A probe array for the investigation of spatio-temporal structures in drift wave turbulence

Journal Article · Mon May 01 00:00:00 EDT 1995 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1145490· OSTI ID:172040

Latten, A; Klinger, T; Piel, A ^[1]; Pierre, T ^[2]

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1. Institut fuer Experimentalphysik, Christian-Albrechts-Universitaet zu Kiel, Olshausenstrasse 40-60, D-24098 Kiel (Germany)
2. L.P.M.I., UA 835 du CNRS, Universite Henri Poincare, BP 239, F-54506 Vandoeuvre-les-Nancy Cedex (France)

A probe array with 64 azimuthally arranged Langmuir probes is presented as a new diagnostic tool for the investigation of drift waves. A parallel data acquisition system provides full spatio-temporal data of azimuthally propagating waves. For both regular and turbulent states of current-driven drift waves, the information provided by such space-time patterns is compared with results obtained from conventional two-point correlation methods. The probe array allows one to directly estimate the time-averaged wave number spectrum. In a turbulent state, the spectrum yields to a power law of {ital S}({ital k}){proportional_to}{ital k}{sup {minus}3.6{plus_minus}0.1}. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 172040
• Journal Information: Review of Scientific Instruments, Vol. 66, Issue 5; Other Information: PBD: May 1995
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
PLASMA DIAGNOSTICS
LANGMUIR PROBE
TURBULENCE
PLASMA WAVES
PLASMA DRIFT
SPACE-TIME