Darmstadt 2008 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 12: Posters: Interaction with intense laser pulses

A 12.6: Poster

Dienstag, 11. März 2008, 16:30–18:30, Poster C3

Coulomb Scattering in Strong Laser Fields — •Sebastian Bauch and Michael Bonitz — Christian-Albrechts-Universität Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstraße 15, 24098 Kiel, Germany

Generating fast electrons from table top sources powered by strong laser systems is becoming an interesting tool for experimentalists. In most cases the effect of the wake field acceleration is used [1]. In our present work, we show an alternative way to generate distributions of highly energetic electrons accelerated by strong laser fields where the main processes takes place on the nanometer scale. We solve the multi dimensional time dependent Schrödinger equation on large spatial grids and show how electron wave packet scattering on Coulomb-like potentials (ions) in strong laser fields leads to resonance phenomena and distributions of fast electrons. In previous works [2] only one dimensional systems have been studied. We now demonstrate that carefully chosen scattering geometries and additional external electric fields allow to extend these results to realistic setups. In order to make predictions the angular resolved energy spectrum is analyzed.

[1] Th. Katsouleas, Nature 2004, Vol. 341 p. 516

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