Initial observations of the femtosecond timing jitter at the European XFEL Academic Article uri icon


  • Intense, ultrashort, and high-repetition-rate X-ray pulses, combined with a femtosecond optical laser, allow pump-probe experiments with fast data acquisition and femtosecond time resolution. However, the relative timing of the X-ray pulses and the optical laser pulses can be controlled only to a level of the intrinsic error of the instrument which, without characterization, limits the time resolution of experiments. This limitation inevitably calls for a precise determination of the relative arrival time, which can be used after measurement for sorting and tagging the experimental data to a much finer resolution than it can be controlled to. The observed root-mean-square timing jitter between the X-ray and the optical laser at the SPB/SFX instrument at European XFEL was 308 fs. This first measurement of timing jitter at the European XFEL provides an important step in realizing ultrafast experiments at this novel X-ray source. A method for determining the change in the complex refractive index of samples is also presented.


  • Kirkwood, Henry J
  • Letrun, Romain
  • Tanikawa, Takanori
  • Liu, Jia
  • Nakatsutsumi, Motoaki
  • Emons, Moritz
  • Jezynski, Tomasz
  • Palmer, Guido
  • Lederer, Max
  • Bean, Richard
  • Buck, Jens
  • Di Dio Cafisio, Samuele
  • Graceffa, Rita
  • Grünert, Jan
  • Göde, Sebastian
  • Höppner, Hauke
  • Kim, Yoonhee
  • Konopkova, Zuzana
  • Mills, Grant
  • Makita, Mikako
  • Pelka, Alexander
  • Preston, Thomas R
  • Sikorski, Marcin
  • Takem, Cedric MS
  • Giewekemeyer, Klaus
  • Chollet, Matthieu
  • Vagovic, Patrik
  • Chapman, Henry N
  • Mancuso, Adrian P
  • Sato, Tokushi

publication date

  • 2019

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