Figure 11
(a) Transient change in XAS in the Ni/Si3N4 sample as a function of photon energy for selected pulses in the train as given by the pulse range in the corresponding legend. The time delay was 0.5 ps, the laser fluence was 7 mJ cm−2, and the pump wavelength was 800 nm. The repetition rate of the 32 pulses during the FEL train was 280 kHz. (b) Integral of the absolute change in XAS as a function of the pulse number in the train, ranging from 1 to 32. The points are the measured data, while the lines are linear fits. |