title: Time-resolved momentum imaging system for molecular dynamics studies using a tabletop ultrafast extreme-ultraviolet light source.
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.
authors.affiliation: JILA, University of Colorado at Boulder, Boulder, CO 80309-0440, USA.
authors.forename: Etienne
authors.initials: E
authors.lastname: Gagnon
authors.forename: Arvinder S
authors.initials: AS
authors.lastname: Sandhu
authors.forename: Ariel
authors.initials: A
authors.lastname: Paul
authors.forename: Kim
authors.initials: K
authors.lastname: Hagen
authors.forename: Achim
authors.initials: A
authors.lastname: Czasch
authors.forename: Till
authors.initials: T
authors.lastname: Jahnke
authors.forename: Predrag
authors.initials: P
authors.lastname: Ranitovic
authors.forename: C
authors.initials: C
authors.lastname: Lewis Cocke
authors.forename: Barry
authors.initials: B
authors.lastname: Walker
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Murnane
authors.forename: Henry C
authors.initials: HC
authors.lastname: Kapteyn