Plasma radiation distribution and radiation loads onto the vessel during transient events in JET

A. Huber; R. A. Pitts; A. Loarte; V. Philipps; P. Andrew; S. Brezinsek; J. P. Coad; T. Eich; J. C. Fuchs; W. Fundamenski; S. Jachmich; G. F. Matthews; K. McCormick; Ph Mertens; J. Rapp; G. Sergienko; M. F. Stamp

doi:10.1016/j.jnucmat.2009.01.219

Plasma radiation distribution and radiation loads onto the vessel during transient events in JET

A. Huber, R. A. Pitts, A. Loarte, V. Philipps, P. Andrew, S. Brezinsek, J. P. Coad, T. Eich, J. C. Fuchs, W. Fundamenski, S. Jachmich, G. F. Matthews, K. McCormick, Ph Mertens, J. Rapp, G. Sergienko, M. F. Stamp

Laboratory for Plasma Physics

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The JET bolometer camera system allows greatly improved tomographic reconstruction of the radiation pattern on a timescale of the order of the typical duration of a Type I ELM period (≈0.1-0.4 ms). The ELM-induced radiation is always higher at the inner than at the outer divertor with an approximately linear increase of the asymmetry up to a total ΔW_ELM of about 0.6 MJ and a decrease for higher ΔW_ELM. Large Type I ELMs with energy losses above 0.65-0.7 MJ show enhanced radiation losses, which are associated with the ablation of thick co-deposited layers in the inner divertor. During the 'compound' phase, plasma contamination can increase but does not usually lead to radiative collapse of the plasma. It is found that the radiation distribution during the transient events is poloidally asymmetric with a maximum of the observed 'radiation peaking factor' for the disruptive current quench and for MARFEs of about 4.5, and less than 5 during VDEs.

langue originale	Anglais
Pages (de - à)	830-834
Nombre de pages	5
journal	Journal of Nuclear Materials
Volume	390-391
Numéro de publication	1
Les DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.219
état	Publié - 15 juin 2009

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10.1016/j.jnucmat.2009.01.219

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Huber, A., Pitts, R. A., Loarte, A., Philipps, V., Andrew, P., Brezinsek, S., Coad, J. P., Eich, T., Fuchs, J. C., Fundamenski, W., Jachmich, S., Matthews, G. F., McCormick, K., Mertens, P., Rapp, J., Sergienko, G., & Stamp, M. F. (2009). Plasma radiation distribution and radiation loads onto the vessel during transient events in JET. Journal of Nuclear Materials, 390-391(1), 830-834. https://doi.org/10.1016/j.jnucmat.2009.01.219

@article{db2c48f65e6446f2b07ea0c9ccb16b16,

title = "Plasma radiation distribution and radiation loads onto the vessel during transient events in JET",

abstract = "The JET bolometer camera system allows greatly improved tomographic reconstruction of the radiation pattern on a timescale of the order of the typical duration of a Type I ELM period (≈0.1-0.4 ms). The ELM-induced radiation is always higher at the inner than at the outer divertor with an approximately linear increase of the asymmetry up to a total ΔWELM of about 0.6 MJ and a decrease for higher ΔWELM. Large Type I ELMs with energy losses above 0.65-0.7 MJ show enhanced radiation losses, which are associated with the ablation of thick co-deposited layers in the inner divertor. During the 'compound' phase, plasma contamination can increase but does not usually lead to radiative collapse of the plasma. It is found that the radiation distribution during the transient events is poloidally asymmetric with a maximum of the observed 'radiation peaking factor' for the disruptive current quench and for MARFEs of about 4.5, and less than 5 during VDEs.",

author = "A. Huber and Pitts, {R. A.} and A. Loarte and V. Philipps and P. Andrew and S. Brezinsek and Coad, {J. P.} and T. Eich and Fuchs, {J. C.} and W. Fundamenski and S. Jachmich and Matthews, {G. F.} and K. McCormick and Ph Mertens and J. Rapp and G. Sergienko and Stamp, {M. F.}",

year = "2009",

month = jun,

day = "15",

doi = "10.1016/j.jnucmat.2009.01.219",

language = "English",

volume = "390-391",

pages = "830--834",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

number = "1",

}

Huber, A, Pitts, RA, Loarte, A, Philipps, V, Andrew, P, Brezinsek, S, Coad, JP, Eich, T, Fuchs, JC, Fundamenski, W, Jachmich, S, Matthews, GF, McCormick, K, Mertens, P, Rapp, J, Sergienko, G & Stamp, MF 2009, 'Plasma radiation distribution and radiation loads onto the vessel during transient events in JET', Journal of Nuclear Materials, VOL. 390-391, Numéro 1, p. 830-834. https://doi.org/10.1016/j.jnucmat.2009.01.219

TY - JOUR

T1 - Plasma radiation distribution and radiation loads onto the vessel during transient events in JET

AU - Huber, A.

AU - Pitts, R. A.

AU - Loarte, A.

AU - Philipps, V.

AU - Andrew, P.

AU - Brezinsek, S.

AU - Coad, J. P.

AU - Eich, T.

AU - Fuchs, J. C.

AU - Fundamenski, W.

AU - Jachmich, S.

AU - Matthews, G. F.

AU - McCormick, K.

AU - Mertens, Ph

AU - Rapp, J.

AU - Sergienko, G.

AU - Stamp, M. F.

PY - 2009/6/15

Y1 - 2009/6/15

N2 - The JET bolometer camera system allows greatly improved tomographic reconstruction of the radiation pattern on a timescale of the order of the typical duration of a Type I ELM period (≈0.1-0.4 ms). The ELM-induced radiation is always higher at the inner than at the outer divertor with an approximately linear increase of the asymmetry up to a total ΔWELM of about 0.6 MJ and a decrease for higher ΔWELM. Large Type I ELMs with energy losses above 0.65-0.7 MJ show enhanced radiation losses, which are associated with the ablation of thick co-deposited layers in the inner divertor. During the 'compound' phase, plasma contamination can increase but does not usually lead to radiative collapse of the plasma. It is found that the radiation distribution during the transient events is poloidally asymmetric with a maximum of the observed 'radiation peaking factor' for the disruptive current quench and for MARFEs of about 4.5, and less than 5 during VDEs.

AB - The JET bolometer camera system allows greatly improved tomographic reconstruction of the radiation pattern on a timescale of the order of the typical duration of a Type I ELM period (≈0.1-0.4 ms). The ELM-induced radiation is always higher at the inner than at the outer divertor with an approximately linear increase of the asymmetry up to a total ΔWELM of about 0.6 MJ and a decrease for higher ΔWELM. Large Type I ELMs with energy losses above 0.65-0.7 MJ show enhanced radiation losses, which are associated with the ablation of thick co-deposited layers in the inner divertor. During the 'compound' phase, plasma contamination can increase but does not usually lead to radiative collapse of the plasma. It is found that the radiation distribution during the transient events is poloidally asymmetric with a maximum of the observed 'radiation peaking factor' for the disruptive current quench and for MARFEs of about 4.5, and less than 5 during VDEs.

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SN - 0022-3115

VL - 390-391

SP - 830

EP - 834

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

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ER -

Plasma radiation distribution and radiation loads onto the vessel during transient events in JET

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