Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Ultrashort laser pulses III
Q 53.7: Talk
Thursday, March 20, 2014, 18:00–18:15, DO26 207
On-line arrival time monitor/measurement for pump-probe experiments at FLASH — •Sven Stephan1,2, Marie-Kristin Czwalinna1, Stefan Düsterer1, Leonie Flückinger3, Rosen Ivanov1, Bruno Langbehn3, Jan-Philippe Müller3, Maria Müller3, Harald Redlin1, Daniela Rupp3, Mario Sauppe3, Sebastian Schulz1, Anatoli Ulmers3, Thomas Möller3, Ulrich Teubner2,4, and Sven Toleikis1 — 1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Deutschland — 2Institut für Physik, Carl von Ossietzky Universität, Ammerländer Heerstraße 114-118, 26129 Oldenburg, Deutschland — 3Institut für Optik und Atomare Physik, TU Berlin, EW 3-1, Hardenbergstraße 36, 10623 Berlin, Deutschland — 4Institut für Lasertechnik Ostfriesland, FH Emden/Leer - University of Applied Sciences, Constantiaplatz 4, 26723 Emden, Deutschland
A limiting factor of ultrafast studies employing pump-probe techniques at free-electron lasers is the inherent jitter between optical laser and FEL pulses. Therefore, the determination of the arrival time between the two laser pulses (optical and FEL) is of utmost importance for improving the time resolution in a pump-probe experiment. We present an online diagnostic tool which allows to determine the arrival time between the two laser pulses for each shot, hereby measuring the jitter after acquiring a sufficient number of shots. This tool is based on time-resolved optical probing of the transient transmission change in a transparent, non-metal solid due to the absorption of the FEL photons.