L-mode radiative plasma edge studies for model validation in ASDEX Upgrade and JET

ASDEX Upgrade Team, JET-EFDA collaborators

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

The presently favoured option for reactor power handling combines metallic plasma-facing components and impurity seeding to achieve highly radiative scrape-off layer and divertor plasmas. It is uncertain whether tolerable divertor power loads will be obtained in this scenario, necessitating the development of predictive modelling tools. L-mode experiments with N2 seeding have been conducted at both ASDEX Upgrade and JET for benchmarking the critically important impurity radiation models in edge fluid codes. In both machines, particle and power loads are observed to first reduce at the inner target, and only then at the outer target. The outer divertor cools down with increasing N seeding rate, evolving from low-recycling conditions to a regime with peak temperature of 8–10 eV in both devices. First SOLPS5.0 simulations of N2 seeding in ASDEX Upgrade geometry show a similar in–out asymmetry in the effect of impurity radiation when drifts are activated in the simulations.
Original languageEnglish
Pages (from-to)S321-S325
Number of pages5
JournalJournal of Nuclear Materials
Volume438
Issue numberSupplement
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed
Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
Duration: 21 May 201225 May 2012

Fingerprint

inoculation
Impurities
Plasmas
impurities
Radiation
Facings
metallic plasmas
Benchmarking
power reactors
Recycling
radiation
recycling
Fluids
Geometry
simulation
asymmetry
fluids
geometry
Experiments
Temperature

Cite this

ASDEX Upgrade Team ; JET-EFDA collaborators. / L-mode radiative plasma edge studies for model validation in ASDEX Upgrade and JET. In: Journal of Nuclear Materials. 2013 ; Vol. 438, No. Supplement. pp. S321-S325.
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title = "L-mode radiative plasma edge studies for model validation in ASDEX Upgrade and JET",
abstract = "The presently favoured option for reactor power handling combines metallic plasma-facing components and impurity seeding to achieve highly radiative scrape-off layer and divertor plasmas. It is uncertain whether tolerable divertor power loads will be obtained in this scenario, necessitating the development of predictive modelling tools. L-mode experiments with N2 seeding have been conducted at both ASDEX Upgrade and JET for benchmarking the critically important impurity radiation models in edge fluid codes. In both machines, particle and power loads are observed to first reduce at the inner target, and only then at the outer target. The outer divertor cools down with increasing N seeding rate, evolving from low-recycling conditions to a regime with peak temperature of 8–10 eV in both devices. First SOLPS5.0 simulations of N2 seeding in ASDEX Upgrade geometry show a similar in–out asymmetry in the effect of impurity radiation when drifts are activated in the simulations.",
author = "Leena Aho-Mantila and M. Bernert and J.W. Coenen and R. Fischer and M. Lehnen and C. Lowry and S. Marsen and K. McCormick and H.W. M{\"u}ller and B. Sieglin and M.F. Stamp and M. Wischmeier and X. Bonnin and D.P. Coster and D. Reiter and S. Brezinsek and {ASDEX Upgrade Team} and {JET-EFDA collaborators}",
year = "2013",
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L-mode radiative plasma edge studies for model validation in ASDEX Upgrade and JET. / ASDEX Upgrade Team; JET-EFDA collaborators.

In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S321-S325.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - L-mode radiative plasma edge studies for model validation in ASDEX Upgrade and JET

AU - Aho-Mantila, Leena

AU - Bernert, M.

AU - Coenen, J.W.

AU - Fischer, R.

AU - Lehnen, M.

AU - Lowry, C.

AU - Marsen, S.

AU - McCormick, K.

AU - Müller, H.W.

AU - Sieglin, B.

AU - Stamp, M.F.

AU - Wischmeier, M.

AU - Bonnin, X.

AU - Coster, D.P.

AU - Reiter, D.

AU - Brezinsek, S.

AU - ASDEX Upgrade Team

AU - JET-EFDA collaborators

PY - 2013

Y1 - 2013

N2 - The presently favoured option for reactor power handling combines metallic plasma-facing components and impurity seeding to achieve highly radiative scrape-off layer and divertor plasmas. It is uncertain whether tolerable divertor power loads will be obtained in this scenario, necessitating the development of predictive modelling tools. L-mode experiments with N2 seeding have been conducted at both ASDEX Upgrade and JET for benchmarking the critically important impurity radiation models in edge fluid codes. In both machines, particle and power loads are observed to first reduce at the inner target, and only then at the outer target. The outer divertor cools down with increasing N seeding rate, evolving from low-recycling conditions to a regime with peak temperature of 8–10 eV in both devices. First SOLPS5.0 simulations of N2 seeding in ASDEX Upgrade geometry show a similar in–out asymmetry in the effect of impurity radiation when drifts are activated in the simulations.

AB - The presently favoured option for reactor power handling combines metallic plasma-facing components and impurity seeding to achieve highly radiative scrape-off layer and divertor plasmas. It is uncertain whether tolerable divertor power loads will be obtained in this scenario, necessitating the development of predictive modelling tools. L-mode experiments with N2 seeding have been conducted at both ASDEX Upgrade and JET for benchmarking the critically important impurity radiation models in edge fluid codes. In both machines, particle and power loads are observed to first reduce at the inner target, and only then at the outer target. The outer divertor cools down with increasing N seeding rate, evolving from low-recycling conditions to a regime with peak temperature of 8–10 eV in both devices. First SOLPS5.0 simulations of N2 seeding in ASDEX Upgrade geometry show a similar in–out asymmetry in the effect of impurity radiation when drifts are activated in the simulations.

U2 - 10.1016/j.jnucmat.2013.01.059

DO - 10.1016/j.jnucmat.2013.01.059

M3 - Article

VL - 438

SP - S321-S325

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - Supplement

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