Fundamental electron dynamics at the attosecond frontier and their direct coupling to structural dynamics of matter yield novel insights into the energy-distribution and protection mechanisms of Nature. The angular-streaking technique has exclusively demonstrated its capability of obtaining the full time-energy structure of XFEL pulses with attosecond resolution directly in the time-domain, thus enabling XFELs to study electron dynamics from element-specific vistas and their importance as onset of subsequent structural dynamics. We will present latest advances of this technique together with first results from the 2022 EuXFEL atto-campaign and the complementary prospects of the FLASH 2020+ innovation project at DESY.
We report a joint experimental and theoretical study of a three-sideband (3-SB) modification of the “reconstruction of attosecond beating by interference of two-photon transitions” (RABBIT) setup. The 3-SB RABBIT scheme allows to investigate phases resulting from the interference between transitions of different orders in the ionization continuum. The strength of this method is its ability to focus on the angle-dependent atomic phases only, independent of a possible spectral chirp of the exiting EUV fields. Furthermore, with a traditional 1-SB RABBITT scheme, we observe an asymmetry of the electron emission direction with respect to the proton after few-photon dissociation of molecular hydrogen and present sub-femtosecond control of this emission direction.
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