Jitter-correction for IR/UV-XUV pump-probe experiments at the FLASH free-electron laser. (10th April 2017)

• Record Type: Journal Article
• Authors: Savelyev, Evgeny; Boll, Rebecca; Bomme, Cédric; Schirmel, Nora; Redlin, Harald; Erk, Benjamin; Düsterer, Stefan; Müller, Erland; Höppner, Hauke; Toleikis, Sven; Müller, Jost; Kristin Czwalinna, Marie; Treusch, Rolf; Kierspel, Thomas; Mullins, Terence; Trippel, Sebastian; Wiese, Joss; Küpper, Jochen; Brauβe, Felix; Krecinic, Faruk; Rouzée, Arnaud; Rudawski, Piotr; Johnsson, Per; Amini, Kasra; Lauer, Alexandra; Burt, Michael; Brouard, Mark; Christensen, Lauge; Thøgersen, Jan; Stapelfeldt, Henrik; Berrah, Nora; Müller, Maria; Ulmer, Anatoli; Techert, Simone; Rudenko, Artem; Rolles, Daniel;
• Is Part Of: New journal of physics. Volume 19:Number 4(2017:Apr.)
• Publication Date: 2017-04-10
• Subjects: free-electron laser -- pump-probe experiments -- photodissociation -- velocity map imaging -- time-resolved ion imaging; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aa652d
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: 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 (C6 H3 F2 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.