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Deep deuterium retention and Be/W mixing at tungsten coated surfaces in the JET divertorBergsaker, H. ...Surface samples from a full poloidal set of divertor tiles exposed in JET through operations 2010-2012 with ITER-like wall have been investigated using SEM, SIMS, ICP-AES analysis and micro beam ... nuclear reaction analysis (mu-NRA). Deposition of Be and retention of D is microscopically inhomogeneous. With careful overlaying of mu-NRA elemental maps with SEM images, it is possible to separate surface roughness effects from depth profiles at microscopically flat surface regions, without pits. With (He-3, p) mu-NRA at 3-5 MeV beam energy the accessible depth for D analysis in W is about 9 mu m, sufficient to access the W/Mo and Mo/W interfaces in the coatings and beyond, while for Be in W it is about 6 mu m. In these conditions, at all plasma wetted surfaces, D was found throughout the whole accessible depth at concentrations in the range 0.2-0.7 at% in W. Deuterium was found to be preferentially trapped at the W/Mo and Mo/W interfaces. Comparison is made with SIMS profiling, which also shows significant D trapping at the W/Mo interface. Mixing of Be and W occurs mainly in deposited layers.Source: Proceedings (No. 014061, Vol. T167, 2016, Str. 1-9)Type of material - conference contributionPublish date - 2016Language - englishCOBISS.SI-ID - 31562279
Author
Bergsaker, H. |
Bykov, I. P. |
Zhou, Y. |
Petersson, P. |
Possnert, Göran |
Likonen, J. |
Koivuranta, S. |
Čufar, Aljaž |
Drenik, Aleksander, 1979- |
Kos, Bor, 1989- |
Kodeli, Ivan Aleksander |
Lengar, Igor |
Snoj, Luka, 1981-
Topics
jedrska fizika |
berilij |
devterij
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Bergsaker, H. | ![]() |
Bykov, I. P. | ![]() |
Zhou, Y. | ![]() |
Petersson, P. | ![]() |
Possnert, Göran | ![]() |
Likonen, J. | ![]() |
Koivuranta, S. | ![]() |
Čufar, Aljaž | 36329 |
Drenik, Aleksander, 1979- | 26476 |
Kos, Bor, 1989- | 38202 |
Kodeli, Ivan Aleksander | 03943 |
Lengar, Igor | 19167 |
Snoj, Luka, 1981- | 27819 |
Source: Personal bibliographies
and: SICRIS
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