Feedback Stabilization of Multiple Resistive Wall Modes

P. R. Brunsell, D. Yadikin, D. Gregoratto, R. Paccagnella, T. Bolzonella, M. Cavinato, M. Cecconello, J. R. Drake, A. Luchetta, G. Manduchi, G. Marchiori, L. Marrelli, P. Martin, A. Masiello, F. Milani, S. Ortolani, G. Spizzo, and P. Zanca

Phys. Rev. Lett. 93, 225001 – Published 22 November 2004

Abstract

Active feedback stabilization of multiple independent resistive wall modes is experimentally demonstrated in a reversed-field pinch plasma. A reproducible simultaneous suppression of several nonresonant resistive wall modes is achieved. Coupling of different modes due to the limited number of the feedback coils is observed in agreement with theory. The feedback stabilization of nonresonant RWMs also has an effect on tearing modes that are resonant in the central plasma, leading to a significant prolongation of the discharge pulse.

Received 22 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.225001

Authors & Affiliations

P. R. Brunsell¹, D. Yadikin¹, D. Gregoratto², R. Paccagnella², T. Bolzonella², M. Cavinato², M. Cecconello¹, J. R. Drake¹, A. Luchetta², G. Manduchi², G. Marchiori², L. Marrelli², P. Martin², A. Masiello², F. Milani², S. Ortolani², G. Spizzo², and P. Zanca²

¹Division of Fusion Plasma Physics (Association EURATOM/VR), Alfvén Laboratory, Royal Institute of Technology, 10044 Stockholm, Sweden
²Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, 35127 Padova, Italy

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Vol. 93, Iss. 22 — 26 November 2004

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