Hannover 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 42: Poster: Attosecond physics
A 42.4: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Generation of few-femtosecond monochromatized XUV-pulses for ultrafast pump-probe studies in gas and liquid phase — •Markus Kubin1, Martin Eckstein1, Fabio Frassetto2, Johan Hummert1, Kathrin Lange1, Luca Poletto2, Chung-Hsin Yang1, Julius Zielinski1, Marc Vrakking1, and Oleg Kornilov1 — 1Max-Born-Institut, Berlin — 2LUXOR, Padova, Italy
High harmonic generation (HHG) driven by femtosecond (fs) lasers provides ultrashort XUV pulses with a comb-like spectrum with photon energies reaching several keV. In combination with pump-probe VIS/XUV photoelectron and photoion spectroscopy it helps to follow chemical reactions in real time on fs- to attosecond-scales. However, the broad spectrum of HHG often launches dynamics on many potential energy surfaces and poses challenges for retrieving useful information from the spectra. In grating-based monochromators - used to narrow the spectrum of HHG sources - dispersion stretches the XUV pulses in time. Here we report on the implementation of a two-stage time-compensating monochromator to deliver XUV pulses with photon energies up to 50 eV and pulse durations around 10 fs. The setup allows for VIS/XUV pump-probe photoelectron and photoion spectroscopy in gas phase and condensed phase (employing the liquid micro-jet technique). The spectral and temporal performance of the system will be discussed in the context of IR-assisted ionization of rare gas atomic samples.