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.
Bibliographical noteThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Anderson, J, Kim, E, Hnat, B & Rafiq, T 2020, 'Elucidating plasma dynamics in Hasegawa-Wakatani turbulence by information geometry', Physics of Plasmas, vol. 27, no. 2, 022307 and may be found at https://dx.doi.org/10.1063/1.5122865
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FunderU.S. DOE Grants DE-SC0013977 and DE-FG02-92ER54141.
ASJC Scopus subject areas
- Condensed Matter Physics