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

doi:10.1016/j.nme.2018.12.009

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

^*Corresponding author for this work

Department of Applied Physics

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Abstract

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.

Original language	English
Pages (from-to)	118-124
Number of pages	7
Journal	Nuclear Materials and Energy
Volume	18
DOIs	https://doi.org/10.1016/j.nme.2018.12.009
Publication status	Published - 1 Jan 2019
MoE publication type	A1 Journal article-refereed

Keywords

JET-ILW
PFC
PSI
Tungsten erosion
Tungsten imaging spectroscopy
W Divertor

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1-s2.0-S2352179118301406-mainFinal published version, 2.2 MBLicence: CC BY

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Huber, A., Brezinsek, S., Kirschner, A., Ström, P., Sergienko, G., Huber, V., Borodkina, I., Douai, D., Jachmich, S., Linsmeier, C. H., Lomanowski, B., Matthews, G. F., Mertens, P. H., & JET Contributors (2019). Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum. Nuclear Materials and Energy, 18, 118-124. https://doi.org/10.1016/j.nme.2018.12.009

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

abstract = "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.",

keywords = "JET-ILW, PFC, PSI, Tungsten erosion, Tungsten imaging spectroscopy, W Divertor",

author = "A. Huber and S. Brezinsek and A. Kirschner and P. Str{\"o}m and G. Sergienko and V. Huber and I. Borodkina and D. Douai and S. Jachmich and Linsmeier, {C. H.} and B. Lomanowski and Matthews, {G. F.} and Mertens, {P. H.} and {JET Contributors}",

note = "| openaire: EC/H2020/633053/EU//EUROfusion ",

year = "2019",

month = jan,

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doi = "10.1016/j.nme.2018.12.009",

language = "English",

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Huber, A, Brezinsek, S, Kirschner, A, Ström, P, Sergienko, G, Huber, V, Borodkina, I, Douai, D, Jachmich, S, Linsmeier, CH, Lomanowski, B, Matthews, GF, Mertens, PH & JET Contributors 2019, 'Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum', Nuclear Materials and Energy, vol. 18, pp. 118-124. https://doi.org/10.1016/j.nme.2018.12.009

TY - JOUR

T1 - Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum

AU - Huber, A.

AU - Brezinsek, S.

AU - Kirschner, A.

AU - Ström, P.

AU - Sergienko, G.

AU - Huber, V.

AU - Borodkina, I.

AU - Douai, D.

AU - Jachmich, S.

AU - Linsmeier, C. H.

AU - Lomanowski, B.

AU - Matthews, G. F.

AU - Mertens, P. H.

AU - JET Contributors

N1 - | openaire: EC/H2020/633053/EU//EUROfusion

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

KW - JET-ILW

KW - PFC

KW - PSI

KW - Tungsten erosion

KW - Tungsten imaging spectroscopy

KW - W Divertor

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DO - 10.1016/j.nme.2018.12.009

M3 - Article

AN - SCOPUS:85058552880

SN - 2352-1791

VL - 18

SP - 118

EP - 124

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

ER -

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

Abstract

Keywords

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