| Mean and Oscillating Plasma Flows and Turbulence Interactions across the L-H Confinement Transition. | |
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MedLine Citation:
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PMID: 21405471 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A complex interaction between turbulence driven E×B zonal flow oscillations, i.e., geodesic acoustic modes (GAMs), the turbulence, and mean equilibrium flows is observed during the low to high (L-H) plasma confinement mode transition in the ASDEX Upgrade tokamak. Below the L-H threshold at low densities a limit-cycle oscillation forms with competition between the turbulence level and the GAM flow shearing. At higher densities the cycle is diminished, while in the H mode the cycle duration becomes too short to sustain the GAM, which is replaced by large amplitude broadband flow perturbations. Initially GAM amplitude increases as the H-mode transition is approached, but is then suppressed in the H mode by enhanced mean flow shear. |
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Authors:
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G D Conway; C Angioni; F Ryter; P Sauter; J Vicente; |
Publication Detail:
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Type: Journal Article Date: 2011-02-08 |
Journal Detail:
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Title: Physical review letters Volume: 106 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-03-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 065001 Citation Subset: IM |
Affiliation:
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EURATOM-Association IPP, Max-Plank-Institut für Plasmaphysik, D-85748, Garching, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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