The Information Length Concept Applied to Plasma Turbulence
Artikel i vetenskaplig tidskrift, 2024

A methodology to study statistical properties of anomalous transport in fusion plasma is investigated. Three time traces generated by the full-f gyrokinetic code GKNET are analyzed for this purpose. The time traces consist of heat flux as a function of the radial position, which is studied in a novel manner using statistical methods. The simulation data exhibit transport processes with both medium and long correlation length along the radius. A typical example of a phenomenon with long correlation length is avalanches. In order to investigate the evolution of the turbulent state, two basic configurations are studied, one flux-driven and one gradient-driven with decaying turbulence. The information length concept in tandem with Boltzmann–Gibbs and Tsallis entropy is used in the investigation. It is found that the dynamical states in both flux-driven and gradient-driven cases are surprisingly similar, but the Tsallis entropy reveals differences between them. This indicates that the types of probability distribution function are nevertheless quite different since the higher moments are significantly different.

plasma turbulence

gyrokinetic simulations

information length

Tsallis entropy

Författare

Johan Anderson

Chalmers, Rymd-, geo- och miljövetenskap

Kenji Imadera

Sara Moradi

Nukleär teknik

Entropy

10994300 (eISSN)

Vol. 26 6 1-11 494

Fundament

Grundläggande vetenskaper

Ämneskategorier

Annan fysik

Fusion, plasma och rymdfysik

DOI

10.3390/e26060494

Mer information

Skapat

2024-06-05