Figure 9
Raster scan of the reflectance (double reflection) at a fixed grazing incidence angle of 0.814° over the central area of 17 plates. The reflectance remains constant at (a) 4 keV, but it varies at (b) 6 keV due to the slightly steeper angle of the lower plates having more influence at higher photon energies. The measurement positions on plates 33, 25 and 17 for the energy scans in Fig. 8 are indicated. |