Thermal analysis of an exposed tungsten edge in the JET divertor

G. Arnoux; J. Coenen; B. Bazylev; Y. Corre; G. F. Matthews; I. Balboa; M. Clever; R. Dejarnac; S. Devaux; T. Eich; E. Gauthier; L. Frassinetti; J. Horacek; S. Jachmich; D. Kinna; S. Marsen; Ph Mertens; R. A. Pitts; M. Rack; G. Sergienko; B. Sieglin; M. Stamp; V. Thompson

doi:10.1016/j.jnucmat.2014.11.005

Thermal analysis of an exposed tungsten edge in the JET divertor

G. Arnoux, J. Coenen, B. Bazylev, Y. Corre, G. F. Matthews, I. Balboa, M. Clever, R. Dejarnac, S. Devaux, T. Eich, E. Gauthier, L. Frassinetti, J. Horacek, S. Jachmich, D. Kinna, S. Marsen, Ph Mertens, R. A. Pitts, M. Rack, G. SergienkoB. Sieglin, M. Stamp, V. Thompson

Laboratory for Plasma Physics

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

Abstract

Abstract In the recent melt experiments with the JET tungsten divertor, we observe that the heat flux impacting on a leading edge is 3-10 times lower than a geometrical projection would predict. The surface temperature, tungsten vaporisation rate and melt motion measured during these experiments is consistent with the simulations using the MEMOS code, only if one applies the heat flux reduction. This unexpected observation is the result of our efforts to demonstrate that the tungsten lamella was melted by ELM induced transient heat loads only. This paper describes in details the measurements and data analysis method that led us to this strong conclusion. The reason for the reduced heat flux are yet to be clearly established and we provide some ideas to explore. Explaining the physics of this heat flux reduction would allow to understand whether it can be extrapolated to ITER.

Original language	English
Article number	48599
Pages (from-to)	415-419
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.005
Publication status	Published - 22 Jul 2015

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10.1016/j.jnucmat.2014.11.005

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Arnoux, G., Coenen, J., Bazylev, B., Corre, Y., Matthews, G. F., Balboa, I., Clever, M., Dejarnac, R., Devaux, S., Eich, T., Gauthier, E., Frassinetti, L., Horacek, J., Jachmich, S., Kinna, D., Marsen, S., Mertens, P., Pitts, R. A., Rack, M., ... Thompson, V. (2015). Thermal analysis of an exposed tungsten edge in the JET divertor. Journal of Nuclear Materials, 463, 415-419. Article 48599. https://doi.org/10.1016/j.jnucmat.2014.11.005

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title = "Thermal analysis of an exposed tungsten edge in the JET divertor",

abstract = "Abstract In the recent melt experiments with the JET tungsten divertor, we observe that the heat flux impacting on a leading edge is 3-10 times lower than a geometrical projection would predict. The surface temperature, tungsten vaporisation rate and melt motion measured during these experiments is consistent with the simulations using the MEMOS code, only if one applies the heat flux reduction. This unexpected observation is the result of our efforts to demonstrate that the tungsten lamella was melted by ELM induced transient heat loads only. This paper describes in details the measurements and data analysis method that led us to this strong conclusion. The reason for the reduced heat flux are yet to be clearly established and we provide some ideas to explore. Explaining the physics of this heat flux reduction would allow to understand whether it can be extrapolated to ITER.",

author = "G. Arnoux and J. Coenen and B. Bazylev and Y. Corre and Matthews, {G. F.} and I. Balboa and M. Clever and R. Dejarnac and S. Devaux and T. Eich and E. Gauthier and L. Frassinetti and J. Horacek and S. Jachmich and D. Kinna and S. Marsen and Ph Mertens and Pitts, {R. A.} and M. Rack and G. Sergienko and B. Sieglin and M. Stamp and V. Thompson",

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year = "2015",

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doi = "10.1016/j.jnucmat.2014.11.005",

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Arnoux, G, Coenen, J, Bazylev, B, Corre, Y, Matthews, GF, Balboa, I, Clever, M, Dejarnac, R, Devaux, S, Eich, T, Gauthier, E, Frassinetti, L, Horacek, J, Jachmich, S, Kinna, D, Marsen, S, Mertens, P, Pitts, RA, Rack, M, Sergienko, G, Sieglin, B, Stamp, M & Thompson, V 2015, 'Thermal analysis of an exposed tungsten edge in the JET divertor', Journal of Nuclear Materials, vol. 463, 48599, pp. 415-419. https://doi.org/10.1016/j.jnucmat.2014.11.005

TY - JOUR

T1 - Thermal analysis of an exposed tungsten edge in the JET divertor

AU - Arnoux, G.

AU - Coenen, J.

AU - Bazylev, B.

AU - Corre, Y.

AU - Matthews, G. F.

AU - Balboa, I.

AU - Clever, M.

AU - Dejarnac, R.

AU - Devaux, S.

AU - Eich, T.

AU - Gauthier, E.

AU - Frassinetti, L.

AU - Horacek, J.

AU - Jachmich, S.

AU - Kinna, D.

AU - Marsen, S.

AU - Mertens, Ph

AU - Pitts, R. A.

AU - Rack, M.

AU - Sergienko, G.

AU - Sieglin, B.

AU - Stamp, M.

AU - Thompson, V.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract In the recent melt experiments with the JET tungsten divertor, we observe that the heat flux impacting on a leading edge is 3-10 times lower than a geometrical projection would predict. The surface temperature, tungsten vaporisation rate and melt motion measured during these experiments is consistent with the simulations using the MEMOS code, only if one applies the heat flux reduction. This unexpected observation is the result of our efforts to demonstrate that the tungsten lamella was melted by ELM induced transient heat loads only. This paper describes in details the measurements and data analysis method that led us to this strong conclusion. The reason for the reduced heat flux are yet to be clearly established and we provide some ideas to explore. Explaining the physics of this heat flux reduction would allow to understand whether it can be extrapolated to ITER.

AB - Abstract In the recent melt experiments with the JET tungsten divertor, we observe that the heat flux impacting on a leading edge is 3-10 times lower than a geometrical projection would predict. The surface temperature, tungsten vaporisation rate and melt motion measured during these experiments is consistent with the simulations using the MEMOS code, only if one applies the heat flux reduction. This unexpected observation is the result of our efforts to demonstrate that the tungsten lamella was melted by ELM induced transient heat loads only. This paper describes in details the measurements and data analysis method that led us to this strong conclusion. The reason for the reduced heat flux are yet to be clearly established and we provide some ideas to explore. Explaining the physics of this heat flux reduction would allow to understand whether it can be extrapolated to ITER.

UR - http://www.scopus.com/inward/record.url?scp=84937683554&partnerID=8YFLogxK

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DO - 10.1016/j.jnucmat.2014.11.005

M3 - Article

AN - SCOPUS:84937683554

SN - 0022-3115

VL - 463

SP - 415

EP - 419

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48599

ER -

Thermal analysis of an exposed tungsten edge in the JET divertor

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