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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CG_6_6

Two-Pulse Control over Double Ionization Pathways in CO2

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Abstract

When an atom or a molecule interacts with a strong laser field multiple ionization may take place [1]. In this process the final ionic state may be reached via different pathways, which in the case of molecules may give rise to strongly different nuclear dynamics on the intermediately populated potential energy surfaces. We report on experiments that employ a sequence of two delayed pulses for controlling and visualizing the sequential double ionization pathway in CO2. In the experiments, we measured electrons and ions in coincidence from the ionization and dissociation of CO2 molecules using the COLTRIMS technique [2,3]. Measurements are done with two 795 nm, 25 fs laser pulses, with peak intensities of about 1×1014W/cm2 and 2×1014W/cm2, respectively. The time delay between the two pulses was varied in steps of 4 fs using a delay stage.

© 2015 IEEE

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