Review Article
Thin Shell, Segmented X-Ray Mirrors
Table 1
Foil mirror parameters.
| | SXS/Micro-X | BBXRT | SODART | ASCA | Astro-E/E2 SXT-I | Astro-E/E2 SXT-S |
| Number flown | 1 | 2 | 0 | 4 | 8 | 2 | Diameter (cm) | 40 | 40 | 60 | 35 | 40 | 40 | Focal length (m) | 2.1 | 3.77 | 8 | 3.5 | 4.75 | 4.5 | Number of Shells | 68 | 118 | 143 | 120 | 175 | 168 | Number of modules per mirror | 4 | 4 | 4 | 4 | 4 | 4 | Segment length (cm) | 10 | 10 | 20 | 10 | 10 | 10 | Total number of segments | 544 | 944 | 1144 | 960 | 1400 | 1344 | AI Substrate thickness (mm) | 0.127 | 0.127 | 0.4 | 0.127 | 0.152 | 0.152 | Surface production method | lacquer | lacquer | lacquer | lacquer | replication | replication | Reflective coating | gold | gold | gold | gold | gold | gold | Mass (kg) | 20 | 20 | 101 | 9.84 | 19.3 | 19.9 | Effective area at 1 keV (cm2) | 300 | 290 | 950 | 300 | 450 | 450 | Effective area at 7 keV (cm2) | — | 125 | 750 | 150 | 250 | 250 | Angular resolution (HPD-arcmin) | 3 | 3 | 2.4–3.8 | 3.6 | 1.6-1.7 | 1.7 | Year of launch | 1988 | 1990 | — | 1993 | 2000, 2005 | 2000, 2005 |
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