Time-resolved momentum imaging system for molecular dynamics studies using a tabletop ultrafast extreme-ultraviolet light source

Etienne Gagnon, Arvinder S. Sandhu, Ariel Paul, Kim Hagen, Achim Czasch, Till Jahnke, Predrag Ranitovic, C. Lewis Cocke, Barry Walker, Margaret M. Murnane, Henry C. Kapteyn

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Abstract

We describe a momentum imaging setup for direct time-resolved studies of ionization-induced molecular dynamics. This system uses a tabletop ultrafast extreme-ultraviolet (EUV) light source based on high harmonic upconversion of a femtosecond laser. The high photon energy (around 42 eV) allows access to inner-valence states of a variety of small molecules via single photon excitation, while the sub- -10-fs pulse duration makes it possible to follow the resulting dynamics in real time. To obtain a complete picture of molecular dynamics following EUV induced photofragmentation, we apply the versatile cold target recoil ion momentum spectroscopy reaction microscope technique, which makes use of coincident three-dimensional momentum imaging of fragments resulting from photoexcitation. This system is capable of pump-probe spectroscopy by using a combination of EUV and IR laser pulses with either beam as a pump or probe pulse. We report several experiments performed using this system.

Original languageEnglish (US)
Article number063102
JournalReview of Scientific Instruments
Volume79
Issue number6
DOIs
StatePublished - Jul 10 2008

ASJC Scopus subject areas

  • Instrumentation

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    Gagnon, E., Sandhu, A. S., Paul, A., Hagen, K., Czasch, A., Jahnke, T., Ranitovic, P., Cocke, C. L., Walker, B., Murnane, M. M., & Kapteyn, H. C. (2008). Time-resolved momentum imaging system for molecular dynamics studies using a tabletop ultrafast extreme-ultraviolet light source. Review of Scientific Instruments, 79(6), [063102]. https://doi.org/10.1063/1.2930869