Figure 7
Measured and calculated beam profile maps of the first and second harmonics. The measurement was made using the monochromator baffles placed about 1 m upstream from it. The undulator was tuned to give first harmonic at 50 eV photon energy, and the second harmonic was recorded at 100 eV. The theoretical maps were calculated with the SPECTRA software using realistic values for the light source, and the same number of bins/steps as in the experiments. |