title: Time-resolved pump-probe experiments at the LCLS.
abstract: The first time-resolved x-ray/optical pump-probe experiments at the SLAC Linac Coherent Light Source (LCLS) used a combination of feedback methods and post-analysis binning techniques to synchronize an ultrafast optical laser to the linac-based x-ray laser. Transient molecular nitrogen alignment revival features were resolved in time-dependent x-ray-induced fragmentation spectra. These alignment features were used to find the temporal overlap of the pump and probe pulses. The strong-field dissociation of x-ray generated quasi-bound molecular dications was used to establish the residual timing jitter. This analysis shows that the relative arrival time of the Ti:Sapphire laser and the x-ray pulses had a distribution with a standard deviation of approximately 120 fs. The largest contribution to the jitter noise spectrum was the locking of the laser oscillator to the reference RF of the accelerator, which suggests that simple technical improvements could reduce the jitter to better than 50 fs.
authors: The PULSE Institute for Ultrafast Energy Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025. USA. jglownia@slac.stanford.edu
authors: James M
authors: JM
authors: Glownia
authors: J
authors: J
authors: Cryan
authors: J
authors: J
authors: Andreasson
authors: A
authors: A
authors: Belkacem
authors: N
authors: N
authors: Berrah
authors: C I
authors: CI
authors: Blaga
authors: C
authors: C
authors: Bostedt
authors: J
authors: J
authors: Bozek
authors: L F
authors: LF
authors: DiMauro
authors: L
authors: L
authors: Fang
authors: J
authors: J
authors: Frisch
authors: O
authors: O
authors: Gessner
authors: M
authors: M
authors: Gühr
authors: J
authors: J
authors: Hajdu
authors: M P
authors: MP
authors: Hertlein
authors: M
authors: M
authors: Hoener
authors: G
authors: G
authors: Huang
authors: O
authors: O
authors: Kornilov
authors: J P
authors: JP
authors: Marangos
authors: A M
authors: AM
authors: March
authors: B K
authors: BK
authors: McFarland
authors: H
authors: H
authors: Merdji
authors: V S
authors: VS
authors: Petrovic
authors: C
authors: C
authors: Raman
authors: D
authors: D
authors: Ray
authors: D A
authors: DA
authors: Reis
authors: M
authors: M
authors: Trigo
authors: J L
authors: JL
authors: White
authors: W
authors: W
authors: White
authors: R
authors: R
authors: Wilcox
authors: L
authors: L
authors: Young
authors: R N
authors: RN
authors: Coffee
authors: P H
authors: PH
authors: Bucksbaum
mesh_terms: D004583:Electrons; D004867:Equipment Design; D007834:Lasers; D055100:Optical Fibers; D017356:Synchrotrons; D013997:Time Factors; D014965:X-Rays