title: Characterization of a two-color pump-probe setup at FLASH using a velocity map imaging spectrometer.
abstract: We report on the implementation of a high-count-rate charged particle imaging detector for two-color pump-probe experiments at the free electron laser in Hamburg (FLASH). In doing so, we have developed a procedure for finding the spatial and temporal overlap between the extreme UV free electron laser (FEL) pulses and the IR pulses, which allows for complete alignment of the setup in situations where the region of overlap between the FEL and the IR is not easily accessible by means of imaging optics.
authors.affiliation: Foundation for Fundamental Research on Matter-Institute for Atomic and Molecular Physics, Science Park 104, 1098 XG Amsterdam, The Netherlands. per.johnsson@fysik.lth.se
authors.forename: P
authors.initials: P
authors.lastname: Johnsson
authors.forename: A
authors.initials: A
authors.lastname: Rouzée
authors.forename: W
authors.initials: W
authors.lastname: Siu
authors.forename: Y
authors.initials: Y
authors.lastname: Huismans
authors.forename: F
authors.initials: F
authors.lastname: Lépine
authors.forename: T
authors.initials: T
authors.lastname: Marchenko
authors.forename: S
authors.initials: S
authors.lastname: Düsterer
authors.forename: F
authors.initials: F
authors.lastname: Tavella
authors.forename: N
authors.initials: N
authors.lastname: Stojanovic
authors.forename: H
authors.initials: H
authors.lastname: Redlin
authors.forename: A
authors.initials: A
authors.lastname: Azima
authors.forename: M J J
authors.initials: MJ
authors.lastname: Vrakking