Hannover 2013 – scientific programme
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A: Fachverband Atomphysik
A 22: Poster: Interaction with strong or short laser pulses
A 22.12: Poster
Tuesday, March 19, 2013, 16:00–18:30, Empore Lichthof
Two-colour pump-probe experiments on single ionization of atoms in strong laser fields — •Andreas Krupp1, Lutz Fechner1, Nicolas Camus1, Thomas Pfeifer1, Joachim Ullrich1,2, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Physikalisch-Technische Bundesanstalt, Braunschweig
In order to study the ultra-fast dynamics of atoms and molecules we apply a two colour pump-probe scheme with intense (>1013 W/cm2) 25 fs laser pulses. After splitting the output of an amplified laser system at 800 nm central wavelength we sent one part into an optical parametric amplifier (OPA) to generate pulses in the wavelength range of 350 to 1300 nm. With these we induce dynamics probed after variable time delays with the 800 nm pulses. A Reaction Microscope (REMI) provides us with kinematically complete data. Results obtained in experiments on noble gases with single pulses from the OPA showed unexpected and pronounced target specific features in the electron momentum distributions especially in the low energy region (cf. poster A 158). The new setup can help to uncover the dynamics underlying these features.