Kiel 2011 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Poster: Theorie/Simulation dichter und stark gekoppelter Plasmen

P 18.22: Poster

Mittwoch, 30. März 2011, 16:30–18:30, Foyer

Ionization and electron scattering on ions in strong electromagnetic fields — •Christopher Hinz, Sebastian Bauch, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstraße 15, D-24098 Kiel

The field of time-resolved measurements on ultrashort timescales has evolved rapidly in recent years[1] giving access to the complex electron dynamics in strong external fields. Among those, one fundamental process is electron-ion scattering in the presence of strong electromagnetic fields, leading to distributions of high-energy electrons[2]. Extending previous work on wave-packet scattering on fixed geometries of single ions and ion chains[3], which leads to significant increase in electron energies due to resonance effects, we present results for combinations of ions and atoms in a pump-probe setup. Here, one atom serves as an electron source through XUV excitation and the following IR induced acceleration leads to scattering on the parent ion as well as on neighbouring ions. The influence of several system parameters, such as pulse parameters, delay between both pulses and scattering geometries, is investigated by means of numerical solutions of the time-dependent Schrödinger equation. Physical insight is motivated by simple semiclassical estimations.
[1] see e.g. F. Krausz and M. Ivanov, Rev. Mod. Phys., 81 163 (2009);

[2] H.-J.Kull, and V. T. Tikhonchuk, Phys. Plas. 12 063301 (2005);

[3] S. Bauch and M. Bonitz,Contrib. Plas. Phys. 49 558 (2009)