Simulation calculations of mutual contamination between tungsten and carbon and its impact on plasma surface interactions

Ohya, K. (author)

Kawakami, R. (author)

Tanabe, T. (author)

Wada, M. (author)

Ohgo, T. (author)

Philipps, V. (author)

Pospieszczyk, A. (author)

Huber, A. (author)

Sergienko, G. (author)

Noda, N. (author)

(creator_code:org_t)

2001
2001
English.
In: Journal of Nuclear Materials. - 0022-3115 .- 1873-4820. ; 290, s. 303-307

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

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.

By the author/editor: Ohya, K.; Kawakami, R.; Tanabe, T.; Wada, M.; Ohgo, T.; Philipps, V.; show more...; Pospieszczyk, A.; Huber, A.; Rubel, Marek J.; Sergienko, G.; Noda, N.; show less...

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