Monte Carlo simulations of the heat load asymmetries on JET divertor plates

Taina Kurki-Suonio, Timo Kiviniemi, Seppo Sipilä, Jukka Heikkinen, W. Fundamenski, G. Matthews, V. Riccardo

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

JET divertor load measurements using embedded thermocouples have indicated a large inner/outer target load asymmetry and a significant non-uniformity in the load to the outer target.
Furthermore, under H-mode conditions, the load appears to be dominated by the ion component. While the inner/outer target load asymmetry can be understood in terms of the conventional fluid picture, the sharp structures in the deposition profile as well as the ion dominance of the load cannot be readily explained by the fluid approach.
The guiding-centre orbit-following Monte Carlo code ASCOT is used to simulate the ion contribution to the target deposition profiles, and this is the first time a narrow structure in the divertor loads has been reproduced in simulations.
The importance of the plasma edge collisionality, the atomic, molecular and ionic collisions in the scrape-off layer, and the radial electric field both inside and outside the separatrix are all studied individually in detai
Original languageEnglish
Pages (from-to)725-732
JournalNuclear Fusion
Volume42
Issue number6
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

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asymmetry
heat
simulation
molecular collisions
ions
atomic collisions
fluids
thermocouples
profiles
ionic collisions
nonuniformity
orbits
electric fields

Cite this

Kurki-Suonio, T., Kiviniemi, T., Sipilä, S., Heikkinen, J., Fundamenski, W., Matthews, G., & Riccardo, V. (2002). Monte Carlo simulations of the heat load asymmetries on JET divertor plates. Nuclear Fusion, 42(6), 725-732. https://doi.org/10.1088/0029-5515/42/6/310
Kurki-Suonio, Taina ; Kiviniemi, Timo ; Sipilä, Seppo ; Heikkinen, Jukka ; Fundamenski, W. ; Matthews, G. ; Riccardo, V. / Monte Carlo simulations of the heat load asymmetries on JET divertor plates. In: Nuclear Fusion. 2002 ; Vol. 42, No. 6. pp. 725-732.
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Kurki-Suonio, T, Kiviniemi, T, Sipilä, S, Heikkinen, J, Fundamenski, W, Matthews, G & Riccardo, V 2002, 'Monte Carlo simulations of the heat load asymmetries on JET divertor plates', Nuclear Fusion, vol. 42, no. 6, pp. 725-732. https://doi.org/10.1088/0029-5515/42/6/310

Monte Carlo simulations of the heat load asymmetries on JET divertor plates. / Kurki-Suonio, Taina; Kiviniemi, Timo; Sipilä, Seppo; Heikkinen, Jukka; Fundamenski, W.; Matthews, G.; Riccardo, V.

In: Nuclear Fusion, Vol. 42, No. 6, 2002, p. 725-732.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Monte Carlo simulations of the heat load asymmetries on JET divertor plates

AU - Kurki-Suonio, Taina

AU - Kiviniemi, Timo

AU - Sipilä, Seppo

AU - Heikkinen, Jukka

AU - Fundamenski, W.

AU - Matthews, G.

AU - Riccardo, V.

PY - 2002

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AB - JET divertor load measurements using embedded thermocouples have indicated a large inner/outer target load asymmetry and a significant non-uniformity in the load to the outer target. Furthermore, under H-mode conditions, the load appears to be dominated by the ion component. While the inner/outer target load asymmetry can be understood in terms of the conventional fluid picture, the sharp structures in the deposition profile as well as the ion dominance of the load cannot be readily explained by the fluid approach. The guiding-centre orbit-following Monte Carlo code ASCOT is used to simulate the ion contribution to the target deposition profiles, and this is the first time a narrow structure in the divertor loads has been reproduced in simulations. The importance of the plasma edge collisionality, the atomic, molecular and ionic collisions in the scrape-off layer, and the radial electric field both inside and outside the separatrix are all studied individually in detai

U2 - 10.1088/0029-5515/42/6/310

DO - 10.1088/0029-5515/42/6/310

M3 - Article

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Kurki-Suonio T, Kiviniemi T, Sipilä S, Heikkinen J, Fundamenski W, Matthews G et al. Monte Carlo simulations of the heat load asymmetries on JET divertor plates. Nuclear Fusion. 2002;42(6):725-732. https://doi.org/10.1088/0029-5515/42/6/310