Fig. 2: Experimental measurements of resonant X-ray emission yield and XFEL transmission. | Nature Communications

Fig. 2: Experimental measurements of resonant X-ray emission yield and XFEL transmission.

From: Probing ultrafast heating and ionization dynamics in solid density plasmas with time-resolved resonant X-ray absorption and emission

Fig. 2: Experimental measurements of resonant X-ray emission yield and XFEL transmission.The alternative text for this image may have been generated using AI.

a Experimentally measured time-resolved X-ray emission spectra covering the pump-probe delay ranging from −1 ps to 10 ps for a few selected shots. The light blue shaded region denotes the full spectral bandwidth of the XFEL beam centered at 8.2 keV. b Temporal evolution of resonant X-ray emission yield in the region of XFEL photon energy and normalized XFEL transmission. The stochastic fluctuation in XFEL transmission is primarily caused by X-ray spatial jitter, particularly evident at negative delays. c Correlation of the resonant X-ray emission yield and the XFEL transmission. The error bar of the pump-probe time delays assumes the relative timing uncertainty to be 200 fs for all the hot shots. The error of the spectrum is multiplied with a factor of 5 to make it visible on the figure. The background subtraction and selection of good shots are detailed in the Methods section.

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