Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 22: Poster – Attosecond Physics

A 22.1: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Towards attosecond temporal resolution with split-and-delay units at FLASH — •Matthias Dreimann, Michael Wöstmann, Tobias Reiker, Victor Kärcher, and Helmut Zacharias — Center for Soft Nanoscience, Universität Münster, Germany

The development of ultrashort FEL pulses with few-fs and sub-fs pulses is a research field in the FEL community with promising applications. One of these applications are pump/probe experiments with ultrashort FEL pulses, as the temporal dynamic of the system is a key to the fundamental understanding of its underlying physics. Split-and-delay units have extensively contributed in this type of experiments, typically providing 'jitterless' temporal resolution in the range of some hundred attoseconds. Considering the sub-femtosecond pulse duration of recent ultrashort pulses a further improvement of the temporal resolution is mandatory.In this contribution we propose methods to improve the temporal resolution of split-and-delay units down to some attoseconds.

Keywords: Pump-probe; soft X-ray; Free-electron laser