Carbon deposition and fuel accumulation in a castellated limiter exposed under erosion-dominated conditions in the SOL of TEXTOR
2005 (English)In: 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets: Europhysics Conference Abstracts, 2005, 361-364 p.Conference paper (Refereed)
Castellated limiter with ITER-like geometry was exposed under the erosion-dominated conditions in the SOL of TEXTOR. After the exposure, deposits were found in the gaps, with a negligible amount of deposited material that was detected on top surfaces open to the plasma. The thickest deposits are located on plasma shadowed sides of the gaps with maximum thickness up to 0.5 μm on the plasma closest locations as it was measured with SIMS diagnostic. The deposit thickness decrease exponentially with the depth of gaps with e-folding length of 1.7-2 mm as inferred from EPMA measurements. Material intermixing was found to occur in the deposited layers. Deposits are mixed Mo:C:D:O:B:H layers. Gaps contain at least (5÷10)×1016 of D fuel atoms per cm2. This corresponds roughly to 0.02÷0.04 % of total averaged D fluence impinging on the castellation.
Place, publisher, year, edition, pages
2005. 361-364 p.
, Europhysics Conference Abstracts, Vol. 1
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-148530ScopusID: 2-s2.0-84873328348ISBN: 978-162276332-0OAI: oai:DiVA.org:kth-148530DiVA: diva2:738925
32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets; Tarragona, Spain, 27 June - 1 July, 2005
QC 201408192014-08-192014-08-082014-08-19Bibliographically approved