Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade

Leena Aho-Mantila; X. Bonnin; D.P. Coster; C. Lowry; M. Wischmeier; S. Brezinsek; G. Federici; ASDEX Upgrade Team; JET-EFDA contributors

doi:10.1016/j.jnucmat.2014.11.049

Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade

Leena Aho-Mantila^*, X. Bonnin, D.P. Coster, C. Lowry, M. Wischmeier, S. Brezinsek, G. Federici, ASDEX Upgrade Team, JET-EFDA contributors

^*Corresponding author for this work

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

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Abstract

Effects of N-seeding in L-mode experiments in ASDEX Upgrade and JET are analysed numerically with the SOLPS5.0 code package. The modelling yields 3 qualitatively different radiative regimes with increasing N concentration, when initially attached outer divertor conditions are studied. The radiation pattern is observed to evolve asymmetrically, with radiation increasing first in the inner divertor, then in the outer divertor, and finally on closed field lines above the X-point. The properties of these radiative regimes are observed to be sensitive to cross-field drifts and they differ between the two devices. The modelled scaling of the divertor radiated power with the divertor neutral pressure is similar to an experimental scaling law for H-mode radiation. The same parametric dependencies are not observed in simulations without drifts.

Original language	English
Pages (from-to)	546-550
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.049
Publication status	Published - 2015
MoE publication type	A1 Journal article-refereed

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10.1016/j.jnucmat.2014.11.049

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@article{2b280912fb214c6db5f7ac1f7e53e21a,

title = "Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade",

abstract = "Effects of N-seeding in L-mode experiments in ASDEX Upgrade and JET are analysed numerically with the SOLPS5.0 code package. The modelling yields 3 qualitatively different radiative regimes with increasing N concentration, when initially attached outer divertor conditions are studied. The radiation pattern is observed to evolve asymmetrically, with radiation increasing first in the inner divertor, then in the outer divertor, and finally on closed field lines above the X-point. The properties of these radiative regimes are observed to be sensitive to cross-field drifts and they differ between the two devices. The modelled scaling of the divertor radiated power with the divertor neutral pressure is similar to an experimental scaling law for H-mode radiation. The same parametric dependencies are not observed in simulations without drifts.",

author = "Leena Aho-Mantila and X. Bonnin and D.P. Coster and C. Lowry and M. Wischmeier and S. Brezinsek and G. Federici and {ASDEX Upgrade Team} and {JET-EFDA contributors}",

year = "2015",

doi = "10.1016/j.jnucmat.2014.11.049",

language = "English",

volume = "463",

pages = "546--550",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade

AU - Aho-Mantila, Leena

AU - Bonnin, X.

AU - Coster, D.P.

AU - Lowry, C.

AU - Wischmeier, M.

AU - Brezinsek, S.

AU - Federici, G.

AU - ASDEX Upgrade Team

AU - JET-EFDA contributors

PY - 2015

Y1 - 2015

N2 - Effects of N-seeding in L-mode experiments in ASDEX Upgrade and JET are analysed numerically with the SOLPS5.0 code package. The modelling yields 3 qualitatively different radiative regimes with increasing N concentration, when initially attached outer divertor conditions are studied. The radiation pattern is observed to evolve asymmetrically, with radiation increasing first in the inner divertor, then in the outer divertor, and finally on closed field lines above the X-point. The properties of these radiative regimes are observed to be sensitive to cross-field drifts and they differ between the two devices. The modelled scaling of the divertor radiated power with the divertor neutral pressure is similar to an experimental scaling law for H-mode radiation. The same parametric dependencies are not observed in simulations without drifts.

AB - Effects of N-seeding in L-mode experiments in ASDEX Upgrade and JET are analysed numerically with the SOLPS5.0 code package. The modelling yields 3 qualitatively different radiative regimes with increasing N concentration, when initially attached outer divertor conditions are studied. The radiation pattern is observed to evolve asymmetrically, with radiation increasing first in the inner divertor, then in the outer divertor, and finally on closed field lines above the X-point. The properties of these radiative regimes are observed to be sensitive to cross-field drifts and they differ between the two devices. The modelled scaling of the divertor radiated power with the divertor neutral pressure is similar to an experimental scaling law for H-mode radiation. The same parametric dependencies are not observed in simulations without drifts.

U2 - 10.1016/j.jnucmat.2014.11.049

DO - 10.1016/j.jnucmat.2014.11.049

M3 - Article

SN - 0022-3115

VL - 463

SP - 546

EP - 550

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Model-based radiation scalings for the ITER-like divertors of JET and ASDEX Upgrade

Abstract

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