title: Picosecond time-resolved laser pump/X-ray probe experiments using a gated single-photon-counting area detector.
abstract: The recent developments in X-ray detectors have opened new possibilities in the area of time-resolved pump/probe X-ray experiments; this article presents the novel use of a PILATUS detector to achieve X-ray pulse duration limited time-resolution at the Advanced Photon Source (APS), USA. The capability of the gated PILATUS detector to selectively detect the signal from a given X-ray pulse in 24 bunch mode at the APS storage ring is demonstrated. A test experiment performed on polycrystalline organic thin films of alpha-perylene illustrates the possibility of reaching an X-ray pulse duration limited time-resolution of 60 ps using the gated PILATUS detector. This is the first demonstration of X-ray pulse duration limited data recorded using an area detector without the use of a mechanical chopper array at the beamline.
authors.affiliation: Danish National Research Foundation Centre for Molecular Movies, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark. ejdrup@fys.ku.dk
authors.forename: T
authors.initials: T
authors.lastname: Ejdrup
authors.forename: H T
authors.initials: HT
authors.lastname: Lemke
authors.forename: K
authors.initials: K
authors.lastname: Haldrup
authors.forename: T N
authors.initials: TN
authors.lastname: Nielsen
authors.forename: D A
authors.initials: DA
authors.lastname: Arms
authors.forename: D A
authors.initials: DA
authors.lastname: Walko
authors.forename: A
authors.initials: A
authors.lastname: Miceli
authors.forename: E C
authors.initials: EC
authors.lastname: Landahl
authors.forename: E M
authors.initials: EM
authors.lastname: Dufresne
authors.forename: M M
authors.initials: MM
authors.lastname: Nielsen
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D010783:Photometry / Q000295:instrumentation*; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers; D014961:X-Ray Diffraction / Q000295:instrumentation*