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ELM-induced cold pulse propagation in ASDEX Upgrade

Trier, E.; Wolfrum, E.; Willensdorfer, M.; Yu, Q.; Hoelzl, M.; Orain, F.; Ryter, F.; Angioni, C.; Bernert, M.; Dunne, M. G.; Denk, S. S.; Fuchs, J. C.; Fischer, R.; Hennequin, P.; Kurzan, B.; Mink, F.; Mlynek, A.; Odstrcil, T.; Schneider, P. A.; Stroth, U.; ... mehr

Abstract:
In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the plasma current are the main determining parameters for the inward penetration of the Te perturbations. With increasing plasma current the ELM penetration is more shallow in spite of the stronger ELMs. Estimates of the heat pulse diffusivity show that the corresponding transport is too large to be representative of the inter-ELM phase. Ergodization of the plasma edge during ELMs is a possible explanation for the observed properties of the cold pulse propagation, which is qualitatively consistent with non-linear magneto-hydro-dynamic simulations.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105025
Veröffentlicht am 15.01.2020
Originalveröffentlichung
DOI: 10.1088/1361-6587/aaf9c3
Scopus
Zitationen: 6
Web of Science
Zitationen: 5
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 0032-1028, 0368-3281, 0741-3335, 1361-6587, 1879-2979, 2057-7648
KITopen-ID: 1000105025
Erschienen in Plasma physics and controlled fusion
Verlag IOP Publishing
Band 61
Heft 4
Seiten Art. Nr.: 045003
Vorab online veröffentlicht am 15.02.2019
Schlagwörter ELMs, MHD instabilities, stochastic field, magnetic islands, cold pulse
Nachgewiesen in Dimensions
Web of Science
Scopus
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