Speaker
Björn Lautenschlager
(DESY)
Description
For pump-probe experiments, where the FEL photon pulses interact together with an external laser, a highly temporal stability is mandatory. The longitudinal beam-based feedback system at the European XFEL stabilizes the arrival time, measured by a bunch arrival time monitor (BAM). To compensate fast arrival time fluctuations of the bunch trains, the energy in front of a bunch compression chicane is modulated by the low level RF (LLRF) system of the superconducting RF (SRF) cavities. Measurements at the EuXFEL shows train-to-train arrival time stabilities down to the sub-10 fs level if the longitudinal intra bunch-train feedback (L-IBFB) is activated at the LLRF system.
Primary authors
Björn Lautenschlager
(DESY)
Christian Schmidt
(DESY)
Holger Schlarb
(DESY)
Jiri Kral
(DESY)
Julien Branlard
(DESY)
Marie Kristin Czwalinna
(Deutsches Elektronen-Synchrotron)
Sebastian Schulz
(DESY)
Sven Pfeiffer
(DESY)
