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要旨:
This work describes the setup of an experimental apparatus dedicated
for time-resolved momentum-spectroscopy of small quantum systems and the first
measurements conducted with it. The combination of the shortest currently available
laser pulses that last for a few 100 attoseconds only (1 as = 10-18 s) with a reactionmicroscope,a detector capable of the complete reconstruction of the momentum-vectorsof all charged particles that emerge from an ionization- or a dissociation-process, enablesprecise and detailed investigations of processes that occur in the electronic structure ofatoms and small molecules. The first measurements carrried out in the context of this
thesis were aimed at a complete characterization of the generated attosecond pulses.
Their duration was measured to be ~ 250 as, and the XUV-radiation is delivered in pulse
trains of ~30 separate pulses each. After the preparative experiments, a comparative
study of the photoelectron angular distributions following ionization by attosecond
pulses in an IR dressing field was carried out. In doing so, observations of previously
published results could be reproduced. In addition, our measurements present for
the first time detailled, energetically and angularly resolved data on the two-colour
photoionization of four noble gases, all taken under the same experimental conditions.
