Scaling of ELM crash parameters

A. F. Mink, E. Wolfrum, M. Hoelzl, M. Dunne, M. Maraschek, M. Cavedon, E. Trier, G. Harrer, B. Vanovac, A. Cathey, U. Stroth

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Introduction
Edge localized modes (ELMs) are periodically occurring instabilities that cause fast relaxations of the strong edge pressure gradient in the high-confinement regime (H-mode) of tokamak fusion plasmas [1]. These crashes induce intense heat fluxes towards the divertor tiles. This
is a major concern for future fusion devices like ITER [2]. To understand the nonlinear ELM dynamics, it is necessary to check the validity of the (potentially predictive) ELM models. This can be achieved by comparing modeling output to experimental results. One essential parameter for such a comparison is the structure of the ELM crash, i.e. the toroidal mode number n. Recent quantitative comparisons of n and other parameters of the ELM crash between the nonlinear code JOREK and results obtained on the ASDEX Upgrade tokamak (AUG) demonstrated the progress in understanding the ELM crash by nonlinear modeling [3]. Consequently, the next question that is tackled here is how the ELM characteristics change with peeling-ballooning critical parameters. We therefore introduce a database of 30 shots containing more than 2500 type-I ELM crashes on AUG and investigate how the structure size changes with plasma parameters, which enables a more detailed testing of the codes in the future.
LanguageEnglish
Title of host publication45th EPS Conference on Plasma Physics, EPS 2018
EditorsC. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, S. Weber
Place of PublicationMulhouse
PublisherEuropean Physical Society (EPS)
Pages633-636
Number of pages4
ISBN (Electronic)9781510868441
StatePublished - 1 Jan 2018
Event45th European Physical Society Conference on Plasma Physics, (EPS 2018) - Prague, Czech Republic
Duration: 2 Jul 20186 Jul 2018
https://eps2018.eli-beams.eu/en/

Conference

Conference45th European Physical Society Conference on Plasma Physics, (EPS 2018)
Abbreviated titleEPS 2018
CountryCzech Republic
CityPrague
Period2/07/186/07/18
Internet address

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crashes
scaling
fusion
peeling
tiles
pressure gradients
shot
heat flux

Cite this

Mink, A. F., Wolfrum, E., Hoelzl, M., Dunne, M., Maraschek, M., Cavedon, M., ... Stroth, U. (2018). Scaling of ELM crash parameters. In C. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, & S. Weber (Eds.), 45th EPS Conference on Plasma Physics, EPS 2018 (pp. 633-636). Mulhouse: European Physical Society (EPS).
Mink, A. F. ; Wolfrum, E. ; Hoelzl, M. ; Dunne, M. ; Maraschek, M. ; Cavedon, M. ; Trier, E. ; Harrer, G. ; Vanovac, B. ; Cathey, A. ; Stroth, U./ Scaling of ELM crash parameters. 45th EPS Conference on Plasma Physics, EPS 2018. editor / C. Michaut ; J. Berndt ; M. Mantsinen ; S. Coda ; G. Lapenta ; S. Weber. Mulhouse : European Physical Society (EPS), 2018. pp. 633-636
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abstract = "IntroductionEdge localized modes (ELMs) are periodically occurring instabilities that cause fast relaxations of the strong edge pressure gradient in the high-confinement regime (H-mode) of tokamak fusion plasmas [1]. These crashes induce intense heat fluxes towards the divertor tiles. Thisis a major concern for future fusion devices like ITER [2]. To understand the nonlinear ELM dynamics, it is necessary to check the validity of the (potentially predictive) ELM models. This can be achieved by comparing modeling output to experimental results. One essential parameter for such a comparison is the structure of the ELM crash, i.e. the toroidal mode number n. Recent quantitative comparisons of n and other parameters of the ELM crash between the nonlinear code JOREK and results obtained on the ASDEX Upgrade tokamak (AUG) demonstrated the progress in understanding the ELM crash by nonlinear modeling [3]. Consequently, the next question that is tackled here is how the ELM characteristics change with peeling-ballooning critical parameters. We therefore introduce a database of 30 shots containing more than 2500 type-I ELM crashes on AUG and investigate how the structure size changes with plasma parameters, which enables a more detailed testing of the codes in the future.",
author = "Mink, {A. F.} and E. Wolfrum and M. Hoelzl and M. Dunne and M. Maraschek and M. Cavedon and E. Trier and G. Harrer and B. Vanovac and A. Cathey and U. Stroth",
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Mink, AF, Wolfrum, E, Hoelzl, M, Dunne, M, Maraschek, M, Cavedon, M, Trier, E, Harrer, G, Vanovac, B, Cathey, A & Stroth, U 2018, Scaling of ELM crash parameters. in C Michaut, J Berndt, M Mantsinen, S Coda, G Lapenta & S Weber (eds), 45th EPS Conference on Plasma Physics, EPS 2018. European Physical Society (EPS), Mulhouse, pp. 633-636, 45th European Physical Society Conference on Plasma Physics, (EPS 2018), Prague, Czech Republic, 2/07/18.

