Results of single-shot temporal characterization of ultra-short XUV pulses generated by the free-electron laser FLASH will be presented. Using a THz field-driven streaking setup, the limits of this technique were investigated by employing different pulse durations from sub 10 fs to 350fs and different XUV wavelengths. Limits and possible error sources of the diagnostic method are discussed....
We probe the UV induced relaxation of the thionucleobase 2-thiouracil. This class of molecules shows an efficient and ultrafast relaxation into long-lived triplet states, contrasting with the ultrafast relaxation to the ground states observed in canonical nucleobases. This gives rise to interesting applications as photoinduced-cross linkers as well as problems related to its current use of...
