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

Laggner, F. M.; Diallo, A.; Cavedon, M.; Kolemen, E.

doi:10.1016/j.nme.2019.02.030

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

Journal Article · Wed Apr 10 00:00:00 EDT 2019 · Nuclear Materials and Energy

DOI:https://doi.org/10.1016/j.nme.2019.02.030· OSTI ID:1511454

^[1]; Diallo, A. ^[2]; Cavedon, M. ^[3]; Kolemen, E. ^[4]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
Princeton Univ., NJ (United States)
Max Planck Inst. for Plasma Physics, Garching (Germany)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

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.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: DC-AC02-09Ch11466; SC0015878; SC0015480

OSTI ID:: 1511454

Journal Information:: Nuclear Materials and Energy, Vol. 19, Issue C; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 17 works

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