Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Attosecond Physics II / Interaction with VUV and X-ray Light (joint session A/MO)
A 18.2: Vortrag
Mittwoch, 13. März 2024, 11:30–11:45, HS 1010
Investigation of Correlated Electronic Dynamics by Nonlinear Attosecond Spectroscopy — Samuel Kellerer1, Ioannis Makos1, •Dominik Schomas1, David Busto2, Dominik Ertel1, Robert Moshammer3, Claus Dieter Schröter3, Thomas Pfeifer3, Arjun Nayak4, Debobrata Rajak4, Naveed Ahmed4, Sourin Mukhopadhyay4, Tamás Csizmadia4, Balázs Nagyillés4, Zsolt Divéki4, Katalin Varjú4, Jörn Adamczewski-Musch5, Fabio Frassetto6, Luca Poletto6, Paraskevas Tzallas7, Dimitris Charalambidis7, and Giuseppe Sansone1 — 1Uni Freiburg — 2Uni Lund — 3MPIK Heidelberg — 4ELI ALPS Szeged — 5GSI Darmstadt — 6CNR-IFN Padova — 7IESL-FORTH Hellas
The investigation of ultrafast processes like electronic dynamics in small quantum systems demands for generation and control of laser pulses with durations comparable or even shorter than the timescale of the investigated processes. Combining an attosecond source and a photoelectron/photoion coincidence spectrometer offers the possibility to investigate in detail the photoionization process, returning information on the role played by electronic correlation in multiple ionization of atoms. Despite its conceptual simplicity, the study of the two-photon double-ionization process in helium presents formidable experimental challenges, which we plan to address using the intense attosecond pulses provided by the SYLOS laser system available at ELI ALPS. We will present the attosecond beamline and the photoelectron/photoion apparatus used as an end-station for coincidence spectroscopy as well as first results.
Keywords: Attosecond; ultrafast dynamics; electronic correlation; two-photon double-ionization; XUV