Nonlinear dynamics of kink‐tearing modes and their interaction with the current profiles in a reversed‐field pinch
1994
New insight in the nonlinear and quasilinear dynamics of kink‐tearing modes in reversed‐field pinches (RFP’s) is obtained by simultaneous measurements of the evolution of current profiles and associated m=1 helical mode spectra in the Extrap T1 RFP [Nucl. Fusion 34, 427 (1994)]. Results concerning near single helicity states, m=0 mediated m=1 spectral broadening and cascade, together with the associated relaxation dynamics, are reported. The role of phase locking, between the nonlinearly interacting modes, in the pinch dynamics is also discussed.
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