FemtoMAX performance
| FemtoMAX performance | Expected Fall 2021 | Achieved Dec 17, 2020 |
|---|---|---|
| Energy range | 1.8 -12 keV ( 1 – 6.5 Å) | 1.8 -12 keV ( 1 – 6.5 Å) |
| Photon source | In-vacuum undulator U15 | In-vacuum undulator U15 |
| Monochromator | Double crystal monochromator with Si(111) InSb(111) crystals. Multi-layer mirrors | Double crystal monochromator with Si(111) InSb(111) crystals. Multi-layer mirrors |
| Photons per pulse on sample1% BW | >2·10⁶ at 4 keV | >2·10⁶ at 4 keV |
| Repetition rate | 10 Hz | 10 Hz |
| Harmonic content | 1:1000 | 1:1000 |
| Bandwidth | Si ∆E/E≈2·10-4 (2.5-12 keV) InSb ∆E/E≈4·10⁻⁴ (1.8-12 keV) ML ∆E/E=0.01 (1.8-12 keV) | Si ∆E/E≈2·10-4 (2.5-12 keV) InSb |
| Monochomator throughput @ 5 keV | >70% crystal >50% ML | >70% crystal >50% ML |
| Optics | Unfocused/ Rhodium coated Si-mirror, Be-lenses, Harmonic rejection mirror | Unfocused/ Rhodium coated Si-mirror, Be-lenses, Harmonic rejection mirror |
| Polarization | Linear | Linear |
| Pulse duration | <250 fs | <250 fs |
| Synchronisation | <1 ps (may achieve jitter compensation <200 fs temporal resolution) | <1 ps (5 ps drift) (jitter compensation gives <500 fs temporal resolution) |
| Spot size on sample | 150 x 150 µm² | 150 x 150 µm² |
| Equipment | Ultrafast laser at sample (5 mJ @800 nm, 0.5 mJ at 1200 nm) Tilt platform Robot detector holder Vacuum GIXS | Ultrafast laser at sample (5 mJ @800 nm, 0.5 mJ at 1200 nm. Tilt platform, Robot detector holder Vacuum GIXS |