%0 Journal Article
%A Buzi, L.
%A De Temmerman, G.
%A Matveev, D.
%A Reinhart, M.
%A Schwarz-Selinger, T.
%A Rasinski, M.
%A Unterberg, B.
%A Linsmeier, Ch.
%A Van Oost, G.
%T Surface modifications and deuterium retention in polycrystalline and single crystal tungsten as a function of particle flux and temperature
%J Journal of nuclear materials
%V 495
%@ 0022-3115
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2017-06850
%P 211 - 219
%D 2017
%X 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
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000413594400025
%R 10.1016/j.jnucmat.2017.08.026
%U https://juser.fz-juelich.de/record/838176