3D effects on RWM physics in RFX-mod

M. Baruzzo, T. Bolzonella, S.C. Guo, Y.Q. Liu, G. Marchiori, R. Paccagnella, A. Soppelsa, F. Villone, Z.R. Wang

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Abstract

In this paper insights into the behaviour of resistive wall modes (RWMs) in the RFX-mod reversed field pinch device are given, with a focus on 3D issues in the characterization of the m spectrum of the mode and on the study of multi-harmonic coupling. In the first part of the paper the interaction between multiple unstable RWMs is studied and the presence of a coupling between different poloidal components of the most unstable RWM is demonstrated, taking advantage of the flexibility of the RFX-mod control system. In the second part of the work, the dependence of the growth rates of RWMs on a complete set of plasma parameters is studied in order to create a complete and homogeneous database, which permits a careful validation of stability codes. Finally, the experimental data are compared with the code predictions which take into account the 3D structure of conductors around the plasma. The different effects that modify the simple description, where unstable modes can be identified with single Fourier harmonics, appear to be explained by a mixture of toroidicity-induced and 3D eddy current effects. © 2011 IAEA, Vienna.
Original languageEnglish
Article number083037
Pages (from-to)-
JournalNuclear Fusion
Volume51
Issue number8
DOIs
Publication statusPublished - Aug 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Baruzzo, M., Bolzonella, T., Guo, S. C., Liu, Y. Q., Marchiori, G., Paccagnella, R., ... Wang, Z. R. (2011). 3D effects on RWM physics in RFX-mod. Nuclear Fusion, 51(8), -. [083037]. https://doi.org/10.1088/0029-5515/51/8/083037