کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10645115 | 999835 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
ELM flushing and impurity transport in the H-mode edge barrier in ASDEX Upgrade
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Density profiles of He2+, C6+, Ne10+ and Ar16+ are measured at ASDEX Upgrade with high temporal (1.9Â ms) and radial resolution (>3Â mm) using CXRS. This allows the transport coefficients at the edge transport barrier to be analyzed in between type-I ELMs during H-mode. All measurements resemble the neoclassical transport coefficients, which means that the diffusion coefficient ranges from 0.15 to 0.35Â m2/s and the maximum of the inward convection velocity is Z-dependent increasing from 15Â m/s (He2+) to 90Â m/s (Ar16+). These results are combined into a simplified transport-erosion model for W which calculates the neoclassical transport coefficients self-consistently while taking several impurity species into account. The model also calculates erosion fluxes at the wall, prompt re-deposition of W and loss terms due to parallel flows in the scrape-off layer. While several free parameters exist in the model, it demonstrates that a quantitative consistency between the measured erosion fluxes of W and the observed W concentration inside the plasma is obtainable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 415, Issue 1, Supplement, 1 August 2011, Pages S334-S339
Journal: Journal of Nuclear Materials - Volume 415, Issue 1, Supplement, 1 August 2011, Pages S334-S339
نویسندگان
T. Pütterich, R. Dux, M.A. Janzer, R.M. McDermott, ASDEX Upgrade Team ASDEX Upgrade Team,