%0 Journal Article
%A Zibrov, M. S.
%A Baldwin, M. J.
%A Mayer, M.
%A Nguyen, H. Q.
%A Brezinsek, S.
%A Doerner, R. P.
%T Deuterium retention in mixed Be-W-D codeposited layers
%J Nuclear fusion
%V 60
%N 12
%@ 0029-5515
%C Vienna
%I IAEA
%M FZJ-2022-04020
%P 126005 -
%D 2020
%X Mixed beryllium-tungsten-deuterium (Be-W-D) layers (4.4–28.4 at.% W) were codeposited in a magnetron discharge in D2-Ar atmosphere at pressures of 0.8 Pa, 2.7 Pa, and 8 Pa and a substrate temperature of 373 ± 15 K. The composition of the layers was determined using nuclear reaction analysis and Rutherford backscattering spectrometry. D trapping states in the layers were examined using thermal desorption spectroscopy. At all pressures used, the D concentration in the layers has a non-monotonic dependence on the W concentration, with the maximum occurring at 4.4–7.3% W. In this case, the D concentration is about two times greater than that in a Be-D layer; in W-D layers the D concentration is more than one order of magnitude smaller. Increase of pressure during deposition results in an increase of the D concentration in Be-D and Be-W-D (4.4–7.3% W) layers and is linked with the appearance of sharp low-temperature D release peaks near 450 K and 500 K. Increase of pressure also results in steeper decrease of the D concentration with increasing W concentration beyond 7.3%. It is concluded that for the layers deposited at 450 K and above, the effect of the presence of W (4.4–28.4%) on the D retention becomes small.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000575504400001
%R 10.1088/1741-4326/abae83
%U https://juser.fz-juelich.de/record/910647