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Measurement of electron transport in the Madison Symmetric Torus reversed-field pinch (invited)

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10 Author(s)
Lanier, N.E. ; Department of Physics, University of Wisconsin–Madison, Madison, Wisconsin 53706 ; Craig, D. ; Anderson, J.K. ; Biewer, T.M.
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A recent study investigating the role of electron density fluctuations in particle transport has been conducted on the Madison Symmetric Torus reversed-field pinch. Four diagnostics enabled this experiment: a high-speed multichord far-infrared laser interferometer, a multichord array, a 64-position magnetic coil array, and a Doppler spectrometer that measured impurity ion flow fluctuations. Correlation analysis is used to elucidate the relationship among density, magnetic, and impurity ion flow fluctuations. We observe that the electron density fluctuations are highly coherent with the magnetic fluctuations resulting from core-resonant resistive tearing modes. Moreover, the fluctuation-induced particle transport, obtained from the correlation between electron density and flow fluctuations, indicates that the core-resonant tearing modes do not drive significant particle transport in the plasma edge. We will address these four primary diagnostics, details of the analysis techniques, and principal results from this study. © 2001 American Institute of Physics.

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Review of Scientific Instruments  (Volume:72 ,  Issue: 1 )