Related Experiment Video
Updated: Jun 23, 2025

Total Internal Reflection Absorption Spectroscopy TIRAS for the Detection of Solvated Electrons at a Plasma-liquid Interface
Published on: January 24, 2018
The Information Length Concept Applied to Plasma Turbulence
Johan Anderson1, Kenji Imadera2, Sara Moradi3
1Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Göteborg, Sweden.
Abstract:
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.
Related Concept Videos
The Buckingham Pi Theorem
Laminar Flow
Traveling Waves: Lossless Lines
Poiseuille's Law and Reynolds Number
Reynolds Transport Theorem
Energy Conservation and Bernoulli's Equation
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...

