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In-situ measurements of carbon and deuterium deposition using the fast reciprocating probe in TEXTOR

Emmoth, Birger (author)
KTH,Mikroelektronik och Informationsteknik, IMIT
Kreter, A. (author)
Hallén, Anders (author)
KTH,Mikroelektronik och Informationsteknik, IMIT
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Jakubowski, M. (author)
Lehnen, M. (author)
Litnovsky, A. (author)
Petersson, P. (author)
Uppsala universitet,Tandemlaboratoriet
Philipps, V. (author)
Possnert, Göran (author)
Uppsala universitet,Tandemlaboratoriet
Rubel, Marek J. (author)
KTH,Fusionsplasmafysik
Schweer, B. (author)
Sundelin, Per (author)
KTH,Fusionsplasmafysik
Unterberg, B. (author)
Wienhold, P. (author)
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 (creator_code:org_t)
Elsevier BV, 2009
2009
English.
In: Journal of Nuclear Materials. - : Elsevier BV. - 0022-3115 .- 1873-4820. ; 390-91, s. 179-182
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

SCRAPE-OFF PLASMA
FLUXES
COLLECTION
TRANSPORT
TOKAMAK
LAYER; EDGE
Plasma physics
Plasmafysik
Physics

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ref (subject category)
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