TY  - THES
A1  - Sturm, Felix Paul
T1  - Time resolved 3D momentum imaging spectroscopy with VUV-XUV pulse pairs
N2  - In this work, the complex structure of ionization and dissociation pathways on the potential energy curves in small molecules were investigated that are initiated by the absorption of a sequence of multi-color pulses in the XUV, VUV, and IR spectrum. Femtosecond pump-probe spectroscopy was used to track the evolution of nuclear dynamics in neutral hydrogen molecules. Previously unpublished excitation and ionization pathways leading to the dissociative ionization of hydrogen molecules were investigated by employing 3D momentum imaging spectroscopy. These studies were extended to oxygen molecules where an XUV attosecond pulse train coherently ionized several electronic states of O2+ followed by the dissociation of the molecule via multiple pathways. The infrared electric field of the driving laser was then used to couple the electronic and nuclear wave-packets, thus, manipulating the dissociation dynamics of the molecule on an attosecond time scale. 
In order to perform the experiments presented here, a novel experimental setup was developed and constructed. It combines an existing high-flux High Harmonic Generation light source that delivers attosecond pulse trains in the VUV and XUV spectrum with a state-of-the-art 3D momentum imaging apparatus (COLTRIMS), as well as a beamline consisting of several experimental tools enabling the selection, characterization, and propagation of the photon spectrum.

Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/39597
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-395979
ER  -