The reversed field pinch magnetohydrodynamics (MHD) is characterized by a broad spectrum of interacting resistive tearing modes with poloidal mode number mainly m = 0,1. According to the nonlinear coupling theory, the modes phase lock together if their amplitudes exceed a critical value. In the Reversed Field Pinch Experiment (RFX) [L. Fellin et al., Fusion Eng. Des. 25, 315 (1995)] they are always locked in phase, determining a global nonaxisymmetric magnetic perturbation. In this work a detailed experimental characterization of the magnetic perturbation is presented. The typical toroidal profiles and spectra, for both the m = 0 and the m = 1 components, are shown. In particular the phase relationship under locking conditions between the interacting m = 0,1 modes is investigated and compared with the theoretical predictions. The results of three-dimensional (3D) MHD numerical simulations are also discussed. © 2001 American Institute of Physics.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Zanca, P., Martines, E., Bolzonella, T., Cappello, S., Guo, S. C., Martin, P., ... Viterbo, M. (2001). Analysis of phase locking of tearing modes in reversed field pinch plasmas. Physics of Plasmas, 8(2), 516 - 524. https://doi.org/10.1063/1.1339835