Pump-probe setups

Principal component of the instrument are versatile laser systems, efficient XAS data acquisition system and chamber for anaerobic measurements. 

Available laser systems include

-Femtosecond laser system based on Wyvern 500 laser amplifier from KM labs (Wavelength: 800 nm, SHG at 400nm, Repetition Rate: 50-150 kHz, Power: 8 W)

- Picosecond laser Duetto (Wavelengths: 1064 nm, 532 nm and 355 nm, Repetition rate up to 500 kHz)

- Nanosecond laser DS20HE-532 from Photonics Industries (Wavelengths: 532 nm, Repetition Rate: 10-150 kHz, Power: 30 W)

-Nanosecond laser IDOL  from XITON Photonics (wavelength 447 and 671 nm, Repetition rate 10-40 kHz, Power 1.5 W)

-CW laser from CNI (wavelength 447, Power 1.8W)

The chamber at SuperXAS beamline allows pump-probe measurements at anaerobic conditions. It allows to measure XAS spectra, XES spectra using von Hamos and Johann-type spectrometers.

The data acquisition system works in time-tagged photon counting mode, which allows to measure kinetics in the time range 30 ns -100 microseconds simultaneously with XAS spectra. Details about the setup can be found in the article:

  • Smolentsev G, Guda AA, Janousch M, Frieh C, Jud G, Zamponi F, et al.
    X-ray absorption spectroscopy with time-tagged photon counting: Application to study the structure of a Co(I) intermediate of H2 evolving photo-catalyst
    Faraday Discussions. 2014; 171: 259-273. https://doi.org/10.1039/c4fd00035h