Rostock 2019 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 22: Posters 3: Cluster, Strong Field Physics, and Experimental Techniques

MO 22.11: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Foyer LLM

Photoelectron spectroscopy of size-selected clusters at free electron lasers — •Kariman Elshimi, Philipp Elsässer, Fabian Bär, Alex Ruf, and Bernd v. Issendorff — Physikalisches Institut Albert-Ludwigs Universität Freiburg

Investigation of small clusters using photoelectron spectroscopy at free electron lasers (FEL) not only will contribute to a better understanding of the electronic structure, and the resulting properties of nanoscale matter, but also will enable deep insights into the many-particle dynamics. Therefore, the aim of this project is to provide a specialized spectrometer system for studying the electronic structure and the dynamics of free mass-selected and temperature-controlled clusters at FEL. This system involves a high-resolution magnetic bottle type photoelectron spectrometer and an ion time-of-flight mass spectrometer. It is combined with an existing high-intensity magnetron cluster source and a low-temperature ion trap for cluster thermalization. The spectrometers are adapted to both the intense cluster beams as well as to the specific parameters imposed by the FEL. The whole machine is designed and built in a collaboration with the group of Prof. Meiwes-Broer in Rostock. One aspect of this development is the design and the construction of the magnetic bottle type photoelectron spectrometer based on experience gained in a similar experiment at FLASH. We present our newly constructed spectrometer including details about its unique features and results of recent measurements.