This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2004.04.183 in citations.
Modeling of Erosion and Deposition Patterns on CW und WTa Twin Limiters Exposed to the TEXTOR Edge Plasmas
Modeling of Erosion and Deposition Patterns on CW und WTa Twin Limiters Exposed to the TEXTOR Edge Plasmas
The erosion and deposition patterns on tungsten and tantalum test limiters exposed to the TEXTOR deuterium plasma containing a small amount of C impurity are simulated with the modified EDDY code. At the very top of the W and Ta limiters, there occurs neither erosion nor deposition, but the erosion...
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Personal Name(s): | Ohya, K. |
---|---|
Tanabe, T. / Rubel, M. / Wada, M. / Ohgo, T. / Hirai, T. / Philipps, A. / Kirchner, A. / Pospieszczyk, A. / Huber, A. / Sergienko, G. / Breszinek, S. / Noda, N. | |
Contributing Institute: |
Werkstoffstruktur und Eigenschaften; IWV-2 Institut für Plasmaphysik; IPP |
Published in: | Journal of nuclear materials, 329-333 (2004) S. 732 - 736 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2004
|
Physical Description: |
732 - 736 |
DOI: |
10.1016/j.jnucmat.2004.04.183 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Journal of Nuclear Materials
329-333 |
Subject (ZB): | |
Publikationsportal JuSER |
The erosion and deposition patterns on tungsten and tantalum test limiters exposed to the TEXTOR deuterium plasma containing a small amount of C impurity are simulated with the modified EDDY code. At the very top of the W and Ta limiters, there occurs neither erosion nor deposition, but the erosion proceeds slowly along the surface. When approaching the edge, the surface is covered by a thick C layer, which shows a very sharp boundary similar to the observation in surface measurements. In the erosion zone, the re-deposited carbon forms a W (Ta)-C mixed layer with small C concentration. Assumptions for chemical erosion yields of similar to0.01 for W and <0.005 for Ta fit the calculated widths of the deposition zone to the experimentally determined values. Possible reasons for the difference between W and Ta are discussed. (C) 2004 Elsevier B.V. All rights reserved. |