Sub-50 fs temporal resolution in an FEL-optical laser pump-probe experiment at FLASH2.

Autor: Atia-Tul-Noor, Kumar S, Schirmel N, Erk B, Manschwetus B, Alisaukas S, Braune M, Cirmi G, Czwalinna MK, Frühling U, Grosse-Wortmann U, Kschuev N, Kuschewski F, Lang T, Lindenblatt H, Litvinyuk I, Meister S, Moshammer R, Papadopoulou CC, Passow C, Roensch-Schulenburg J, Trost F, Hartl I, Düsterer S, Schulz S
Jazyk: angličtina
Zdroj: Optics express [Opt Express] 2024 Feb 12; Vol. 32 (4), pp. 6597-6608.
DOI: 10.1364/OE.513714
Abstrakt: High temporal resolution is essential for ultra-fast pump-probe experiments. Arrival time jitter and drift measurements, as well as their control, become critical especially when combining XUV or X-ray free-electron lasers (FELs) with optical lasers due to the large scale of such facilities and their distinct pulse generation processes. This paper presents the application of a laser pulse arrival time monitor that actively corrects the arrival time of an optical laser relative to the FEL's main optical clock. Combined with post-analysis single pulse jitter correction this new approach improves the temporal resolution for pump-probe experiments significantly. Benchmark measurements on photo-ionization of xenon atoms performed at FLASH beamline FL26, demonstrate a sub-50 fs FWHM overall temporal resolution.
Databáze: MEDLINE