In-situ measurements of carbon and deuterium deposition using the fast reciprocating probe in TEXTOR
2009 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 390-91, no 1, 179-182 p.Article in journal (Refereed) Published
Silicon samples were exposed in the scrape-off layer of the TEXTOR plasma using a fast reciprocating probe, with the aim of studying carbon deposition and deuterium retention during Dynamic Ergodic Divertor (DED) operation. Separate samples were exposed for 300 ms at the flat-top phase of neutral beam heated discharges. The exposure conditions were varied on a shot-to-shot basis by external magnetic perturbations generated by the DED in the m/n = 3/1, DC regime, base configuration. Nuclear Reaction Analysis (NRA) was used to characterise collector sample surfaces after their exposure. Enhanced concentrations of both carbon and deuterium (C 3-10 x 10(16) at./cm(2), D 8-60 x 10(15) at./cm(2)) were found. The D/C ratio was less than unity which indicates that most of the carbon and deuterium were co-deposited. Carbon e-folding lengths of about 2 cm were found on both toroidal sides of the probe independent of DED perturbations.
Place, publisher, year, edition, pages
2009. Vol. 390-91, no 1, 179-182 p.
IdentifiersURN: urn:nbn:se:uu:diva-148867DOI: 10.1016/j.jnucmat.2009.01.162ISI: 000267747300041OAI: oai:DiVA.org:uu-148867DiVA: diva2:403146