Elucidating plasma dynamics in Hasegawa-Wakatani turbulence by information geometry

Abstract

The impact of adiabatic electrons on drift-wave turbulence, modelled 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. Specifically, the time-dependent PDFs of turbulent fluctuations for a given adiabatic index $A$ is 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 behaviour is identified by a rapid change in the information length. The effects of $A$ are discussed.

arXiv comment23 pages submitted to Physics of Plasmas. arXiv admin note: text overlap with arXiv:1706.02849

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Cited by in corpus (3)

• Time-dependent Probability Density Functions and Information Geometry in the Fusion L-H Transition
• Phase and amplitude evolution in the network of triadic interactions of the Hasegawa-Wakatani system
• A statistical analysis approach of plasma dynamics in gyrokinetic simulations of stellarator turbulence