nmTransmission NEXAFS

Saturation free and time resolved soft X-ray absorption on liquids and colloids for UE52-SGM and PM3

(a) Schematic top view of the experimental layout for static and time resolved NEXAFS measurements of liquid samples. (b) Thickness variation across a water flatjet based on the transmitted intensity

(a) Schematic top view of the experimental layout for static and time resolved NEXAFS measurements of liquid samples. (b) Thickness variation across a water flatjet based on the transmitted intensity


Methods

XMCD, NEXAFS, EXAFS, Time-resolved studies

Remote access

depends on experiment - please discuss with Instrument Scientist

Station data
Temperature range room temperature
Pressure range <10^-3 mbar
Detector GaAsP diode or APD
Manipulators -
Sample holder compatibility -
Additional equipment
Samples Thin liquid films
Assigned to beamline(s)
UE112_PGM-1 8 - 690 eV; for extreme values (<50 eV or >400 eV) contact the beamline crew
UE52_SGM 100 - 1500 eV
U125-2_NIM 6(4) - 40 eV
PM3 20 - 1900 eV
U49-2_PGM-1 85 - 1600 eV

End station for time-resolved and steady-state soft x-ray absorption spectroscopy (XAS/NEXAFS/XANES/EXAFS) in transmission on liquid samples. The liquid sample is continiously refreshed in a flatjet system. The transmitted intensity of synchrotron radiation for ground state NEXAFS is measured with a gallium arsenide (GaAs) photodiode. Here, the average diode current is recorded as a measure of transmitted intensity. For static measurements the full filling pattern of BESSY II is used. For time resolved measurement a MHz laser is incoupled to the end station. For time resolved studies an avalanche photo diode (APD) is used to separate the "single bunch" in the hybrid filling pattern of BESSY II. 

For details see: M. Fondell, S. Eckert, R. M. Jay, C. Weniger, W. Quevedo, J. Niskanen, B. Kennedy, F. Sorgenfrei, D. Shick, E. Giangrisostomi, R. Ovsyannikov, K. Adamzyk, N. Huse, P. Wernet, R. Mitzner, A. Föhlisch, "Time-resolved soft X-ray absorption spectroscopy in transmission mode onliquids at MHz repetition rates", Structural dynamicsRev. Sci. Instrum. 4, 054902 (2017).