Freiburg 2024 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 18: Poster: Cluster

MO 18.6: Poster

Mittwoch, 13. März 2024, 17:00–19:00, Tent C

Single-shot electron and ion coincidence spectroscopy of rare gas clusters. — •Frederic Ussling, Yves Acremann, Alessandro Colombo, Linos Hecht, Katharina Kolatzki, Mario Sauppe, José Gómez Torres, Alexandre Rosillo Vorsin, and Daniela Rupp — ETH Zurich, Laboratory for Solid State Physics, John-von-Neumann-Weg 9, 8093 Zurich, Switzerland

Intense short-wavelength pulses from free-electron lasers (FELs) or lab-based high harmonic generation (HHG) sources enable structural investigation of individual nanometre-sized specimens like viruses [1] or clusters [2] via diffraction imaging (CDI). The intense short-wavelength pulses lead to a highly ionized system followed by complex dynamics covering many different time scales. In this context, atomic and molecular clusters can serve as ideal model systems to study light-matter interaction on the nanoscale. Each interaction residual, such as ejected electrons or ions, gives insights into different processes inside the cluster: Direct electron measurement allows to probe (sub-)femtosecond dynamics, including ionization and nanoplasma formation [3]. Cluster dissociation dynamics, proceeding on longer timescales, can typically be studied via ion time-of-flight spectroscopy [3]. Consequently, the simultaneous measurement of ejected electrons and ions through coincidence spectroscopy is a powerful tool to study light-matter interaction. We present first tests towards single-shot electron and ion coincidence spectroscopy combined with CDI of large rare-gas clusters. [1] M. Seibert et al., Nature 470,(2011) [2] D. Rupp et al., Nat Commun 8, 493 (2017) [3] M. Arbeiter and T. Fennel, New J. Phys. 13 053022 (2011)

Keywords: High harmonic generation; Spectroscopy; Cluster; XUV; Coherent diffractive imaging