Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques

Jari Likonen (Corresponding Author), Sari Lehto, J.P. Coad, T. Renvall, T. Sajavaara, T. Ahlgren, D.E. Hole, G.F. Matthews, J. Keinonen, EFDA-JET work-programme

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

At the end of C4 campaign at JET, a 1% SiH4/99% D2 mixture and pure 13CH4 were injected into the torus from the outer divertor wall and from the top of the vessel, respectively, in order to study material transport and scrape-off layer (SOL) flows. A set of MkIIGB tiles was removed during the 2001 shutdown for surface analysis. The tiles were analysed with secondary ion mass spectrometry (SIMS) and time-of-flight elastic recoil detection analysis (TOF-ERDA). 13C was detected in the inner divertor wall tiles implying material transport from the top of the vessel. Silicon was detected mainly at the outer divertor wall tiles and very small amounts were found in the inner divertor wall tiles. Si amounts in the inner divertor wall tiles were so low that rigorous conclusions about material transport from divertor outboard to inboard cannot be made.
Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalFusion Engineering and Design
Volume66-68
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed
Event22nd Symposium on Fusion Technology - Helsinki, Finland
Duration: 9 Sep 200213 Sep 2002
Conference number: 22

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Tile
Secondary ion mass spectrometry
Ion beams
Impurities
Surface analysis
Silicon

Keywords

  • deposition
  • fusion material
  • transport
  • JET
  • divertor
  • plasma
  • fusion energy
  • fusion reactors

Cite this

Likonen, J., Lehto, S., Coad, J. P., Renvall, T., Sajavaara, T., Ahlgren, T., ... work-programme, EFDA-JET. (2003). Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques. Fusion Engineering and Design, 66-68, 219-224. https://doi.org/10.1016/S0920-3796(03)00216-3
Likonen, Jari ; Lehto, Sari ; Coad, J.P. ; Renvall, T. ; Sajavaara, T. ; Ahlgren, T. ; Hole, D.E. ; Matthews, G.F. ; Keinonen, J. ; work-programme, EFDA-JET. / Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques. In: Fusion Engineering and Design. 2003 ; Vol. 66-68. pp. 219-224.
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abstract = "At the end of C4 campaign at JET, a 1{\%} SiH4/99{\%} D2 mixture and pure 13CH4 were injected into the torus from the outer divertor wall and from the top of the vessel, respectively, in order to study material transport and scrape-off layer (SOL) flows. A set of MkIIGB tiles was removed during the 2001 shutdown for surface analysis. The tiles were analysed with secondary ion mass spectrometry (SIMS) and time-of-flight elastic recoil detection analysis (TOF-ERDA). 13C was detected in the inner divertor wall tiles implying material transport from the top of the vessel. Silicon was detected mainly at the outer divertor wall tiles and very small amounts were found in the inner divertor wall tiles. Si amounts in the inner divertor wall tiles were so low that rigorous conclusions about material transport from divertor outboard to inboard cannot be made.",
keywords = "deposition, fusion material, transport, JET, divertor, plasma, fusion energy, fusion reactors",
author = "Jari Likonen and Sari Lehto and J.P. Coad and T. Renvall and T. Sajavaara and T. Ahlgren and D.E. Hole and G.F. Matthews and J. Keinonen and EFDA-JET work-programme",
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Likonen, J, Lehto, S, Coad, JP, Renvall, T, Sajavaara, T, Ahlgren, T, Hole, DE, Matthews, GF, Keinonen, J & work-programme, EFDA-JET 2003, 'Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques', Fusion Engineering and Design, vol. 66-68, pp. 219-224. https://doi.org/10.1016/S0920-3796(03)00216-3

Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques. / Likonen, Jari (Corresponding Author); Lehto, Sari; Coad, J.P.; Renvall, T.; Sajavaara, T.; Ahlgren, T.; Hole, D.E.; Matthews, G.F.; Keinonen, J.; work-programme, EFDA-JET.

In: Fusion Engineering and Design, Vol. 66-68, 2003, p. 219-224.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Studies of impurity deposition/implantation in JET divertor tiles using SIMS and ion beam techniques

AU - Likonen, Jari

AU - Lehto, Sari

AU - Coad, J.P.

AU - Renvall, T.

AU - Sajavaara, T.

AU - Ahlgren, T.

AU - Hole, D.E.

AU - Matthews, G.F.

AU - Keinonen, J.

AU - work-programme, EFDA-JET

PY - 2003

Y1 - 2003

N2 - At the end of C4 campaign at JET, a 1% SiH4/99% D2 mixture and pure 13CH4 were injected into the torus from the outer divertor wall and from the top of the vessel, respectively, in order to study material transport and scrape-off layer (SOL) flows. A set of MkIIGB tiles was removed during the 2001 shutdown for surface analysis. The tiles were analysed with secondary ion mass spectrometry (SIMS) and time-of-flight elastic recoil detection analysis (TOF-ERDA). 13C was detected in the inner divertor wall tiles implying material transport from the top of the vessel. Silicon was detected mainly at the outer divertor wall tiles and very small amounts were found in the inner divertor wall tiles. Si amounts in the inner divertor wall tiles were so low that rigorous conclusions about material transport from divertor outboard to inboard cannot be made.

AB - At the end of C4 campaign at JET, a 1% SiH4/99% D2 mixture and pure 13CH4 were injected into the torus from the outer divertor wall and from the top of the vessel, respectively, in order to study material transport and scrape-off layer (SOL) flows. A set of MkIIGB tiles was removed during the 2001 shutdown for surface analysis. The tiles were analysed with secondary ion mass spectrometry (SIMS) and time-of-flight elastic recoil detection analysis (TOF-ERDA). 13C was detected in the inner divertor wall tiles implying material transport from the top of the vessel. Silicon was detected mainly at the outer divertor wall tiles and very small amounts were found in the inner divertor wall tiles. Si amounts in the inner divertor wall tiles were so low that rigorous conclusions about material transport from divertor outboard to inboard cannot be made.

KW - deposition

KW - fusion material

KW - transport

KW - JET

KW - divertor

KW - plasma

KW - fusion energy

KW - fusion reactors

U2 - 10.1016/S0920-3796(03)00216-3

DO - 10.1016/S0920-3796(03)00216-3

M3 - Article

VL - 66-68

SP - 219

EP - 224

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

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