Figure 6
(a) Single-crystal energy resolution as a function of the photon energy for (1) pure Si crystal in a divergent beam, (2) gradient crystal optimized for 10 keV, and (3) gradient crystal optimized for 20 keV. All calculations are for BESSY II dipole radiation. (b) Maximum spectral intensity gain for the optimum gradient for two crystal reflections, (111) and (220), and for a pure Si crystal with corresponding orientations. |