A variety of experimental studies on pedestal localized fluctuations appearing in between crashes of edge localized modes (ELMs) across several tokamaks have been reviewed and summarized. The onset of the inter-ELM fluctuations is correlated with the evolution of the pedestal gradients. Three profile recovery phases are extracted, which are interlinked with the onsets of different kinds of pedestal fluctuations. Across machines it is found that the pedestal fluctuations can be assorted into at least three categories. These are determined by the fluctuation onset in the ELM cycle, observed frequency range and radial location in the pedestal. Further, the categories might be also related to different instabilities. Similar observations at various machines may point to a underlying generation mechanism that acts similarly for presently accessible pedestal parameter ranges.

Laggner, F., Diallo, A., Cavedon, M., Kolemen, E. (2019). Inter-ELM pedestal localized fluctuations in tokamaks: Summary of multi-machine observations. NUCLEAR MATERIALS AND ENERGY, 19, 479-486 [10.1016/j.nme.2019.02.030].

Inter-ELM pedestal localized fluctuations in tokamaks: Summary of multi-machine observations

Cavedon, M.;
2019

Abstract

A variety of experimental studies on pedestal localized fluctuations appearing in between crashes of edge localized modes (ELMs) across several tokamaks have been reviewed and summarized. The onset of the inter-ELM fluctuations is correlated with the evolution of the pedestal gradients. Three profile recovery phases are extracted, which are interlinked with the onsets of different kinds of pedestal fluctuations. Across machines it is found that the pedestal fluctuations can be assorted into at least three categories. These are determined by the fluctuation onset in the ELM cycle, observed frequency range and radial location in the pedestal. Further, the categories might be also related to different instabilities. Similar observations at various machines may point to a underlying generation mechanism that acts similarly for presently accessible pedestal parameter ranges.
Articolo in rivista - Articolo scientifico
Edge instabilities; Edge localized mode (ELM); High confinement mode (H-mode); Pedestal profiles; Plasma;
English
479
486
8
Laggner, F., Diallo, A., Cavedon, M., Kolemen, E. (2019). Inter-ELM pedestal localized fluctuations in tokamaks: Summary of multi-machine observations. NUCLEAR MATERIALS AND ENERGY, 19, 479-486 [10.1016/j.nme.2019.02.030].
Laggner, F; Diallo, A; Cavedon, M; Kolemen, E
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/354981
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