Figure 10
Temperature distribution (top) and thermal slope (bottom) at 20 keV. To achieve an efficient photon flux transmission at the second DCM crystal, the slope error on the first crystal should be a fraction of the rocking curve width, which for Si(111) at 20 keV is ∼14 µrad. Based on an integrated reflectivity of 70%, the allowable maximum slope error was calculated to be 4.5 µrad. About 65% of the optically active beam footprint has been shown to be below the 4.5 µrad slope error limit. |