Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser

Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser

In 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 ex...

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Bibliographic Details
Main Authors: Savelyev, E, Boll, R, Bomme, C, Schirmel, N, Redlin, H, Erk, B, Düsterer, S, Müller, E, Höppner, H, Toleikis, S, Müller, J, Kristin Czwalinna, M, Treusch, R, Kierspel, T, Mullins, T, Trippel, S, Wiese, J, Küpper, J, Brauβe, F, Krecinic, F, Rouzée, A, Rudawski, P, Johnsson, P, Amini, K, Lauer, A, Burt, M, Brouard, M, Christensen, L, Thøgersen, J, Stapelfeldt, H, Berrah, N, Müller, M, Ulmer, A, Techert, S, Rudenko, A, Rolles, D
Format: Journal article
Published: IOP Publishing 2017
Description
Summary:In 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 (C<sub>6</sub>H<sub>3</sub>F<sub>2</sub>I) 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.

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