Ion heating and magnetohydrodynamic dynamo fluctuations in the reversed-field pinch

DOI PDF 被引用文献3件
  • Earl Scime
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706
  • Miodrag Cekic
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706
  • D. J. Den Hartog
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706
  • Samuel Hokin
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706
  • D. J. Holly
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706
  • Christopher Watts
    Department of Physics, University of Wisconsin—Madison, Madison, Wisconsin 53706

書誌事項

公開日
1992-12-01
DOI
  • 10.1063/1.860313
公開者
AIP Publishing

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説明

<jats:p>Ion temperatures have been measured in the Madison Symmetric Torus (MST) [Dexter et al., Fusion Technol. 19, 131 (1991)] reversed-field pinch (RFP) with a five channel charge exchange analyzer. The characteristic anomalously high ion temperature of RFP discharges has been observed in the MST. The ion heating expected from ion–electron collisions is calculated and shown to be too small to explain the measured ion temperatures. The charge exchange determined ion temperature is also compared to measurements of the thermally broadened Cv 227.1 nm line. The ion temperature, Ti≊250 eV for I=360 kA, increases by more than 100% during discrete dynamo bursts in MST discharges. Magnetic field fluctuations in the range 0.5–5 MHz were also measured during the dynamo bursts. Structure in the fluctuation frequency spectrum at the ion cyclotron frequency suggests that the mechanism of ion heating involves the dissipation of dynamo fluctuations at ion cyclotron frequencies.</jats:p>

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