Savelyev, EvgenyBoll, RebeccaBomme, CédricSchirmel, NoraRedlin, HaraldErk, BenjaminDüsterer, StefanMüller, ErlandHöppner, HaukeToleikis, SvenMüller, JostCzwalinna, Marie KristinTreusch, RolfKierspel, ThomasMullins, TerenceTrippel, SebastianWiese, JossKüpper, JochenBrauβe, FelixKrecinic, FarukRouzée, ArnaudRudawski, PiotrJohnsson, PerAmini, KasraLauer, AlexandraBurt, MichaelBrouard, MarkChristensen, LaugeThøgersen, JanStapelfeldt, HenrikBerrah, NoraMüller, MariaUlmer, AnatoliTechert, SimoneRudenko, ArtemRolles, Daniel2023-12-072023-12-072017-04-01https://hdl.handle.net/2097/44006In pump-probe experiments employing a free-electron laser (FEL) in combination with a synchronized optical femtosecond laser, the arrival-time jitter between the FEL pulse and the optical laser pulse often severely limits the temporal resolution that can be achieved. Here, we present a pump-probe experiment on the UV-induced dissociation of 2,6-difluoroiodobenzene (C6H3F2I) molecules performed at the FLASH FEL that takes advantage of recent upgrades of the FLASH timing and synchronization system to obtain high-quality data that are not limited by the FEL arrival-time jitter. We discuss in detail the necessary data analysis steps and describe the origin of the time-dependent effects in the yields and kinetic energies of the fragment ions that we observe in the experiment.Creative Commons Attribution 3.0 licencehttps://creativecommons.org/licenses/by/3.0/Text