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Fig. 8

image

as a function of s/L for different times. s is the curvilinear coordinate of the poloidal field line on which max(Bϕ/Bp) is reached, and L the length of this field line. s = 0 locates the inner radius and s = L the equator. The parameters of the simulation are Lu = 245, ρc/ρ0 = 7 × 103, the differential rotation profile given by Eq. (12) and a stress-free boundary condition.

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