Appearance of the SB2 strong field simulation: logarithm of the density (background colour), mean poloidal magnetic field lines (black solid lines), Alfvén (red dotted line) and fast magneto-sonic (red dashed line) critical surfaces. The black dotted lines represent the end of the disk region defined in Fig. 14. The quantities are averaged between t₁ = 1719T_in and t₂ = 1910T_in with a resolution of Δt = 0.16T_in.