Erosion/deposition in JET during the period 1999-2001

J.P. Coad (Corresponding Author), P. Andrew, D.E. Hole, S. Lehto, J. Likonen, G.F. Matthews, M. Rubel, EFDA-JET work-programme

Research output: Contribution to journalArticleScientificpeer-review

75 Citations (Scopus)

Abstract

Coated divertor and wall tiles exposed in JET for the 1999–2001 operations have been used to assess erosion/deposition. Deposited films of up to 90 μm thickness at the inner wall of the divertor tiles are, for the most part, enriched in beryllium and other metals, whilst carbon is probably chemically sputtered from these tiles and transported to shadowed regions of the inner divertor. However, from the composition at the surface of the tiles, it appears that the chemical erosion was ‘switched off’ by reducing the JET vessel wall temperature for the last part of the operations to 200 °C. Thick powdery deposits localised at the ion transport limit at each corner of the divertor may be due to physical sputtering. Erosion of the coatings is seen at the outer divertor wall, and on all the inner wall and outer limiter tiles.
Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalJournal of Nuclear Materials
Volume313-316
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed
EventPlasma-Surface Interactions in Controlled Fusion Devices 15 - Gifu, Japan
Duration: 26 May 200231 May 2002

Fingerprint

tiles
Tile
erosion
Erosion
Beryllium
Limiters
wall temperature
beryllium
vessels
Sputtering
Carbon
Deposits
sputtering
Metals
deposits
Ions
coatings
Coatings
carbon
Chemical analysis

Keywords

  • plasma-wall interactions
  • divertor
  • tritium retention
  • rutherford backscattering
  • SIMS
  • fusion energy
  • fusion reactors
  • JET

Cite this

Coad, J. P., Andrew, P., Hole, D. E., Lehto, S., Likonen, J., Matthews, G. F., ... work-programme, EFDA-JET. (2003). Erosion/deposition in JET during the period 1999-2001. Journal of Nuclear Materials, 313-316, 419-423. https://doi.org/10.1016/S0022-3115(02)01403-4
Coad, J.P. ; Andrew, P. ; Hole, D.E. ; Lehto, S. ; Likonen, J. ; Matthews, G.F. ; Rubel, M. ; work-programme, EFDA-JET. / Erosion/deposition in JET during the period 1999-2001. In: Journal of Nuclear Materials. 2003 ; Vol. 313-316. pp. 419-423.
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abstract = "Coated divertor and wall tiles exposed in JET for the 1999–2001 operations have been used to assess erosion/deposition. Deposited films of up to 90 μm thickness at the inner wall of the divertor tiles are, for the most part, enriched in beryllium and other metals, whilst carbon is probably chemically sputtered from these tiles and transported to shadowed regions of the inner divertor. However, from the composition at the surface of the tiles, it appears that the chemical erosion was ‘switched off’ by reducing the JET vessel wall temperature for the last part of the operations to 200 °C. Thick powdery deposits localised at the ion transport limit at each corner of the divertor may be due to physical sputtering. Erosion of the coatings is seen at the outer divertor wall, and on all the inner wall and outer limiter tiles.",
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Coad, JP, Andrew, P, Hole, DE, Lehto, S, Likonen, J, Matthews, GF, Rubel, M & work-programme, EFDA-JET 2003, 'Erosion/deposition in JET during the period 1999-2001', Journal of Nuclear Materials, vol. 313-316, pp. 419-423. https://doi.org/10.1016/S0022-3115(02)01403-4

Erosion/deposition in JET during the period 1999-2001. / Coad, J.P. (Corresponding Author); Andrew, P.; Hole, D.E.; Lehto, S.; Likonen, J.; Matthews, G.F.; Rubel, M.; work-programme, EFDA-JET.

In: Journal of Nuclear Materials, Vol. 313-316, 2003, p. 419-423.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Erosion/deposition in JET during the period 1999-2001

AU - Coad, J.P.

AU - Andrew, P.

AU - Hole, D.E.

AU - Lehto, S.

AU - Likonen, J.

AU - Matthews, G.F.

AU - Rubel, M.

AU - work-programme, EFDA-JET

PY - 2003

Y1 - 2003

N2 - Coated divertor and wall tiles exposed in JET for the 1999–2001 operations have been used to assess erosion/deposition. Deposited films of up to 90 μm thickness at the inner wall of the divertor tiles are, for the most part, enriched in beryllium and other metals, whilst carbon is probably chemically sputtered from these tiles and transported to shadowed regions of the inner divertor. However, from the composition at the surface of the tiles, it appears that the chemical erosion was ‘switched off’ by reducing the JET vessel wall temperature for the last part of the operations to 200 °C. Thick powdery deposits localised at the ion transport limit at each corner of the divertor may be due to physical sputtering. Erosion of the coatings is seen at the outer divertor wall, and on all the inner wall and outer limiter tiles.

AB - Coated divertor and wall tiles exposed in JET for the 1999–2001 operations have been used to assess erosion/deposition. Deposited films of up to 90 μm thickness at the inner wall of the divertor tiles are, for the most part, enriched in beryllium and other metals, whilst carbon is probably chemically sputtered from these tiles and transported to shadowed regions of the inner divertor. However, from the composition at the surface of the tiles, it appears that the chemical erosion was ‘switched off’ by reducing the JET vessel wall temperature for the last part of the operations to 200 °C. Thick powdery deposits localised at the ion transport limit at each corner of the divertor may be due to physical sputtering. Erosion of the coatings is seen at the outer divertor wall, and on all the inner wall and outer limiter tiles.

KW - plasma-wall interactions

KW - divertor

KW - tritium retention

KW - rutherford backscattering

KW - SIMS

KW - fusion energy

KW - fusion reactors

KW - JET

U2 - 10.1016/S0022-3115(02)01403-4

DO - 10.1016/S0022-3115(02)01403-4

M3 - Article

VL - 313-316

SP - 419

EP - 423

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

ER -

Coad JP, Andrew P, Hole DE, Lehto S, Likonen J, Matthews GF et al. Erosion/deposition in JET during the period 1999-2001. Journal of Nuclear Materials. 2003;313-316:419-423. https://doi.org/10.1016/S0022-3115(02)01403-4