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.
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February 2020
Research Article|
February 07 2020
Elucidating plasma dynamics in Hasegawa–Wakatani turbulence by information geometry
Johan Anderson
;
Johan Anderson
a)
1
Department of Earth and Space Sciences, Chalmers University of Technology
, SE-412 96 Göteborg, Sweden
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Eun-jin Kim
;
Eun-jin Kim
2
School of Mathematics and Statistics, University of Sheffield
, Sheffield S3 7RH, United Kingdom
and Fluid and Complex Systems Research Centre, Coventry University, Coventry
CV1 2TT, United Kingdom
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Bogdan Hnat;
Bogdan Hnat
3
Department of Physics, University of Warwick
, Coventry CV4 7AL, United Kingdom
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Tariq Rafiq
Tariq Rafiq
4
Department of Mechanical Engineering and Mechanics, Lehigh University
, Bethlehem, Pennsylvania 18015, USA
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a)
Electronic mail: anderson.johan@gmail.com
Phys. Plasmas 27, 022307 (2020)
Article history
Received:
August 01 2019
Accepted:
January 20 2020
Citation
Johan Anderson, Eun-jin Kim, Bogdan Hnat, Tariq Rafiq; Elucidating plasma dynamics in Hasegawa–Wakatani turbulence by information geometry. Phys. Plasmas 1 February 2020; 27 (2): 022307. https://doi.org/10.1063/1.5122865
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