Table 2. Mirror parameters of the FlexPES beamline.
| M1 | M2 | M3a / M3b | M4a1 / M4a2 | M4b1 / M4b2 | |
|---|---|---|---|---|---|
| Shape | Cylindrical | Plane | Toroidal / toroidal | Toroidal / toroidal | Toroidal / toroidal |
| Deflection | Horizontal | Vertical | Horizontal / Horizontal | Horizontal / Horizontal | Horizontal / Horizontal |
| Distance (m) | 15 | Variable | 19 | 32.5 / 32.5 | 28 / 28 |
| Incidence angle (°) | 2 | 1–13 | 2 | 2 / 2 | 2 / 2 |
| Block size (mm) | 300 × 40 × 60 | 640 × 40 × 110 | 260 × 40 × 40 / 260 × 40 × 40 | 260 × 75 × 40 | 260 × 75 × 40 |
| Optical area (mm) | 280 × 20 | 640 × 40 | 240 × 20 | Two stripes of 240 × 20 | Two stripes of 240 × 20 |
| Substrate material | Si | Si | Si | ZERODUR | ZERODUR |
| Coating material | Au | Au | Au | Au / Au | Au / Au |
| Roughness (Å) | 3 | 3 | 3 | 5 / 5 | 5 / 5 |
| RMS slope error (tangential / sagittal) (arcsec) | 0.08 / <1 | 0.1 / 0.1 | 0.23 / <1 | 0.19 / <1 | 0.23 / <1 |
| 0.13 / <1 | 0.14 / <1 | 0.26 / <1 | |||
| RMS radii (tangential / sagittal) (mm) | ∞ / 1047 | ∞ / ∞ | 271278 / 698 | 107935 / 102 | 76410 / 70 |
| 238740 / 489 | 175101 / 143 | 114615 / 93 |