Figure 7
CCD camera image and profile of the zeroth-order radiation measured at the focal point of the monochromated branches for a 3.2 eV photon energy setting of the undulator. A two-dimensional Gaussian fitting provides a FWHM size of 78 µm (V) × 203 µm (H). Optical densities and multilayer filters were used to avoid saturation and mixing with the spurious bending-magnet radiation. |