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Fig. 4.


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Same as Figure 3, but for different parameters. From (A–F), the following indicator evolutions are respectively displayed: the kurtosis of the twist parameter κ(α), the direct current , the kurtosis of the horizontal magnetic field κ(B h ), the mean value of the shear angle , the time variation of the relative magnetic helicity dH m/dt and the mean value of the vertical magnetic field B z .

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