Erosion at the inner wall of JET during the discharge campaigns 2001-2009

M. Mayer; S. Krat; J.P. Coad; Antti Hakola; Jari Likonen; S. Lindig; A. Widdowson; JET-EFDA contributors

doi:10.1016/j.jnucmat.2013.01.167

Erosion at the inner wall of JET during the discharge campaigns 2001-2009

M. Mayer (Corresponding Author), S. Krat, J.P. Coad, Antti Hakola, Jari Likonen, S. Lindig, A. Widdowson, JET-EFDA contributors

Research output: Contribution to journal › Article › Scientific › peer-review

22 Citations (Scopus)

Abstract

The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.

Original language	English
Pages (from-to)	S780-S783
Journal	Journal of Nuclear Materials
Volume	438
Issue number	Supplement
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.167
Publication status	Published - 2013
MoE publication type	A1 Journal article-refereed
Event	20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany Duration: 21 May 2012 → 25 May 2012

Access to Document

10.1016/j.jnucmat.2013.01.167

Cite this

@article{7fca01c84e764b4590838607be1fd05b,

title = "Erosion at the inner wall of JET during the discharge campaigns 2001-2009",

abstract = "The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.",

author = "M. Mayer and S. Krat and J.P. Coad and Antti Hakola and Jari Likonen and S. Lindig and A. Widdowson and {JET-EFDA contributors}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.167",

language = "English",

volume = "438",

pages = "S780--S783",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

number = "Supplement",

note = "20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, PSI-20 ; Conference date: 21-05-2012 Through 25-05-2012",

}

TY - JOUR

T1 - Erosion at the inner wall of JET during the discharge campaigns 2001-2009

AU - Mayer, M.

AU - Krat, S.

AU - Coad, J.P.

AU - Hakola, Antti

AU - Likonen, Jari

AU - Lindig, S.

AU - Widdowson, A.

AU - JET-EFDA contributors

PY - 2013

Y1 - 2013

N2 - The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.

AB - The erosion of Be, C, Ni and W marker layers was investigated with long-term samples exposed during the discharge periods 2001–2004 and 2005–2009. The markers were mounted in carbon wall tiles between the inner wall guard limiters (IWGLs) and at positions between the lower end of the IWGLs and the inner divertor entrance. They were analyzed using ion beam analysis techniques before and after exposure. All samples showed strong erosion of all elements. The erosion is predominantly due to neutral particles created by charge-exchange (CX) collisions. The erosion of carbon was about 8 × 1019 atoms/cm2 (about 8 μm) during the 2005–2009 campaign, which gives a total erosion of carbon from the recessed areas between the IWGLs of about 230 g: The inner wall is therefore an important net carbon source. The erosion of the four different elements allows a rough reconstruction of the energy spectrum of the eroding CX neutrals.

U2 - 10.1016/j.jnucmat.2013.01.167

DO - 10.1016/j.jnucmat.2013.01.167

M3 - Article

SN - 0022-3115

VL - 438

SP - S780-S783

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - Supplement

T2 - 20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices

Y2 - 21 May 2012 through 25 May 2012

ER -

Erosion at the inner wall of JET during the discharge campaigns 2001-2009

Abstract

Access to Document

Fingerprint

Cite this