Fig. 6: Three-wave coupling between turbulence and the neoclassical tearing mode (NTM). | Nature Communications

Fig. 6: Three-wave coupling between turbulence and the neoclassical tearing mode (NTM).

From: Effects of plasma turbulence on the nonlinear evolution of magnetic island in tokamak

Fig. 6

a The power spectrogram of density fluctuations. b The n = 1 mode amplitude. c The sum of the squared bicoherence (\({b}_{{\rm{tot}}}^{2}\)) in the white dashed oval in (d), meaning the nonlinear coupling strength among the NTM fluctuation (f1) and density turbulence (f2 and f3). d The squared bicoherence of density fluctuations for t = 2.2475–2.2495 s.

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