Elucidating plasma dynamics in Hasegawa-Wakatani turbulence by information geometry
Journal article, 2020

The impact of adiabatic electrons on drift-wave turbulence, modeled by the Hasegawa-Wakatani equations, is studied using information length. Information length is a novel theoretical method for measuring distances between statistical states represented by different probability distribution functions (PDFs) along the path of a system and represents the total number of statistically different states that a system evolves through in time. Specifically, the time-dependent PDFs of turbulent fluctuations for a given adiabatic index A are computed. The changes in fluctuation statistics are then quantified in time by using information length. The numerical results provide time traces exhibiting intermittent plasma dynamics, and such behavior is identified by a rapid change in the information length. The effects of A are discussed.

Plasma diagnostics

Distribution functions




Johan Anderson

Chalmers, Space, Earth and Environment

Eun Jin Kim

University of Sheffield

Coventry University

Bogdan Hnat

The University of Warwick

T Rafiq

Lehigh University

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 27 2 022307

Subject Categories

Transport Systems and Logistics

Other Physics Topics

Probability Theory and Statistics



More information

Latest update