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Author Jiang, Y. ♦ Brower, D. L. ♦ Lanier, N. E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ PLASMA DENSITY ♦ PLASMA DIAGNOSTICS ♦ INTERFEROMETRY ♦ CALIBRATION ♦ TURBULENCE ♦ ELECTRON DENSITY ♦ REVERSED-FIELD PINCH DEVICES ♦ ROTATION
Abstract As a consequence of recent improvements to the far-infrared (FIR) interferometer time response, from bandwidth of 10 kHz up to 1 MHz, high-frequency density fluctuations can now be resolved on the Madison symmetric torus (MST) reversed-field pinch. The phase measurement allows absolute calibration of the fluctuation amplitude while eleven chords generate information on the spatial distribution. Density fluctuations up to 200 kHz are observed. A unique feature of the MST interferometer is that six chords are toroidally displaced 5{degree} from the remaining five. Hence, besides information on the poloidal structure, i.e., m=1, toroidal information is also available. By computing the cross power, coherence, and cross phase between two toroidally displaced chords, one can determine the toroidal rotation speed, dispersion, and correlation length. {copyright} {ital 1999 American Institute of Physics.}
ISSN 00346748
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-01-01
Publisher Place United States
Journal Review of Scientific Instruments
Volume Number 70
Issue Number 1
Technical Publication No. CONF-980605-


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