Rostock 2019 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Posters 3: Cluster, Strong Field Physics, and Experimental Techniques
MO 22.10: Poster
Thursday, March 14, 2019, 16:15–18:15, S Foyer LLM
Setup for photoelectron spectroscopy of metal clusters at FLASH — •Franklin Martinez1, Norman Iwe1, Klara Raspe1, Madlen Müller2, Josef Tiggesbäumker1, and Karl-Heinz Meiwes-Broer1 — 1Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock — 2Institut für Physik, Universität Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald
Photoelectron spectroscopy experiments at a free electron laser, e.g. FLASH in Hamburg, allow studying highly excited nanoscopic particles in the gas phase by means of core-level ionization. In the case of metal clusters, such experiments can study effects like core-hole screening which can indicate size-dependent changes in the binding character of such species. However, probing small, single-size selected clusters, for example, requires the preparation of a sufficiently high target density in the FEL interaction region. This condition is met by an experimental setup including a high-current cluster source, a radio-frequency ion trap and a dedicated interaction region. A newly designed interaction chamber provides a field-free environment for the operation of field-free electron spectrometers using time-of-flight or electrostatic deflection analyzers. The setup is completed by a high-resolution electron spectrometer designed and built at the group of Prof. v. Issendorff in Freiburg, and can also be supplemented by a wavelength spectrometer for FEL-radiation. The project is funded by the bmbf.