Studies on the response of resistive-wall modes to applied magnetic perturbations in the EXTRAP T2R reversed field pinch

D. Gregoratto, J.R. Drake, D. Yadikin, Y.Q. Liu, R. Paccagnella, P.R. Brunsell, T. Bolzonella, G. Marchiori, M. Cecconello

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Abstract

Arrays of magnetic coils and sensors in the EXTRAP T2R [P. R. Brunsell, Plasma Phys. Controlled Fusion 43 1457 (2001)] reversed-field pinch have been used to investigate the plasma response to an applied resonant magnetic perturbation in the range of the resistive-wall modes (RWMs). Measured RWM growth rates agree with predictions of a cylindrical ideal-plasma model. The linear growth of low- n marginally stable RWMs is related to the so-called resonant-field amplification due to a dominant ∫n∫ =2 machine error field of about 2 G. The dynamics of the m=1 RWMs interacting with the applied field produced by the coils can be accurately described by a two-pole system. Estimated poles and residues are given with sufficient accuracy by the cylindrical model with a thin continuous wall. © 2005 American Institute of Physics.
Original languageEnglish
Article number092510
Pages (from-to)1 - 11
Number of pages11
JournalPhysics of Plasmas
Volume12
Issue number9
DOIs
Publication statusPublished - Sep 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Gregoratto, D., Drake, J. R., Yadikin, D., Liu, Y. Q., Paccagnella, R., Brunsell, P. R., ... Cecconello, M. (2005). Studies on the response of resistive-wall modes to applied magnetic perturbations in the EXTRAP T2R reversed field pinch. Physics of Plasmas, 12(9), 1 - 11. [092510]. https://doi.org/10.1063/1.2061447