Experimental evidence of a low-dimensional attractor in the coupling of drift- and ion-sound waves

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Phys Fluids B; (United States)

DOI:https://doi.org/10.1063/1.858993· OSTI ID:6266213

Stroehlein, G; Piel, A

The nonlinear coupling of drift waves with sound waves is studied in a magnetized plasma. The correlation dimension of the reconstructed phase space is determined by the Grassberger--Procaccia algorithm (Physica D 9, 189 (1983)) from various time series of a single variable. In the case of distinct Fourier modes low-dimensional attractors of D/sub 2/ = (3.9 +- 0.2) and D/sub 2/ = (4.8 +- 0.2) appear, whereas for broadband fluctuations a dimension of D/sub 2/>10 is found. Time-resolved Fourier spectra demonstrate that a four-wave interaction prevails, involving the drift wave, the sound wave, and the upper and lower sidebands of the drift wave. The number of essential modes is compared to the measured dimensions.

• Research Organization: Institut fuer Experimentalphysik II, Ruhr-Universitaet Bochum, Postfach 102148, 4630 Bochum 1, Federal Republic of Germany
• OSTI ID: 6266213
• Journal Information: Phys Fluids B; (United States), Journal Name: Phys Fluids B; (United States) Vol. 1:6; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALGORITHMS
CORRELATIONS
COUPLING
DRIFT INSTABILITY
FLUCTUATIONS
FOURIER ANALYSIS
INSTABILITY
ION ACOUSTIC WAVES
ION WAVES
MAGNETIZATION
MATHEMATICAL LOGIC
MATHEMATICAL SPACE
NONLINEAR PROBLEMS
PHASE SPACE
PLASMA
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA WAVES
SPACE
TURBULENCE
VARIATIONS