Tracking of non-repetitive processes with full field hard X-ray MHz rate single bunch imaging

We report on the successful observation of shockwave propagation in liquid media induced by the focused optical laser. Shockwave was generated by absorption of laser power in water mixed with Nile blue dye. The whole process was imaged by full-field propagation based hard X-ray imaging technique at MHz single bunch mode in ESRF ID19 beamline. We found the optimal parameters such as the laser power density shape of the water-air interface and concentration of dye, under which the fairly repeatable generation of the liquid jet has been achieved. The observed speed of jet was in excess of 126m/s, which makes such jet an interesting candidate for the sample delivery at European XFEL. Moreover, with the fine time tuning of the pump laser in the sheet capillary, we observed the evidence of the shockwave propagating at the speed ~1.5km/s. This work opens up possibilities for full field MHz imaging of non-repetitive processes at European XFEL, where due to better signal to noise ratio the quantitative imaging can be performed in micron- to nano-scale spatial resolution while simultaneously reaching time resolutions down to fs regio