasinski, M.
AU  - Unterberg, B.
AU  - Linsmeier, Ch.
AU  - Van Oost, G.
TI  - Surface modifications and deuterium retention in polycrystalline and single crystal tungsten as a function of particle flux and temperature
JO  - Journal of nuclear materials
VL  - 495
SN  - 0022-3115
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2017-06850
SP  - 211 - 219
PY  - 2017
AB  - The effects of particle flux and exposure temperature on surface modifications and deuterium (D) retention were systematically investigated on four different tungsten (W) microstructures. As-received, recrystallized, and single crystal W samples were exposed to D plasmas at surface temperatures of 530–1170 K. Two different ranges of D ion fluxes (1022 and 1024 D+m−2s−1) were used with the ion energy of 40 eV and particle fluence of 1026 D+m−2. Increasing the particle flux by two orders of magnitude caused blister formation and D retention even at temperatures above 700 K. The main effect of increasing the particle flux on total D retention was the shifting of temperature at which the retention was maximal towards higher temperatures. Diffusion-trapping simulations were used to fit the thermal desorption spectroscopy (TDS) release peaks of D, yielding one or two types of trapping sites with de-trapping energies around 2 eV
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000413594400025
DO  - DOI:10.1016/j.jnucmat.2017.08.026
UR  - https://juser.fz-juelich.de/record/838176
ER  -