Figure 9
The double-diffracted beam intensity distribution on the focusing plane in a RDL with a beryllium lens. Shown are the cases corresponding to = 0 (a), = 1.5 × 10-4 (b), = −1.9 × 10-4 (c). The beam falls at the Bragg-corrected angle corresponding to the wave with = 0. Absorption in the lens is neglected. M = 1. Numerical integration by formula (76). Point source. |