Figure 4. Reconstruction of a nonlinear wakefield.

(a,b) are the reconstructed E_z and E_r fields respectively for a nonlinear wake. The corresponding probe density map is shown in Fig. 2(d). The simulated E_z and E_r fields are shown in (c,d), respectively. Axial lineouts of E_z are shown in (e), where the red solid line represents the reconstructed field and the blue solid line is for the simulated field. In (f,g), the transverse lineout of E_z and E_r are shown, with the same color definition as in (e).