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Impact of seismic activities on the optical synchronization system of the European X-ray free-electron laser
Citation Link: https://doi.org/10.15480/882.14974
Publikationstyp
Journal Article
Date Issued
2025-03-05
Sprache
English
TORE-DOI
Citation
High Power Laser Science and Engineering (in Press): (2025)
Publisher DOI
Scopus ID
This study investigates the influence of seismic activities on the optical synchronization system of the European X-ray Free-Electron Laser. We analyze the controller I/O data of phase-locked-loops in length-stabilized links, focusing on the response to earthquakes, ocean-generated microseism and civilization noise. By comparing the controller data with external data, we were able to identify disturbances and their effects on the control signals. Our results show that seismic events influence the stability of the phase-locked loops. Even earthquakes that are approximately 5000 km away cause remarkable fluctuations in the in-loop control signals. Ocean-generated microseism in particular has an enormous influence on the in-loop control signals due to its constant presence. The optical synchronization system is so highly sensitive that it can even identify vibrations caused by civilization, such as road traffic or major events like concerts or sport events. The phase-locked loops manages to eliminate more than 99 % of the existing interference.
Subjects
Control | Data analysis | Optical synchronization | Synchronization of large accelerator facilities
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
impact-of-seismic-activities-on-the-optical-synchronization-system-of-the-european-x-ray-free-electron-laser.pdf
Type
Main Article
Size
25.14 MB
Format
Adobe PDF