Figure 2
Flux density comparison at 8.500 keV and z = 20 mm downstream of the grating. In the upper panel is shown a crosscut profile of the counts per pixel recorded for the four-reflection geometry for a counting time of 120 s. In the lower panel a crosscut profile is shown for the two-reflection geometry for a counting time of 6 s. These data show that the flux density in the four-reflection geometry is 5% of that for the two-reflection geometry. |