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キーワード:
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要旨:
The observation of strong-field dynamics in atoms and molecules on ultra
short timescales has been of high interest for a long time. In recent years the
investigation of inner-shell electron dynamics became possible when strong
ultrashort lasers in the extreme ultra violet (XUV) became reality in the form
of free electron lasers (FEL). They allow for example the observation of charge
transfer processes in molecules.
In this spirit a measurement campaign was performed at FLASH (DESY), to
investigate such phenomena at halogenated hydrocarbon molecules. This thesis
describes the required further development of a transient absorption beam line
and the new design of essential components with regards to experiments with
corrosive targets and an FEL light source.
An intensity dependent absorption measurement of a doubly excited state
in helium was conducted as well. This can be considered an extension of
prior work performed recently with near infrared and visible (VIS) strongfield
modification of XUV absorption from lab-based HHG light source. The
measurement described in this work investigates XUV strong-field modification
of XUV absorption with partially coherent FEL light.
