Stuttgart 2012 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 14: Poster 2: Biomolecules, Electronic Spectroscopy, Experimental Techniques, Quantum Chemistry, Various Topics

MO 14.21: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.IV

Concentrated nanoparticle beams for optical and X-Ray spectroscopy — •Markus Eritt¹, Denis Duft², and Thomas Leisner^1,2 — ¹Institute for Environmental Physics, Ruprecht-Karls-University Heidelberg,Germany — ²Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT),Germany

Our setup provides free nanoparticles in a size range from 3 to 10 nm in diameter for spectroscopic investigations. Nanoparticles dispersed in a carrier gas and sampled from ambient air or a reservoir at pressures from 10 to 1000 mbar are transfered to UHV-conditions using an aerodynamic lens inlet. By concentrating the charged particles in an electrodynamic cage particle densities of up to 10E8 1/cm3 are reached. Cavity enhanced absorbtion spectroscopy is used for the determination of optical constants and time-of-flight spectroscopy in combination with an ulta-short-pulse laser system for mass determination. High density particle bunches extracted from the cage allow the application of core level photoelectron spectroscopy at synchrotron sources. In this contribution we will describe the setup and its function. The main perspective of this apparatus are observations on mesospheric processes (e.g. ice growth on nanometric seeds) under realistic atmospheric conditions.