Spatiotemporal mode structure of nonlinearly coupled drift wave modes

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.84.056405· OSTI ID:21612321

Brandt, Christian; Grulke, Olaf; Klinger, Thomas; Negrete, Jose Jr; Bousselin, Guillaume; Brochard, Frederic; Bonhomme, Gerard; Oldenbuerger, Stella ^[1]

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1. Max-Planck-Institut fuer Plasmaphysik, Wendelsteinstrasse 1, D-17489 Greifswald (Germany)

This paper presents full cross-section measurements of drift waves in the linear magnetized plasma of the Mirabelle device. Drift wave modes are studied in regimes of weakly developed turbulence. The drift wave modes develop azimuthal space-time structures of plasma density, plasma potential, and visible light fluctuations. A fast camera diagnostic is used to record visible light fluctuations of the plasma column in an azimuthal cross section with a temporal resolution of 10 {mu}s corresponding approximately to 10% of the typical drift wave period. Mode coupling and drift wave dispersion are studied by spatiotemporal Fourier decomposition of the camera frames. The observed coupling between modes is compared to calculations of nonlinearly coupled oscillators described by the Kuramoto model.

• OSTI ID: 21612321
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Vol. 84, Issue 5; Other Information: DOI: 10.1103/PhysRevE.84.056405; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CAMERAS
CROSS SECTIONS
DECOMPOSITION
FLUCTUATIONS
OSCILLATORS
PLASMA
PLASMA DENSITY
PLASMA POTENTIAL
SPACE-TIME
TURBULENCE
WAVE PROPAGATION
CHEMICAL REACTIONS
ELECTRIC POTENTIAL
ELECTRONIC EQUIPMENT
EQUIPMENT
VARIATIONS