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Figure 8
Top: raw photoion momentum distributions, integrated projections (blue dots), fits (orange lines) and retrieved polarization angles (red lines) for linear polarizations generated at various anti-parallel undulator phases ϕap, showing examples over the range of undulator phases. Center: model for the polarization angle in the linear inclined mode (red line) overlaid with the measured values (circles) with residuals below. Bottom: model for the Stokes parameters in the linear inclined mode (solid lines) overlaid with the measured values (circles). |