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Simulation study of carbon and tungsten deposition on W/C twin test limiter in TEXTOR-94
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2000 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 283, 1182-1186 p.Article in journal (Refereed) Published
Abstract [en]

In order to investigate the impurity release and surface modification on a W/C twin test limiter, made of a half of W and the other half of C, exposed to the edge plasma of TEXTOR-94, simulation calculations of ion-surface interaction are conducted by a Monte Carlo code. According to the calculations, experimentally observed spatial distributions of WI and CII line intensities around the W side of the limiter can be explained by physical sputtering of W, reflection of bombarding C ions and physical sputtering of implanted C. The CII line emission, resulting from thermal C atoms, around the C side of the limiter is suppressed by deposition of W, and the reflection of C ions from W deposited on C causes the CII intensity to decay more slowly than that from C without the deposition. Bombardment with deuterium edge plasmas, containing impurity W, produces a thick W layer on the C side of the limiter, whereas C implanted in the W side is strongly sputtered due to impact of most constituent D ions.

Place, publisher, year, edition, pages
2000. Vol. 283, 1182-1186 p.
Keyword [en]
edge plasmas, molybdenum, release
URN: urn:nbn:se:kth:diva-20230DOI: 10.1016/S0022-3115(00)00172-0ISI: 000165877800092OAI: diva2:338923
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Rubel, Marek J.
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Alfvén Laboratory
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