Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum

A. Huber*, S. Brezinsek, A. Kirschner, P. Ström, G. Sergienko, V. Huber, I. Borodkina, D. Douai, S. Jachmich, C. H. Linsmeier, B. Lomanowski, G. F. Matthews, P. H. Mertens, JET Contributors

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

12 Sitaatiot (Scopus)
166 Lataukset (Pure)

Abstrakti

The identification of the sources of atomic tungsten and the measurement of their radiation distribution in front of all plasma-facing components has been performed in JET with the help of two digital cameras with the same two-dimensional view, equipped with interference filters of different bandwidths centred on the W I (400.88 nm) emission line. A new algorithm for the subtraction of the continuum radiation was successfully developed and is now used to evaluate the W erosion even in the inner divertor region where the strong recombination emission is dominating over the tungsten emission. Analysis of W sputtering and W redistribution in the divertor by video imaging spectroscopy with high spatial resolution for three different magnetic configurations was performed. A strong variation of the emission of the neutral tungsten in toroidal direction and corresponding W erosion has been observed. It correlates strongly with the wetted area with a maximal W erosion at the edge of the divertor tile.

AlkuperäiskieliEnglanti
Sivut118-124
Sivumäärä7
JulkaisuNuclear Materials and Energy
Vuosikerta18
DOI - pysyväislinkit
TilaJulkaistu - 1 tammik. 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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