Master Oscillator for the European XFEL

Zembala, Lukasz; Sikora, Dominik; Branlard, Julien; Schlarb, Holger; Gasowski, Bartosz; Czuba, Krzysztof; Weddig, Henning-Christof

doi:10.18429/JACoW-IPAC2014-WEPRI116

Contribution to a conference proceedings/Contribution to a book

DESY-2014-03395

Master Oscillator for the European XFEL

Zembala, L. (Corresponding author)DESY* ; Czuba, K.DESY* ; Gasowski, B.Extern* ; Sikora, D.DESY* ; Branlard, J.DESY* ; Schlarb, H.DESY* ; Weddig, H.-C.DESY*

2014
JACoW, Geneva, Switzerland Geneva
ISBN: 978-3-95450-132-8

Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany
5th International Particle Accelerator Conference, IPAC'14, Dresden, Germany, 15 Jun 2014 - 20 Jun 2014 Geneva : JACoW, Geneva, Switzerland 2771-2773 (2014) [10.18429/JACoW-IPAC2014-WEPRI116]

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Please use a persistent id in citations: doi:10.18429/JACoW-IPAC2014-WEPRI116

Abstract: The reference signal outage causes breakdown of the synchronisation in the entire accelerator, which could result in a multi-day break in the operation. Therefore, the Master Oscillator (MO) for the European XFEL has to be redundant, in order to achieve extremely high reliability. The redundancy concept, which provides no interruption in the reference signal, requires phase coherence, fast RF switching and sustaining the RF power with a high-Q filter. These features allow to keep possible signal transitions smooth. Furthermore, the MO has to generate a 1.3 GHz signal of exceptionally good phase noise performance – jitter < 35 fs RMS integrated from 10 Hz to1 MHz. One of the problems in the way are vibrations, which have to be properly isolated to avoid microphonics effects in oscillators. The proposed MO architecture and connection with the RF distribution system is described. A basic prototype is tested and results are presented.

Keyword(s): Accelerator Physics ; 07 Accelerator Technology Main Systems ; T24 Timing and Synchronization

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