Intermittent transport across the scrape-off layer: latest results from ASDEX Upgrade

0394782 - ÚFP 2014 RIV AT eng J - Journal Article
Kočan, M. - Müller, H.W. - Nold, B. - Lunt, T. - Adámek, Jiří - Allan, S.Y. - Bernert, M. - Conway, G.D. - de Marné, P. - Eich, T. - Elmore, S. - Gennrich, F.P. - Herrmann, A. - Horáček, Jan - Huang, Z. - Kallenbach, A. - Komm, Michael - Maraschek, M. - Mehlmann, F. - Müller, S. - Ribeiro, T.T. - Rohde, V. - Schrittwieser, R. - Scott, B. - Stroth, U. - Suttrop, W. - Wolfrum, E. … Total 28 authors
Intermittent transport across the scrape-off layer: latest results from ASDEX Upgrade.
Nuclear Fusion. Roč. 53, č. 7 (2013), 073047-073047. ISSN 0029-5515. E-ISSN 1741-4326
R&D Projects: GA MŠMT(CZ) LG11018; GA ČR(CZ) GAP205/12/2327; GA ČR GA202/09/1467
Institutional support: RVO:61389021
Keywords : ASDEX Upgrade scrape-off layer * plasma * tokamak * edge-localized mode (ELM)
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 3.243, year: 2013
http://iopscience.iop.org/0029-5515/53/7/073047/pdf/0029-5515_53_7_073047.pdf

We report the latest results of turbulence and transport studies in the ASDEX Upgrade scrape-off layer (SOL). Dissimilarity between the plasma and the floating potential fluctuations is studied experimentally and by gyrofluid simulations. Measurements by a retarding field analyser reveal that both, edge-localized mode (ELM) and turbulent filaments, convey hot ions over large radial distances in the SOL. The measured far SOL ELM ion temperature increases with the ELM energy, consistent with earlier observations that large ELMs deposit a large fraction of their energy outside the divertor. In the SOL, the ELM suppression by magnetic perturbations (MPs) results in lower ELM ion energy in the far SOL. At the same time, large filaments of ion saturation current are replaced by more continuous bursts. Splitting of the divertor strike zones observed by the infrared imaging in H-mode with MPs agree with predictions from the EMC3-Eirene simulations. This suggests that the `lobe`
Permanent Link: http://hdl.handle.net/11104/0222952