title: On the validity of the local diffusive paradigm in turbulent plasma transport.
abstract: A systematic, constructive and self-consistent procedure to quantify nonlocal, nondiffusive action at a distance in plasma turbulence is exposed and applied to turbulent heat fluxes computed from the state-of-the-art full- f, flux-driven gyrokinetic GYSELA and XGC1 codes. A striking commonality is found: heat transport below a dynamically selected mesoscale has the structure of a Lévy distribution, is strongly nonlocal, nondiffusive, scale-free, and avalanche mediated; at larger scales, we report the observation of a self-organized flow structure which we call the " E × B staircase" after its planetary analog.
authors.affiliation: Center for Astrophysics and Space Sciences, UCSD, La Jolla, CA 92093, USA. gdifpradalier@ucsd.edu
authors.forename: G
authors.initials: G
authors.lastname: Dif-Pradalier
authors.forename: P H
authors.initials: PH
authors.lastname: Diamond
authors.forename: V
authors.initials: V
authors.lastname: Grandgirard
authors.forename: Y
authors.initials: Y
authors.lastname: Sarazin
authors.forename: J
authors.initials: J
authors.lastname: Abiteboul
authors.forename: X
authors.initials: X
authors.lastname: Garbet
authors.forename: Ph
authors.initials: P
authors.lastname: Ghendrih
authors.forename: A
authors.initials: A
authors.lastname: Strugarek
authors.forename: S
authors.initials: S
authors.lastname: Ku
authors.forename: C S
authors.initials: CS
authors.lastname: Chang