Magnetic configuration for the initial non-equilibrium state with homogeneous spine-aligned current, for the case with b = 1, j_sp = 1 and p₀ = 1, showing a) the 3D configuration with field lines above and below the fan in purple and orange, respectively. The fan plane is outlined in dashed black and the spine is represented in green, with projections onto the xz-plane and yz-plane (dashed green lines). In b), the field lines in the fan plane are plotted.