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