Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 35: Poster: Interaction with VUV and X-ray light

A 35.8: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Single-shot single-cluster measurements of large He nanodroplets irradiated by strong XUV laser pulses — •Bruno Langbehn, Leonie Flückiger, Jan P. Müller, Maria Müller, Yevheniy Ovcharenko, Daniela Rupp, Mario Sauppe, Anatoli Ulmer, and Thomas Möller — TU Berlin

With the advent of novel XUV light sources such as free electron lasers (FELs) imaging of non-periodic objects (nanoparticles, viruses and macromolecules) and studying their ultrafast ionization dynamics has become possible. Therefore a fundamental understanding of the interaction of short wavelength light pulses with matter can be obtained. In particular He clusters and nanodroplets can serve as model systems for studying ionization processes and plasma dynamics due to their simple electronic structure. When irradiated by intense FEL light, highly excited plasma states (far from ground state properties) will be generated and novel ionization channels can be explored.

In order to obtain single shot single cluster data, a He cluster beam will be set up using a pulsed Even-Lavie valve operating at temperatures down to 6 K with repetition rates up to 500 Hz. Large He nanodroplets (⟨ N⟩≥ 10⁶) will be generated using extreme nozzle geometries to record high quality scattering patterns as well as ion and electron spectra simultaneously in experiments at XUV-FELs such as FERMI and FLASH.