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

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

18 Scopus citations

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 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.

Original language	English
Pages (from-to)	830-834
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	390-391
Issue number	1
DOIs	https://doi.org/10.1016/j.jnucmat.2009.01.219
State	Published - Jun 15 2009
Externally published	Yes

Funding

This work, supported by the European Communities under the contract of Association between EURATOM and FZJ, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
H2020 Euratom
Engineering and Physical Sciences Research Council	EP/G003955/1

Access to Document

10.1016/j.jnucmat.2009.01.219

Cite this

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{c469f17243c94d368fcbd0b719c14287,

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",

publisher = "Elsevier",

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, no. 1, pp. 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.

UR - http://www.scopus.com/inward/record.url?scp=67349223006&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2009.01.219

DO - 10.1016/j.jnucmat.2009.01.219

M3 - Article

AN - SCOPUS:67349223006

SN - 0022-3115

VL - 390-391

SP - 830

EP - 834

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1

ER -

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

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this