nm liquid film Absorption
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).
|Temperature range||room temperature|
|Pressure Range||<10^-3 mbar|
|Detector||GaAsP diode or APD|
|Sample holder compatibility||-|
|Samples||Thin liquid films|