Table 1. Main specifications of the SAXS, USAXS, WAXS and XPCS detectors for 12.4 keV X-rays.
The spatial resolution (FWHM) was measured using a 20 µm attenuated beam and fitted to a Gaussian profile. The maximum counts of the CCD detectors are in analogue–digital units (ADU) per pixel. For the Eiger detectors, the PSF is roughly a boxcar function of width the same as the pixel size, and the indicated value is an analogous Gaussian FWHM.
| Eiger2 4M | Rayonix LX170 | FReLoN 4M | Eiger 500K | |
|---|---|---|---|---|
| (SAXS/USAXS) | (WAXS) | (SAXS/USAXS) | (SAXS/XPCS) | |
| Active area (mm × mm) | 155 × 163 | 85 × 170 | 50 × 50 | 77 × 39 |
| Pixel size (µm) | 75 | 44.17 | 23.8 | 75 |
| FWHM resolution (µm) | 52.5 ± 0.5 | 85.4 ± 1.6 | 44.3 ± 0.7 | 52.5 ± 0.5 |
| Dynamic range (photons mm−2) | 109 | 107 | 107 | 109 |
| Maximum counts | 107 s−1 | 65000 ADU | 60000 ADU | 107 s−1 |
| Dark noise | 0 | <1 photon | <0.2 photon | 0 |
| Frame rate (s−1) | 1000 (8 bit) | 8 (2 × 2 bin) | 2 (1×1 bin) | 23 000 (4 bit) |
| 500 (16 bit) | 100 (10 × 10 bin) | 7 (8 × 8 bin) | 7000 (12 bit) |