Fuel removal from plasma-facing components by oxidation-assisted technique: An overview of surface morphology after oxidation
2007 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 363-365, 877-881 p.Article in journal (Refereed) Published
Oxygen-assistedfuelremoval is reported for laboratory-prepared a-C:D films and for layers obtained by boronisation in a tokamak and then exposed to a helium–oxygen glow discharge in TEXTOR. Oxidation of thick mixed-material co-deposits under laboratory conditions is also presented. The essential results are following: (i) laboratory-prepared amorphous deuterated carbon (a-C:D) layers are decomposed efficiently by the He–O2 glow: D and C contents are decreased by a factor of 45–220 and 25–60, respectively; (ii) the same treatment of the boronised films leads to the release of D but no removal of carbon is observed; (iii) the thermal oxidation (at 300 °C in air under laboratory conditions) of co-deposits on PFC and probes exposed to the SOL reduces the D content by a factor of 4–5 after 2 h, whereas nearly complete fuelremoval (98%) occurs after 10 h at 300 °C. The study shows that the fuelremoval efficiency is dependent on the overall composition of the mixed layer. It is high from pure a-C:D films but distinctly less efficient from real co-deposits.
Place, publisher, year, edition, pages
Elsevier, 2007. Vol. 363-365, 877-881 p.
Deuterium inventory, Retention, Surface analysis, Co-deposition, TEXTOR
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-68815DOI: 10.1016/j.jnucmat.2007.01.107ISI: 000247657200154ScopusID: 2-s2.0-34249049480OAI: oai:DiVA.org:kth-68815DiVA: diva2:485350
Qc 201202072012-02-072012-01-282013-11-19Bibliographically approved