Evidence of low-dimensional chaos in magnetized plasma turbulence

Details Evidence of low-dimensional chaos in magnetized plasma turbulence Evidence of low-dimensional chaos in magnetized plasma turbulence

2008-01-21

arxiv.org/abs/0801.3151v2

Physics

Plasma Physics

Scientific paper

10.1140/epjst/e2008-00841-5

We analyze probe data obtained from a toroidal magnetized plasma configuration suitable for studies of low-frequency gradient-driven instabilities. These instabilities give rise to field-aligned convection rolls analogous to Rayleigh-Benard cells in neutral fluids, and may theoretically develop similar routes to chaos. When using mean-field dimension analysis, we observe low dimensionality, but this could originate from either low-dimensional chaos, periodicity or quasi-periodicity. Therefore, we apply recurrence plot analysis as well as estimation of the largest Lyapunov exponent. These analyses provide evidence of low-dimensional chaos, in agreement with theoretical predictions.

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