Experimental evidence of mode coupling in drift wave intermittent turbulence using a wave number bicoherence analysis

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2402131· OSTI ID:20860429

Brochard, F; Windisch, T; Grulke, O; Klinger, T ^[1]

---

1. Max-Planck-Institute for Plasma Physics, EURATOM Association, D-17491 Greifswald (Germany)

Spatiotemporal mode coupling is studied experimentally in a cylindrical plasma device. For that purpose, a bicoherence analysis is applied to spatially resolved measurements of drift wave fluctuations in order to study nonlinear coupling in the wave number spectrum. The use of the k bicoherence is shown to be much more accurate and straightforward than one of the {omega} bicoherence, revealing bicoherence bursts with a characteristic duration shorter than the characteristic period of the signals. It is demonstrated that intermittent structures can be produced during these events.

• OSTI ID: 20860429
• Journal Information: Physics of Plasmas, Vol. 13, Issue 12; Other Information: DOI: 10.1063/1.2402131; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COUPLING
CYLINDRICAL CONFIGURATION
FLUCTUATIONS
LANGMUIR PROBE
NONLINEAR PROBLEMS
PLASMA
PLASMA DRIFT
PLASMA WAVES
THERMONUCLEAR DEVICES
TURBULENCE