Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster Session I
A 25.39: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
Characterizing the structure of pulsed rare gas cluster and helium nanodroplet sources — •Patrick Behrens1, Bruno Langbehn1, Fabian Seel1, Anatoli Ulmer1, Daniela Rupp1,2, and Thomas Möller1 — 1IOAP, Technische Universität Berlin — 2Max-Born-Institut Berlin
With XUV and X-ray free-electron lasers (FEL) delivering ultrashort intense light pulses, a detailed insight into the structure of nanoparticles such as viruses and macromolecules has become feasible. In this context, atomic clusters and helium nanodroplets enable novel experimental opportunities for fundamental research and imaging of nanospecimen [Tanyag et al., 2015, Struct. Dyn. 2],[Gorkhover et al., 2017, arXiv:1707.09424]. In particular, superfluid helium nanodroplets can serve as an ideal cooling matrix for spectroscopy.
The specific cluster source properties, e.g. stagnation pressure, temperature, valve opening time and distance between source and interaction region, play a crucial role in FEL spectroscopy as they directly determine the size, shape, distribution and density of the cluster beam.
In this presentation, we will discuss available methods to characterize these beam properties for different cluster sources.