Ion-temperature-gradient-driven instability and anomalous ion heating in reversed-field pinches

S.C. Guo, R. Paccagnella, F. Romanelli

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Abstract

A possible mechanism is suggested for direct ion heating in reversed-field pinches (RFP). The ion temperature gradient mode induces collisionless ion perpendicular viscosity which damps the velocity fluctuations associated with resistive magnetohydrodynamic (MHD) mode activity. It is found that the growth rate of the ηiinstability is much larger than that in a tokamak, because the effects of both bad magnetic curvature and negative compressibility are enhanced in a RFP configuration. The anomalous perpendicular viscosity coefficient is estimated from the mixing length argument and the corresponding ion heating power due to viscous dissipation is found sufficient to balance the ion conductive losses. © 1994 American Institute of Physics.
Original languageEnglish
Pages (from-to)2741 - 2747
Number of pages7
JournalPhysics of Plasmas
Volume1
Issue number8
DOIs
Publication statusPublished - 1994
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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