Figure 16

Results (D). The poloidal flux contour lines (left) and the 16 coil currents (right) in Ampère turns for the solutions of the optimal control problem (16) with objective and regularization functional \({C}(\mathbf {y};\mathbf {x}_{0}):= {C}_{2}(\psi ^{\mathrm{in}},\mathbf {x}_{0})\) and \(R(\mathbf {u}) = 10^{-15} \sum_{i=1}^{16} (I_{i}-I_{\mathrm{ref},i})^{2}\) for \(\mathbf {x}_{0} = (5.439, -4.168)\) and the currents of the fourth row in the table in Fig. 15 as the reference coil currents \(I_{\mathrm{ref},i}\). Here we found \(\lambda=1.580\times10^{6}\)