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@inproceedings{schuette:ipac2021-tupab291,
author = {M. Schütte and A. Eichler and T. Lamb and V. Rybnikov and H. Schlarb and T. Wilksen},
title = {{Subsystem Level Data Acquisition for the Optical Synchronization System at European XFEL}},
booktitle = {Proc. IPAC'21},
pages = {2167--2169},
eid = {TUPAB291},
language = {english},
keywords = {FEL, controls, laser, data-acquisition, database},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-TUPAB291},
url = {https://jacow.org/ipac2021/papers/tupab291.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB291},
abstract = {{The optical synchronization system for the European X-Ray Free-Electron Laser provides sub-10 femtosecond timing precision * for the accelerator subsystems and experiments. This is achieved by phase locking a mode-locked laser oscillator to the main RF reference and distributing the optical pulse train carrying the time information via actively propagation-time stabilized optical fibers to multiple end-stations. Making up roughly one percent of the entire European XFEL, it is the first subsystem to receive a large-scale data acquisition system [2] for storing not just hand-selected information, but in fact all diagnostic, monitoring, and configuration data relevant to the optical synchronization available from the distributed control system infrastructure. A minimum of 100 TB per year may be stored in a persistent archive for long-term health monitoring and data mining whereas excess data is stored in a short-term ring buffer for high-resolution fault analysis and feature extraction algorithm development. This paper describes scale, challenges and first experiences from the optical synchronization data acquisition system.}},
}