ERO modelling of local deposition of injected 13C tracer at the outer divertor of JET

被引：7

作者：

Airila, M. I. ^{[1
]}

Aho-Mantila, L. ^{[2
]}

Brezinsek, S. ^{[3
]}

Coad, J. P.

Kirschner, A. ^{[3
]}

Likonen, J. ^{[1
]}

Matveev, D. ^{[3
]}

Rubel, M. ^{[4
]}

Strachan, J. D. ^{[5
]}

Widdowson, A.

Wiesen, S. ^{[3
]}

机构：

[1] VTT Tech Res Ctr Finland, Assoc Euratom Tekes, Espoo 02044, Finland

[2] TKK Helsinki Univ Technol, Assoc Euratom Tekes, Helsinki, Finland

[3] Forschungszentrum Julich, Assoc Euratom FZJ, Inst Energieforsch Plasmaphys, Trilateral Euregio Cluster, Julich, Germany

[4] Royal Inst Technol, Assoc Euratom VR, Alfven Lab, Stockholm, Sweden

[5] Princeton Univ, PPPL, Princeton, NJ 08544 USA

[6] JET EFDA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

PHYSICA SCRIPTA | 2009年 / T138卷

基金：

英国工程与自然科学研究理事会;

关键词：

SCRAPE-OFF LAYER; TRANSPORT; EROSION; CARBON;

D O I：

10.1088/0031-8949/2009/T138/014021

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The 2004 tracer experiment of JET with the injection of (CH4)-C-13 into H-mode plasma at the outer divertor has been modelled with the Monte Carlo impurity transport code ERO. EDGE2D solutions for inter-ELM and ELM-peak phases were used as plasma backgrounds. Local two-dimensional (2D) deposition patterns at the vertical outer divertor target plate were obtained for comparison with post-mortem surface analyses. ERO also provides emission profiles for comparison with radially resolved spectroscopic measurements. Modelling indicates that enhanced re-erosion of deposited carbon layers is essential in explaining the amount of local deposition. Assuming negligible effective sticking of hydrocarbons, the measured local deposition of 20-34% is reproduced if re-erosion of deposits is enhanced by a factor of 2.5-7 compared to graphite erosion. If deposits are treated like the substrate, the modelled deposition is 55%. Deposition measurements at the shadowed area around injectors can be well explained by assuming negligible re-erosion but similar sticking behaviour there as on plasma-wetted surfaces.

引用

页数：5

共 13 条

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