Scaling of ELM crash parameters. / Mink, A. F.; Wolfrum, E.; Hoelzl, M.; Dunne, M.; Maraschek, M.; Cavedon, M.; Trier, E.; Harrer, G.; Vanovac, B.; Cathey, A.; Stroth, U.

45th EPS Conference on Plasma Physics, EPS 2018. ed. / C. Michaut; J. Berndt; M. Mantsinen; S. Coda; G. Lapenta; S. Weber. Mulhouse : European Physical Society (EPS), 2018. p. 633-636.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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T1 - Scaling of ELM crash parameters

AU - Mink,A. F.

AU - Wolfrum,E.

AU - Hoelzl,M.

AU - Dunne,M.

AU - Maraschek,M.

AU - Cavedon,M.

AU - Trier,E.

AU - Harrer,G.

AU - Vanovac,B.

AU - Cathey,A.

AU - Stroth,U.

PY - 2018/1/1

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N2 - IntroductionEdge localized modes (ELMs) are periodically occurring instabilities that cause fast relaxations of the strong edge pressure gradient in the high-confinement regime (H-mode) of tokamak fusion plasmas [1]. These crashes induce intense heat fluxes towards the divertor tiles. Thisis a major concern for future fusion devices like ITER [2]. To understand the nonlinear ELM dynamics, it is necessary to check the validity of the (potentially predictive) ELM models. This can be achieved by comparing modeling output to experimental results. One essential parameter for such a comparison is the structure of the ELM crash, i.e. the toroidal mode number n. Recent quantitative comparisons of n and other parameters of the ELM crash between the nonlinear code JOREK and results obtained on the ASDEX Upgrade tokamak (AUG) demonstrated the progress in understanding the ELM crash by nonlinear modeling [3]. Consequently, the next question that is tackled here is how the ELM characteristics change with peeling-ballooning critical parameters. We therefore introduce a database of 30 shots containing more than 2500 type-I ELM crashes on AUG and investigate how the structure size changes with plasma parameters, which enables a more detailed testing of the codes in the future.

AB - IntroductionEdge localized modes (ELMs) are periodically occurring instabilities that cause fast relaxations of the strong edge pressure gradient in the high-confinement regime (H-mode) of tokamak fusion plasmas [1]. These crashes induce intense heat fluxes towards the divertor tiles. Thisis a major concern for future fusion devices like ITER [2]. To understand the nonlinear ELM dynamics, it is necessary to check the validity of the (potentially predictive) ELM models. This can be achieved by comparing modeling output to experimental results. One essential parameter for such a comparison is the structure of the ELM crash, i.e. the toroidal mode number n. Recent quantitative comparisons of n and other parameters of the ELM crash between the nonlinear code JOREK and results obtained on the ASDEX Upgrade tokamak (AUG) demonstrated the progress in understanding the ELM crash by nonlinear modeling [3]. Consequently, the next question that is tackled here is how the ELM characteristics change with peeling-ballooning critical parameters. We therefore introduce a database of 30 shots containing more than 2500 type-I ELM crashes on AUG and investigate how the structure size changes with plasma parameters, which enables a more detailed testing of the codes in the future.

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M3 - Conference contribution

SP - 633

EP - 636

BT - 45th EPS Conference on Plasma Physics, EPS 2018

PB - European Physical Society (EPS)

CY - Mulhouse

ER -

Mink AF, Wolfrum E, Hoelzl M, Dunne M, Maraschek M, Cavedon M et al. Scaling of ELM crash parameters. In Michaut C, Berndt J, Mantsinen M, Coda S, Lapenta G, Weber S, editors, 45th EPS Conference on Plasma Physics, EPS 2018. Mulhouse: European Physical Society (EPS). 2018. p. 633-636.