Evidence for Global Edge–Core Interplay in Fusion Plasmas

Guilhem Dif-Pradalier (1) , Elisabetta Caschera (1) , Philippe Ghendrih (1) , Yuuichi Asahi (1) , Peter Donnel (1) , Xavier Garbet (1) , Virginie Grandgirard (1) , Guillaume Latu (1) , Claudia Norscini (1) , Yanick Sarazin (1)

1 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique

Large-scale reactor-relevant fusion plasmas are likely to operate near marginal stability. In this regime, we show clear evidence of interplay between core and edge regions of the plasma. This result illustrates aspects of the controversial 'shortfall problem' in the far-core, near-edge so-called 'No Man's Land' region and a possible route to resolve this issue. More generally, it emphasises global-scale organisation of turbulence and relevance of edge dynamics to core confinement.

Keywords: self-organisation; plasma turbulence; gyrokinetics

Domains: Plasma Physics [physics.plasm-ph]; Adaptation and Self-Organizing Systems [nlin.AO]

Guilhem Dif-Pradalier, Elisabetta Caschera, Philippe Ghendrih, Yuuichi Asahi, Peter Donnel, et al.. Evidence for Global Edge–Core Interplay in Fusion Plasmas. Plasma and Fusion Research, 2017, 12, pp.1203012. ⟨10.1585/pfr.12.1203012⟩. ⟨cea-01649988⟩