Simulation calculations of mutual contamination between tungsten and carbon and its impact on plasma surface interactions
2001 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 290, 303-307 p.Article in journal (Refereed) Published
Mutual contamination between C and W, resulting from the simultaneous use of these materials as plasma facing components, is simulated by means of a computer simulation code, Erosion and Deposition based on Dynamic model (EDDY). W deposition on C rapidly increases the reflection coefficient for D and C impurity. In comparison between the calculation and a C-W twin test limiter experiment in TEXTOR-94, C release from the C side of the limiter is dominated by reflection of C impurity from the W deposits, in addition to physical sputtering of C; chemical erosion is strongly suppressed. Due to the dynamic effect which makes C-W mixed layer, C deposition on W gradually changes the reflection coefficient and sputter yields. Formation of a sharp boundary between erosion and C deposition zones on the W side of the limiter is well reproduced by simulation. Local redeposition patterns of C and W on the limiter surface are also calculated.
Place, publisher, year, edition, pages
2001. Vol. 290, 303-307 p.
plasma-material interaction, tungsten, carbon, erosion, deposition, modelling
IdentifiersURN: urn:nbn:se:kth:diva-20469DOI: 10.1016/S0022-3115(00)00632-2ISI: 000167676700061OAI: oai:DiVA.org:kth-20469DiVA: diva2:339164
QC 201005252010-08-102010-08-10Bibliographically approved