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Short and long range transport of materials eroded from wall components in fusion devices
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2003 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 313, 311-320 p.Article in journal (Refereed) Published
Abstract [en]

Carbon sources and the sinks have been quantified in TEXTOR and are discussed in terms of short and long range transport. The major source (22 g/h) is the graphite belt limiter, but part (10 g/h) of the carbon is directly re-deposited after short range transport. Long range transport causes flake formation on obstacles and neutralisers, but little and deuterium rich (D/C approximate to 0.7) deposition in remote areas. The rest is leaving via the pumps in gaseous form. This behaviour is different from that in JET where large amounts of deuterium rich deposits were found in the louvers. Tungsten is favoured for the ITER divertors because of its low sputtering yield for hydrogen, but melting and erosion by carbon may be an additional concern. The short range transport of tungsten has been investigated in a well defined experiment and quantitatively re-constructed by means of the ERO-TEXTOR code. Code validation is necessary in order to increase the confidence and the applicability to JET and ITER.

Place, publisher, year, edition, pages
2003. Vol. 313, 311-320 p.
Keyword [en]
plasma-wall interaction, carbon transport balance, tungsten erosion/deposition, hydrogen retention, TEXTOR, ERO-TEXTOR code, hydrocarbon radicals, textor-94, surfaces
Identifiers
URN: urn:nbn:se:kth:diva-22409DOI: 10.1016/S0022-3115(02)01347-8ISI: 000182146700057OAI: oai:DiVA.org:kth-22409DiVA: diva2:341107
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Rubel, Marek J.

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