The FemtoMAX experimental station supports x-ray scattering geometries (GIXS, SAXS, WAXS) in a vacuum/He/air environment. The experimental station is equipped with a Pilatus time-over-threshold photon counting detector (172 x 172 µm2 pixel size) allowing for counting up to 1000 photons per pulse in a single pixel. X-ray detectors are available directly mounted on GIXS chamber or on a robot arm. At the sample position we offer a set of wedges for x-ray incidence angles between 0-40 degrees to match Bragg condition. In horizontal direction scattering range limited to +/- 10 degrees. X-ray photon flux on sample is ~106-107 photons depending on chosen energy (ML monochromator, 1% BW). Vacuum < 10-7 mbar, < 2*10-6 mbar with Pilatus detector connected to vacuum.
Monochromators available for users are two double crystal monochromators (DCM) and three multi-layer mirrors (ML) within a range of 1.8-12 keV. X-ray focus at sample position is 80 µm (FWHM).
The experimental station offers a temperature-controlled sample environment between 20 K – 500 K for solid samples in a grazing angle geometry.
Ultrashort optical pulses (400 nm-1600 nm) and THz pulses generated in organic crystals are available for sample excitation. Peak excitation energies are 6 mJ (800 nm), 0.5 mJ (1200 nm) and 10 µJ (3 THz). The relative timing between the pump and probe pulses is measured with an 80 Gs, 36 GHz oscilloscope and can be post-sorted with an accuracy of 250 fs (FWHM).