Figure 4
Beam intensity distributions along the (a) horizontal axis and (b) vertical axis. (a) Source-to-image distance 41.2 m; source-to-HFM1 distance 31.2 m; incidence 4 mrad. The smooth Gaussian profile results from the convolution with a broad source. (b) Source-to-focus distance 50.8 m; source-to-VFM1 distance 42.8 m; incidence 5 mrad. Note the presence of satellites characteristic of structured slope errors. |