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We present a new endstation for the AMOLine of the ASTRID2 synchrotron atAarhus University, which combines a cluster and nanodroplet beam source with avelocity map imaging and time-of-flight spectrometer for coincidence imagingspectroscopy. Extreme-ultraviolet spectroscopy of free nanoparticles is apowerful tool for studying the photophysics and photochemistry of resonantlyexcited or ionized nanometer-sized condensed-phase systems. Here we demonstratethis capability by performing photoelectron-photoion coincidence (PEPICO)experiments with pure and doped superfluid helium nanodroplets. Differentdoping options and beam sources provide a versatile platform to generatevarious van der Waals clusters as well as He nanodroplets. We present adetailed characterization of the new setup and present examples of its use formeasuring high-resolution yield spectra of charged particles, time-of-flightion mass spectra, anion-cation coincidence spectra, multi-coincidence electronspectra and angular distributions. A particular focus of the research with thisnew endstation is on intermolecular charge and energy-transfer processes inheterogeneous nanosystems induced by valence-shell excitation and ionization.

A new endstation for extreme-ultraviolet spectroscopy of free clusters and nanodroplets