Figure 11
Focused beam profile of I15 VFM with (a) illumination of whole mirror and (b) illumination limited to central section, as taken by the in-house X-ray camera (Sutter et al., 2011). Both images are on the same scale, with the total height of each image equal to 1853 µm. Because the gravitational sag of this mirror was maladjusted at the time, a good focus could be obtained only by limiting the illuminated length of the mirror (see text). |