Erlangen 2018 – scientific programme
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MO: Fachverband Molekülphysik
MO 22: Posters 3: Experimental and Theoretical Techniques and High Resolution Spectroscopy
MO 22.3: Poster
Thursday, March 8, 2018, 16:15–18:15, Zelt West
An electron UV/VIS-photon coincidence set-up using a magnetic bottle and a position sensitive photon detector — •Christian Ozga1, Gregor Hartmann1, Philipp Schmidt1, Clemens Richter2,3, Andreas Hans1, Uwe Hergenhahn3,4, Arno Ehresmann1, and André Knie1 — 1Institut für Physik und CINSaT, Universität Kassel,Heinrich-Plett-Straße 40, 34132 Kassel, Germany — 2Department of Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 3Leibniz Institute of Surface Modification (HZB-IOM Joint-Photonic Lab), Permoserstr. 15, 04318 Leipzig, Germany — 4Max Planck Institute for Plasma Physics, Wendelsteinstr. 1, 17491 Greifswald, Germany
Here we present a set-up for the detection of photons in the wavelength regime from 200 nm to 680 nm which are measured in coincidence with electrons having kinetic energies as low as 0.5 eV up to a few hundred eV using a magnetic bottle electron spectrometer. While the collection efficiency of the emitted electrons is drastically increased by this type of electron spectrometer it is also possible to use a set of mirrors and lenses to increase the solid angle for the photon collection resulting in a much higher efficiency of the coincidence measurement. Furthermore, the usage of lenses allows to guide the emitted photons which increases the flexibility and versatility of the photon detection. While this set-up can be used for the investigation of liquid samples, we demonstrate the feasibility of the experiment using the well-known Neon 1s photoexcitation as a proof-of-principle.