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SuperXAS

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SuperXAS - X10DA

 
Person Position Email Phone
Maarten Nachtegaal Group leader maarten.nachtegaal@psi.ch +41 56 310 3056
Olga Safonova Scientist olga.safonova@psi.ch +41 56 310 5805
Adam Clark Scientist adam.clark@psi.ch +41 56 310 4151
Grigory Smolentsev Scientist grigory.smolentsev@psi.ch +41 56 310 5173
Urs Vogelsang Technician urs.vogelsang@psi.ch +41 56 310 3926
Stephan Hitz Technician stephan.hitz@psi.ch +41 56 310 2429

 

SuperXAS is a dedicated beamline for X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) with enhanced chemical sensitivity and time resolution. The beamline offers flexible sample environments for in situ studies of catalysts and other functional materials.

Experiment types:

  • XAS using ionization chambers for transmission detection and a 5-element or a thick sensor silicon drift detector (SDD) for fluorescence detection
  • Quick scanning XAS (QEXAFS) using ionization chambers for transmission detection with ms to minute time resolution O.Mueller et al. J. Synchrotron Rad., 2016.
  • High resolution XES using von Hamos-type spectrometer (for time-resolved XES and RXES). J.Szlachetko et al. Rev.Sci.Inst.,2012. And by using a Johann-type spectrometer in combination with a SDD detector (for valence-to-core XES). E.Kleymenov et al. Rev.Sci.Inst.,2011.
  • Pump-sequential-probes XAS in the time range 30ns-100 µs. G.Smolentsev et al. Farad. Diss., 2014 pump-flow-probe XAS in the time range 50 µs – 1ms. G.Smolentsev et al. JPCC, 2013 and time-resolved measurements in the fluorescence mode with 20ms resolution. Several laser systems are available laser
  • Combined operando SAXS and XAFS measurements. M. Povia et al. ACS Catalysis, 2018
  • Operando sulfur speciation by non-resonant XES and a special operando cell. D. Kuzmenko et al.

 

Energy range 4.5 - 35 keV
Flux on sample 1 x 1012 ph/s at 12 keV
Spot size on sample± 100 x 100 µm2 to 5 x 0.5 mm2
Intrinsic energy resolution (ΔE/E) 2.0 x 10-4 for Si(111)
0.5 x 10-4 for Si(311)

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