**Table 1: **Summary of ray-tracing results. ${G}_{\text{geom}}$ is the gain calculated using the formula (22) or (25). ${A}_{\text{trace}}$ (${\text{mm}}^{2}$) and ${G}_{\text{trace}}$ are the geometric area and gain calculated from the ray-tracing. FWHM ($\mu $m) is the width of the line-spread or point-spread function. ${G}_{\text{Si}}$ is the gain calculated including the reflectivity of 1 keV X-rays from a Silicon surface (uncoated). ${G}_{\text{Au}}$ is the gain calculated including the reflectivity of 1 keV X-rays from a Gold surface (channel walls coated). |