Figure 15

Results (C). The poloidal flux contour lines (top) and the 16 coil currents (bottom) in Ampère turns for the solutions of the optimal control problem (16) with objective functional \({C}(\mathbf {y};1000,\mathbf {x}_{0})\) and \(\mathbf {x}_{0}= (5.02, -4.22)\), \((5.22, -4.42)\), \((5.42, -4.62)\), \((5.62, -4.82)\), \((5.82, -5.02)\) (from left to right) is indicated by the blue circle