Comparative study of the dust particle population sampled during four consecutive campaigns in full-tungsten ASDEX Upgrade

Nikolaus Endstrasser; Volker Rohde; Martin Balden; Paul Humrickhouse; Udo Von Toussaint; Bastiaan J. Braams; Hyun Kyung Chung; Rudolf Neu

doi:10.1088/0031-8949/2011/T145/014021

Comparative study of the dust particle population sampled during four consecutive campaigns in full-tungsten ASDEX Upgrade

Nikolaus Endstrasser, Volker Rohde, Martin Balden, Paul Humrickhouse, Udo Von Toussaint, Bastiaan J. Braams, Hyun Kyung Chung, Rudolf Neu

Research output: Contribution to journal › Conference article › peer-review

23 Scopus citations

Abstract

Scanning electron microscopy images and energy-dispersive x-ray spectra were recorded for a total of about 4×10 ⁴ dust particles collected on the same position within the vacuum vessel via silicon wafers during four consecutive full-tungsten first wall campaigns of ASDEX Upgrade between 2007 and 2009. By careful analysis of the elemental composition and shape of the sampled particles, seven statistically relevant classes of dust were identified. The particle flux and area coverage of each class were normalized to the total plasma duration of each sampling period, revealing a high sensitivity of the dust composition to device conditioning. According to the present results, particles produced by arcing on divertor tiles with delaminated coatings were transported to the main chamber first wall.

Original language	English
Article number	014021
Journal	Physica Scripta
Volume	T145
DOIs	https://doi.org/10.1088/0031-8949/2011/T145/014021
State	Published - 2011
Externally published	Yes
Event	13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-13 and 1st International Conference on Fusion Energy Materials Science, FEMaS-1 - Rosenheim, Germany Duration: May 9 2011 → May 13 2011

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10.1088/0031-8949/2011/T145/014021

Cite this

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title = "Comparative study of the dust particle population sampled during four consecutive campaigns in full-tungsten ASDEX Upgrade",

abstract = "Scanning electron microscopy images and energy-dispersive x-ray spectra were recorded for a total of about 4×10 4 dust particles collected on the same position within the vacuum vessel via silicon wafers during four consecutive full-tungsten first wall campaigns of ASDEX Upgrade between 2007 and 2009. By careful analysis of the elemental composition and shape of the sampled particles, seven statistically relevant classes of dust were identified. The particle flux and area coverage of each class were normalized to the total plasma duration of each sampling period, revealing a high sensitivity of the dust composition to device conditioning. According to the present results, particles produced by arcing on divertor tiles with delaminated coatings were transported to the main chamber first wall.",

author = "Nikolaus Endstrasser and Volker Rohde and Martin Balden and Paul Humrickhouse and {Von Toussaint}, Udo and Braams, {Bastiaan J.} and Chung, {Hyun Kyung} and Rudolf Neu",

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language = "English",

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journal = "Physica Scripta",

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T1 - Comparative study of the dust particle population sampled during four consecutive campaigns in full-tungsten ASDEX Upgrade

AU - Endstrasser, Nikolaus

AU - Rohde, Volker

AU - Balden, Martin

AU - Humrickhouse, Paul

AU - Von Toussaint, Udo

AU - Braams, Bastiaan J.

AU - Chung, Hyun Kyung

AU - Neu, Rudolf

PY - 2011

Y1 - 2011

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AB - Scanning electron microscopy images and energy-dispersive x-ray spectra were recorded for a total of about 4×10 4 dust particles collected on the same position within the vacuum vessel via silicon wafers during four consecutive full-tungsten first wall campaigns of ASDEX Upgrade between 2007 and 2009. By careful analysis of the elemental composition and shape of the sampled particles, seven statistically relevant classes of dust were identified. The particle flux and area coverage of each class were normalized to the total plasma duration of each sampling period, revealing a high sensitivity of the dust composition to device conditioning. According to the present results, particles produced by arcing on divertor tiles with delaminated coatings were transported to the main chamber first wall.

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DO - 10.1088/0031-8949/2011/T145/014021

M3 - Conference article

AN - SCOPUS:84857550552

SN - 0281-1847

VL - T145

JO - Physica Scripta

JF - Physica Scripta

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T2 - 13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-13 and 1st International Conference on Fusion Energy Materials Science, FEMaS-1

Y2 - 9 May 2011 through 13 May 2011

ER -

Comparative study of the dust particle population sampled during four consecutive campaigns in full-tungsten ASDEX Upgrade

Abstract

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