Inter-ELM pedestal localized fluctuations in tokamaks: Summary of multi-machine observations
Journal Article
·
· Nuclear Materials and Energy
- 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.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
- Grant/Contract Number:
- SC0015480; SC0015878
- OSTI ID:
- 1511454
- Journal Information:
- Nuclear Materials and Energy, Journal Name: Nuclear Materials and Energy Journal Issue: C Vol. 19; ISSN 2352-1791
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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