Current-density fluctuations and ambipolarity of transport

W. Shen, R. N. Dexter, S. C. Prager

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The fluctuation in the plasma current density is measured in the MST reversed-field-pinch experiment. Such fluctuations, ad the measured radial profile of the k spectrum of magnetic fluctuations, support the view that low-frequency fluctuations (f<30 kHz) are tearing modes and high-frequency fluctuations (30 kHz<f<250 kHz) are localized turbulence in resonance with the local equilibrium magnetic field (i.e., kB=0). Correlation of current-density and magnetic fluctuations (jBr) demonstrates that radial particle transport from particle motion parallel to a fluctuating magnetic field is ambipolar over the full frequency range.

Original languageEnglish (US)
Pages (from-to)1319-1322
Number of pages4
JournalPhysical review letters
Volume68
Issue number9
DOIs
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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