Mode coupling studies in the RFX-mod reversed field pinch

A. Pizzimenti, R. Paccagnella

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Abstract

In this paper a linear model is presented and used to interpret the active applications of an external static or rotating poloidally symmetric perturbation to a reversed field pinch plasma. The plasma response is evaluated considering also the sidebands generated by the current distribution produced by the coils. We evaluate the plasma response, obtaining information about mode coupling. In 'quasi-single helicity' states - in contrast to 'multiple helicity' cases - the non-linear interaction between m = 1 dominant core-resonant modes seems not to adequately explain the (0, 1) mode evolution. Implications for the plasma dynamo mechanisms are accordingly deduced and discussed in comparison with previous findings, and mainly, we conclude that the (0, 1) mode could be an important factor in the torque balance rather than as an active dynamo driver. © 2008 IOP Publishing Ltd.
Original languageEnglish
Article number065006
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume50
Issue number6
DOIs
Publication statusPublished - 1 Jun 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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