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Proceedings Paper

Femtosecond-precision synchronization of the pump-probe optical laser for user experiments at FLASH
Author(s): S. Schulz; M. K. Czwalinna; M. Felber; P. Prędki; S. Schefer; H. Schlarb; U. Wegner
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Paper Abstract

In this paper, we present the long-term stable synchronization of the FLASH pump-probe Ti:sapphire oscillator to an optical reference with sub-10 fs (rms) timing jitter employing a balanced optical cross-correlator. The reference pulse train, transmitted over an actively transit time-stabilized 500m long fiber link, is generated by the FLASH master laser oscillator. This laser also provides the reference for several electron bunch arrival time monitors with sub-10 fs resolution, which in turn enables a longitudinal feedback reducing the electron bunch arrival time jitter to below 25 fs (rms). Combining the precise synchronization of the laser and the longitudinal accelerator feedback enabled a proof-of-principle pump-probe experiment at FLASH, ultimately showing a significant reduction of the timing jitter between the optical laser and the XUV pulses generated by the FEL, compared to the present standard operation.

Paper Details

Date Published: 3 May 2013
PDF: 9 pages
Proc. SPIE 8778, Advances in X-ray Free-Electron Lasers II: Instrumentation, 87780R (3 May 2013); doi: 10.1117/12.2021572
Show Author Affiliations
S. Schulz, Deutsches Elektronen-Synchrotron (Germany)
M. K. Czwalinna, Deutsches Elektronen-Synchrotron (Germany)
M. Felber, Deutsches Elektronen-Synchrotron (Germany)
P. Prędki, Technical Univ. of Łódz (Poland)
S. Schefer, Univ. Hamburg (Germany)
H. Schlarb, Deutsches Elektronen-Synchrotron (Germany)
U. Wegner, Deutsches Elektronen-Synchrotron (Germany)

Published in SPIE Proceedings Vol. 8778:
Advances in X-ray Free-Electron Lasers II: Instrumentation
Thomas Tschentscher; Kai Tiedtke, Editor(s)

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