Tungsten as plasma-facing material in ASDEX Upgrade
Tungsten as plasma-facing material in ASDEX Upgrade
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DOI：
10.1016/s0920-3796(02)00381-2
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发表时间：
2003-04
影响因子：
1.7
通讯作者：
R. Neu;R. Dux;A. Geier;O. Gruber;A. Kallenbach;K. Krieger;H. Maier;R. Pugno;V. Rohde;S. Schweizer
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文献类型：
--
作者：
R. Neu;R. Dux;A. Geier;O. Gruber;A. Kallenbach;K. Krieger;H. Maier;R. Pugno;V. Rohde;S. Schweizer
自 1993 年以来，ASDEX Upgrade 一直在运行钨计划，最终于 1995 年安装了完整的 W 偏滤器，随后运行了一年。从1998年起，ASDEX升级中心柱安装的钨涂层瓦的面积不断增加，2001/2002年达到7.1平方米，约占中心柱总面积的85%。该计划不仅包括大面积钨涂层的操作，还包括涂层瓷砖的鉴定和测试、钨侵蚀和迁移研究、光谱诊断的开发以及通过杂质传输计算对观察到的钨行为的解释。在使用钨偏滤器以及钨涂层中心柱的试验中，几乎没有发现对等离子体性能的负面影响。 W 侵蚀主要由轻质本征杂质主导，主等离子体中的典型钨浓度范围从低于 10−6 到 10−5 的几倍，这对于燃烧等离子体来说足够低。
Since 1993, a tungsten programme is run at ASDEX Upgrade, leading to the installation of a complete W-divertor in 1995 followed by 1 year of operation. From 1998 onwards, an increasing area of tungsten-coated tiles has been installed at the central column of ASDEX Upgrade, reaching an area of 7.1 m2in 2001/2002 representing about 85% of the total area of the central column. The programme comprises not only the operation with large area W-coatings but also the qualification and testing of the coated tiles, W-erosion and -migration investigations, development of spectroscopic diagnostics and interpretation of the observed W-behaviour by impurity transport calculations. During the campaigns with the W-divertor as well as with W-coated central column, almost no negative influence on the plasma performance was found. The W-erosion is dominated by light intrinsic impurities and typical tungsten concentrations in the main plasma range from below 10−6up to a few times 10−5, which would be sufficiently low for a burning plasma.