9-15 June 2018
Woodlands Conference Center
America/New_York timezone
**** See you at Real Time 2020 ****

First large-scale real-time drift compensation for Low-Level-RF-stations at the European XFEL

12 Jun 2018, 14:40
1h 30m
Woodlands Conference Center

Woodlands Conference Center

159 Visitor Center Dr, Williamsburg, VA 23185
Poster presentation Control, Monitoring,Test and Real Time Diagnostics Systems Poster 1


Krzysztof Czuba (Warsaw University of Technology)


For a reliable and robust operation of free-electron lasers with bunch-arrival time variations on the sub-10fs scale, the short-term and long-term RF stability of the cavity field is a crucial factor. The long-term RF stability depends mainly on temperature and humidity changes acting on various electronic subcomponents of the accelerator. For the European XFEL we used a drift compensation module operating at 1.3GHz to remove long-term amplitude and phase variations of the MicroTCA.4 Low-Level-RF control system on the fs-scale. The module showed excellent suppression of environmental temperature and humidity changes of about two magnitudes down to an amplitude and phase stability of 0.01%, respectively 0.01deg or 20fs (all peak-to-peak values). In this article we present the method, hardware, performance and operation of the module.

Minioral Yes
Description uTCA for LLRF
Institute Warsaw University of Technology
Speaker Krzysztof Czuba
Country Poland

Primary authors

Jan Piekarski (Warsaw University of Technology) Guenter Moeller (DESY) Dr Matthias Hoffmann (Deutsches Elektronen-Synchrotron) Dr Frank Ludwig (Deutsches Elektronen-Synchrotron) Holger Schlarb (DESY) Dr Christian Schmidt (Deutsches Elektronen-Synchrotron) Dr Uros Mavric (DESY) Krzysztof Czuba (Warsaw University of Technology) Mr Bin Yang (Deutsches Elektronen-Synchrotron)

Presentation Materials

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