Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra

J. Mailloux; Y. Demers; V. Fuchs; M. Goniche; P. Jacquet; C. Boucher; A. Côté; C. Côté; J. Gunn; B. Terreault; P. Bibet; P. Froissard; D. Guilhem; J. H. Harris; G. Rey; M. Tareb

doi:10.1016/S0022-3115(96)00598-3

Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra

J. Mailloux, Y. Demers, V. Fuchs, M. Goniche, P. Jacquet, C. Boucher, A. Côté, C. Côté, J. Gunn, B. Terreault, P. Bibet, P. Froissard, D. Guilhem, J. H. Harris, G. Rey, M. Tareb

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Abstract

Strong toroidal asymmetries in power deposition during lower hybrid current drive experiments have been observed on TdeV and Tore Supra. These asymmetries are characterized by high heat loads on components magnetically connected to the LHCD antenna. The experimental results indicate that fast electrons generated by the rf fields in the scrape-off layer in front of the antenna are responsible for the localized heat loads. The rf power lost in the edge through this channel increases with both the edge density and the rf power level. In TdeV. the fraction of the injected power lost can exceed 10% at high power and high density, while it stays under 2% in Tore Supra. A simple model describing the trajectories of electrons in front of the antenna suggests that the high N_∥ components of the near field spectrum are responsible for the acceleration of the scrape-off layer electrons.

Original language	English
Pages (from-to)	745-749
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	241-243
DOIs	https://doi.org/10.1016/S0022-3115(96)00598-3
State	Published - Feb 11 1997
Externally published	Yes

Funding

The authors wish to thank T.E. Evans for helpful discussions. We are indebted to the staff of TdeV and Tore Supra for the operation of the machines and LHCD systems. The Centre Canadien de Fusion Magnrtique is supported by the government of Canada, Hydro-Qurbec, and INRS.

Funders	Funder number
Hydro-Qurbec
Institut national de la recherche scientifique
Government of Canada

Keywords

Energy deposition
Rf heating
SOL plasma
TdeV

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S0022-3115(96)00598-3

Cite this

Mailloux, J., Demers, Y., Fuchs, V., Goniche, M., Jacquet, P., Boucher, C., Côté, A., Côté, C., Gunn, J., Terreault, B., Bibet, P., Froissard, P., Guilhem, D., Harris, J. H., Rey, G., & Tareb, M. (1997). Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra. Journal of Nuclear Materials, 241-243, 745-749. https://doi.org/10.1016/S0022-3115(96)00598-3

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title = "Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra",

abstract = "Strong toroidal asymmetries in power deposition during lower hybrid current drive experiments have been observed on TdeV and Tore Supra. These asymmetries are characterized by high heat loads on components magnetically connected to the LHCD antenna. The experimental results indicate that fast electrons generated by the rf fields in the scrape-off layer in front of the antenna are responsible for the localized heat loads. The rf power lost in the edge through this channel increases with both the edge density and the rf power level. In TdeV. the fraction of the injected power lost can exceed 10% at high power and high density, while it stays under 2% in Tore Supra. A simple model describing the trajectories of electrons in front of the antenna suggests that the high N∥ components of the near field spectrum are responsible for the acceleration of the scrape-off layer electrons.",

keywords = "Energy deposition, Rf heating, SOL plasma, TdeV",

author = "J. Mailloux and Y. Demers and V. Fuchs and M. Goniche and P. Jacquet and C. Boucher and A. C{\^o}t{\'e} and C. C{\^o}t{\'e} and J. Gunn and B. Terreault and P. Bibet and P. Froissard and D. Guilhem and Harris, {J. H.} and G. Rey and M. Tareb",

year = "1997",

month = feb,

day = "11",

doi = "10.1016/S0022-3115(96)00598-3",

language = "English",

volume = "241-243",

pages = "745--749",

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Mailloux, J, Demers, Y, Fuchs, V, Goniche, M, Jacquet, P, Boucher, C, Côté, A, Côté, C, Gunn, J, Terreault, B, Bibet, P, Froissard, P, Guilhem, D, Harris, JH, Rey, G & Tareb, M 1997, 'Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra', Journal of Nuclear Materials, vol. 241-243, pp. 745-749. https://doi.org/10.1016/S0022-3115(96)00598-3

TY - JOUR

T1 - Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra

AU - Mailloux, J.

AU - Demers, Y.

AU - Fuchs, V.

AU - Goniche, M.

AU - Jacquet, P.

AU - Boucher, C.

AU - Côté, A.

AU - Côté, C.

AU - Gunn, J.

AU - Terreault, B.

AU - Bibet, P.

AU - Froissard, P.

AU - Guilhem, D.

AU - Harris, J. H.

AU - Rey, G.

AU - Tareb, M.

PY - 1997/2/11

Y1 - 1997/2/11

N2 - Strong toroidal asymmetries in power deposition during lower hybrid current drive experiments have been observed on TdeV and Tore Supra. These asymmetries are characterized by high heat loads on components magnetically connected to the LHCD antenna. The experimental results indicate that fast electrons generated by the rf fields in the scrape-off layer in front of the antenna are responsible for the localized heat loads. The rf power lost in the edge through this channel increases with both the edge density and the rf power level. In TdeV. the fraction of the injected power lost can exceed 10% at high power and high density, while it stays under 2% in Tore Supra. A simple model describing the trajectories of electrons in front of the antenna suggests that the high N∥ components of the near field spectrum are responsible for the acceleration of the scrape-off layer electrons.

AB - Strong toroidal asymmetries in power deposition during lower hybrid current drive experiments have been observed on TdeV and Tore Supra. These asymmetries are characterized by high heat loads on components magnetically connected to the LHCD antenna. The experimental results indicate that fast electrons generated by the rf fields in the scrape-off layer in front of the antenna are responsible for the localized heat loads. The rf power lost in the edge through this channel increases with both the edge density and the rf power level. In TdeV. the fraction of the injected power lost can exceed 10% at high power and high density, while it stays under 2% in Tore Supra. A simple model describing the trajectories of electrons in front of the antenna suggests that the high N∥ components of the near field spectrum are responsible for the acceleration of the scrape-off layer electrons.

KW - Energy deposition

KW - Rf heating

KW - SOL plasma

KW - TdeV

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DO - 10.1016/S0022-3115(96)00598-3

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SN - 0022-3115

VL - 241-243

SP - 745

EP - 749

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Strong toroidal asymmetries in power deposition on divertor and first wall components during LHCD on TdeV and Tore Supra

Abstract

Funding

Keywords

UN SDGs

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