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Dresden 2011 – scientific programme

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MO: Fachverband Molekülphysik

MO 35: Spectroscopy in He Droplets

MO 35.3: Talk

Friday, March 18, 2011, 11:00–11:15, MER 02

Doped Helium droplets: Velocity-map-imaging of ions in a pump-probe setup — •Andreas Kickermann1, Andreas Przystawik1, Lasse Schroedter1, Sven Toleikis1, Stefan Düsterer1, Harald Redlin1, Marion Harmand1, Andrew M. Ellis2, Marius Lewerenz3, Robert E. Zillich4, Klaus von Haeften2, and Tim Laarmann11Deutsches Elektronen-Synchrotron (DESY) Photon Science, Hamburg, Germany — 2University of Leicester, UK — 3Université Paris Est, Marne-la-Vallée, France — 4Johannes-Kepler-Universität, Linz, Austria

Helium nanodroplets have been proven to be excellent systems to study the properties of molecules and small compounds, which are embedded inside the droplets. Due to the ultra low temperature of the droplets the embedded particles are cooled down and can be studied isolated from the environment. We present a design of a velocity-map-imaging (VMI) spectrometer, that is integrated in a setup enabling pump-probe experiments with XUV-free electron lasers. Due to the high intensity and photon energy of such light sources the spectrometer has to be able to catch the ions created in a coulomb explosion without losing the angular information and the kinetic energy resolution. By temporal gating we are able to distinguish between different fragment ions, which will allow experiments on size-dependent ultrafast molecular dynamics in embedded Helium droplets.

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