A Concept of Cross-Ferroic Plasma Turbulence

The variety of scalar and vector fields in laboratory and nature plasmas is formed by plasma turbulence. Drift-wave fluctuations, driven by density gradients in magnetized plasmas, are known to relax the density gradient while they can generate flows. On the other hand, the sheared flow in the direc...

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Bibliographic Details
Published in:Scientific reports 2016-02, Vol.6 (1), p.22189-22189, Article 22189
Main Authors: Inagaki, S., Kobayashi, T., Kosuga, Y., Itoh, S.-I., Mitsuzono, T., Nagashima, Y., Arakawa, H., Yamada, T., Miwa, Y., Kasuya, N., Sasaki, M., Lesur, M., Fujisawa, A., Itoh, K.
Format: Article
Language:English
Subjects:
639/766/189
639/766/1960/1136
639/766/530/2803
Density gradients
Fluctuations
Humanities and Social Sciences
Laboratories
Magnetic fields
multidisciplinary
Plasma
Science
Turbulence
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Summary:The variety of scalar and vector fields in laboratory and nature plasmas is formed by plasma turbulence. Drift-wave fluctuations, driven by density gradients in magnetized plasmas, are known to relax the density gradient while they can generate flows. On the other hand, the sheared flow in the direction of magnetic fields causes Kelvin-Helmholtz type instabilities, which mix particle and momentum. These different types of fluctuations coexist in laboratory and nature, so that the multiple mechanisms for structural formation exist in extremely non-equilibrium plasmas. Here we report the discovery of a new order in plasma turbulence, in which chained structure formation is realized by cross-interaction between inhomogeneities of scalar and vector fields. The concept of cross-ferroic turbulence is developed and the causal relation in the multiple mechanisms behind structural formation is identified, by measuring the relaxation rate and dissipation power caused by the complex turbulence-driven flux.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep22189