Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET

G.J. van Rooij; J.W. Coenen; Leena Aho-Mantila; S. Brezinsek; M. Clever; R. Dux; K. Krieger; S. Marsen; M. Groth; G.F. Matthews; A. Meigs; R. Neu; S. Potzel; T. Pütterich; J. Rapp; M.F. Stamp; JET-EFDA contributors

doi:10.1016/j.jnucmat.2013.01.007

Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET

G.J. van Rooij (Corresponding Author), J.W. Coenen, Leena Aho-Mantila, S. Brezinsek, M. Clever, R. Dux, K. Krieger, S. Marsen, M. Groth, G.F. Matthews, A. Meigs, R. Neu, S. Potzel, T. Pütterich, J. Rapp, M.F. Stamp, JET-EFDA contributors

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

117 Citations (Scopus)

Abstract

Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10⁻⁴ were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposition was observed in the analysis of WI 400.9 nm and WII 364 nm line ratios and indicative of >50% redeposition fractions. Inter- and intra-ELM sputtering were compared for an example of 10 Hz ELMs with 13 MW NBI heating, in which intra-ELM sputtering was found to dominate by a factor of 5. Nitrogen seeding initially increased the tungsten sputtering threefold due to higher extrinsic impurity levels and effectively reduced the tungsten sputtering when the divertor plasma temperature was decreased from the initial 25 eV down to 15 eV.

Original language	English
Pages (from-to)	S42-S47
Journal	Journal of Nuclear Materials
Volume	438
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.007
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

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van Rooij, G. J., Coenen, J. W., Aho-Mantila, L., Brezinsek, S., Clever, M., Dux, R., Krieger, K., Marsen, S., Groth, M., Matthews, G. F., Meigs, A., Neu, R., Potzel, S., Pütterich, T., Rapp, J., Stamp, M. F., & JET-EFDA contributors (2013). Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET. Journal of Nuclear Materials, 438, S42-S47. https://doi.org/10.1016/j.jnucmat.2013.01.007

@article{f880c84b6e9341de86214356fcfd5a8b,

title = "Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET",

abstract = "Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10−4 were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposition was observed in the analysis of WI 400.9 nm and WII 364 nm line ratios and indicative of >50% redeposition fractions. Inter- and intra-ELM sputtering were compared for an example of 10 Hz ELMs with 13 MW NBI heating, in which intra-ELM sputtering was found to dominate by a factor of 5. Nitrogen seeding initially increased the tungsten sputtering threefold due to higher extrinsic impurity levels and effectively reduced the tungsten sputtering when the divertor plasma temperature was decreased from the initial 25 eV down to 15 eV.",

author = "{van Rooij}, G.J. and J.W. Coenen and Leena Aho-Mantila and S. Brezinsek and M. Clever and R. Dux and K. Krieger and S. Marsen and M. Groth and G.F. Matthews and A. Meigs and R. Neu and S. Potzel and T. P{\"u}tterich and J. Rapp and M.F. Stamp and {JET-EFDA contributors}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.007",

language = "English",

volume = "438",

pages = "S42--S47",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

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

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van Rooij, GJ, Coenen, JW, Aho-Mantila, L, Brezinsek, S, Clever, M, Dux, R, Krieger, K, Marsen, S, Groth, M, Matthews, GF, Meigs, A, Neu, R, Potzel, S, Pütterich, T, Rapp, J, Stamp, MF & JET-EFDA contributors 2013, 'Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET', Journal of Nuclear Materials, vol. 438, pp. S42-S47. https://doi.org/10.1016/j.jnucmat.2013.01.007

TY - JOUR

T1 - Tungsten divertor erosion in all metal devices

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

AU - van Rooij, G.J.

AU - Coenen, J.W.

AU - Aho-Mantila, Leena

AU - Brezinsek, S.

AU - Clever, M.

AU - Dux, R.

AU - Krieger, K.

AU - Marsen, S.

AU - Groth, M.

AU - Matthews, G.F.

AU - Meigs, A.

AU - Neu, R.

AU - Potzel, S.

AU - Pütterich, T.

AU - Rapp, J.

AU - Stamp, M.F.

AU - JET-EFDA contributors

PY - 2013

Y1 - 2013

N2 - Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10−4 were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposition was observed in the analysis of WI 400.9 nm and WII 364 nm line ratios and indicative of >50% redeposition fractions. Inter- and intra-ELM sputtering were compared for an example of 10 Hz ELMs with 13 MW NBI heating, in which intra-ELM sputtering was found to dominate by a factor of 5. Nitrogen seeding initially increased the tungsten sputtering threefold due to higher extrinsic impurity levels and effectively reduced the tungsten sputtering when the divertor plasma temperature was decreased from the initial 25 eV down to 15 eV.

AB - Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10−4 were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposition was observed in the analysis of WI 400.9 nm and WII 364 nm line ratios and indicative of >50% redeposition fractions. Inter- and intra-ELM sputtering were compared for an example of 10 Hz ELMs with 13 MW NBI heating, in which intra-ELM sputtering was found to dominate by a factor of 5. Nitrogen seeding initially increased the tungsten sputtering threefold due to higher extrinsic impurity levels and effectively reduced the tungsten sputtering when the divertor plasma temperature was decreased from the initial 25 eV down to 15 eV.

U2 - 10.1016/j.jnucmat.2013.01.007

DO - 10.1016/j.jnucmat.2013.01.007

M3 - Article

SN - 0022-3115

VL - 438

SP - S42-S47

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

Y2 - 21 May 2012 through 25 May 2012

ER -

Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET

Abstract

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