Experimental setup used for the pump-probe NEXAFS spectroscopy measurements. The sample chamber is equipped with a cryostat cooling system based on liquid nitrogen.
Long term stability of the plasma intensity (f = 1 Hz). Each data point represents the total integrated intensity of 60 krypton spectra (i.e., 1 min).
NEXAFS spectrum of Pr0.7Ca0.3MnO3 (PCMO) in the water-window region and the section of the oxygen absorption K edge (inset). As can be seen, each element of PCMO has an absorption edge in the water-window. The nitrogen K edge derives from the Si3N4 sample window.
Static NEXAFS spectra of the oxygen K edge of non-excited PCMO (blue squares) and excited PCMO (red triangles).
Relative change in the absorption of the oxygen K edge as a function of the pulse delay at 530 eV due to the photo-induced phase transition. The solid line between time zero and 0.7 ns is an exponential fit of the data points, which yields the temporal resolution of the setup.
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