Beryllium accumulation at the inner divertor of JET

Jari Likonen; Elizaveta Vainonen-Ahlgren; J.P. Coad; Riitta Zilliacus; Tommi Renvall; D.E. Hole; M. Rubel; K. Arstila; G.F. Matthews; M. Stamp; null JET-EFDA Contributors

doi:10.1016/j.jnucmat.2004.10.151

Beryllium accumulation at the inner divertor of JET

Jari Likonen (Corresponding Author), Elizaveta Vainonen-Ahlgren, J.P. Coad, Riitta Zilliacus, Tommi Renvall, D.E. Hole, M. Rubel, K. Arstila, G.F. Matthews, M. Stamp, JET-EFDA Contributors

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

25 Citations (Scopus)

Abstract

MkIIGB divertor tiles exposed in JET for the 1998–2001 and 1999–2001 campaigns have been used to assess the amount of beryllium and carbon deposited at the inner divertor wall. Total amount of Be at the inner divertor tiles was determined and integrated toroidally. Results were compared with data obtained with optical spectroscopy and good agreement was obtained. The amount of deposited C was computed from the amount of deposited Be assuming that the Be/C ratio arriving in the divertor is the same as the Be/C ratio in the main chamber. On the basis of this analysis we would expect there to be ∼0.4 kg of C deposited. This gives an average C deposition rate lower than during the MkIIA phase.

Original language	English
Pages (from-to)	60 - 64
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	337-339
DOIs	https://doi.org/10.1016/j.jnucmat.2004.10.151
Publication status	Published - 2005
MoE publication type	A1 Journal article-refereed

Keywords

divertor
beryllium
carbon based materials
surface analysis
JET
fusion energy
plasma
ITER

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10.1016/j.jnucmat.2004.10.151

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title = "Beryllium accumulation at the inner divertor of JET",

abstract = "MkIIGB divertor tiles exposed in JET for the 1998–2001 and 1999–2001 campaigns have been used to assess the amount of beryllium and carbon deposited at the inner divertor wall. Total amount of Be at the inner divertor tiles was determined and integrated toroidally. Results were compared with data obtained with optical spectroscopy and good agreement was obtained. The amount of deposited C was computed from the amount of deposited Be assuming that the Be/C ratio arriving in the divertor is the same as the Be/C ratio in the main chamber. On the basis of this analysis we would expect there to be ∼0.4 kg of C deposited. This gives an average C deposition rate lower than during the MkIIA phase.",

keywords = "divertor, beryllium, carbon based materials, surface analysis, JET, fusion energy, plasma, ITER",

author = "Jari Likonen and Elizaveta Vainonen-Ahlgren and J.P. Coad and Riitta Zilliacus and Tommi Renvall and D.E. Hole and M. Rubel and K. Arstila and G.F. Matthews and M. Stamp and {JET-EFDA Contributors}",

year = "2005",

doi = "10.1016/j.jnucmat.2004.10.151",

language = "English",

volume = "337-339",

pages = "60 -- 64",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

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TY - JOUR

T1 - Beryllium accumulation at the inner divertor of JET

AU - Likonen, Jari

AU - Vainonen-Ahlgren, Elizaveta

AU - Coad, J.P.

AU - Zilliacus, Riitta

AU - Renvall, Tommi

AU - Hole, D.E.

AU - Rubel, M.

AU - Arstila, K.

AU - Matthews, G.F.

AU - Stamp, M.

AU - JET-EFDA Contributors, null

PY - 2005

Y1 - 2005

N2 - MkIIGB divertor tiles exposed in JET for the 1998–2001 and 1999–2001 campaigns have been used to assess the amount of beryllium and carbon deposited at the inner divertor wall. Total amount of Be at the inner divertor tiles was determined and integrated toroidally. Results were compared with data obtained with optical spectroscopy and good agreement was obtained. The amount of deposited C was computed from the amount of deposited Be assuming that the Be/C ratio arriving in the divertor is the same as the Be/C ratio in the main chamber. On the basis of this analysis we would expect there to be ∼0.4 kg of C deposited. This gives an average C deposition rate lower than during the MkIIA phase.

AB - MkIIGB divertor tiles exposed in JET for the 1998–2001 and 1999–2001 campaigns have been used to assess the amount of beryllium and carbon deposited at the inner divertor wall. Total amount of Be at the inner divertor tiles was determined and integrated toroidally. Results were compared with data obtained with optical spectroscopy and good agreement was obtained. The amount of deposited C was computed from the amount of deposited Be assuming that the Be/C ratio arriving in the divertor is the same as the Be/C ratio in the main chamber. On the basis of this analysis we would expect there to be ∼0.4 kg of C deposited. This gives an average C deposition rate lower than during the MkIIA phase.

KW - divertor

KW - beryllium

KW - carbon based materials

KW - surface analysis

KW - JET

KW - fusion energy

KW - plasma

KW - ITER

U2 - 10.1016/j.jnucmat.2004.10.151

DO - 10.1016/j.jnucmat.2004.10.151

M3 - Article

VL - 337-339

SP - 60

EP - 64

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

Beryllium accumulation at the inner divertor of JET

Abstract

Keywords

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