Structure and dynamics of spontaneous and induced ELMs on ASDEX Upgrade
| العنوان: | Structure and dynamics of spontaneous and induced ELMs on ASDEX Upgrade |
|---|---|
| المؤلفون: | G. Kocsis, W. Suttrop, A. Schmid, R. Dux, Peter Lang, A. Kallenbach, M. Wischmeier, J. Harhausen, M. Tsalas, T. Eich, E. Wolfrum, B. Koch, A. Kirk, J. Neuhauser, M. Reich, D. P. Coster, L. D. Horton, H. D. Murmann, V. Rohde, R. Neu, H. W. Müller, V. Bobkov, L. Fattorini, M. Maraschek, A. Herrmann, B. Kurzan, S. Kalvin, M. Garcia-Munoz, A. V. Chankin |
| المساهمون: | ASDEX Upgrade Team |
| المصدر: | Nuclear Fusion Fusion Energy 2006 Nuclear Fusion, v.48 (2008) |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Nuclear and High Energy Physics, Pedestal, Materials science, Amplitude, ASDEX Upgrade, Extrapolation, Phase (waves), Magnetic confinement fusion, Edge (geometry), Atomic physics, Low frequency, Condensed Matter Physics, Computational physics |
| الوصف: | In order to assess the contribution of edge localized modes (ELMs) to plasma–wall interaction in future fusion experiments like ITER, a sound experimental database for model validation and extrapolation, and, to be prepared for the unfavourable case, the development of tools for ELM mitigation are required. On ASDEX Upgrade a large amount of experimental information has been accumulated from various diagnostics on the structure and dynamics of natural as well as pellet induced ELMs, and on related wall effects. In this paper a survey of type-I ELM results is given first and recent progress is then described in detail. In between ELMs, strong mode activity is observed in a wide mode number and frequency range, specifically large amplitude (∼20%) low frequency (several kilohertz) fluctuations. The initial dynamic ELM phase is dominated by the rapid growth of helical, low mode number structures rotating in the pedestalE×Bdirection, while the subsequent saturation and profile erosion phase is more complex and scenario dependent. Bursts of filaments ejected from the hot edge into the scrape-off layer are correlated with primary pedestal mode rotation. After partial edge profile collapse, a quiescent recovery phase is obtained despite substantial residual edge gradients. Pellet induced ELMs behave similarly to spontaneous ones, at least for the smallest pellets available so far. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69e30a58f2ecc6ae7dd3e0c3b3c08735 https://hdl.handle.net/11858/00-001M-0000-0026-FFB2-A11858/00-001M-0000-0026-FFB4-6 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....69e30a58f2ecc6ae7dd3e0c3b3c08735 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |