TY  - CONF
AU  - Janas, Ewa
AU  - Kownacki, Przemyslaw
AU  - Czwalinna, Marie Kristin
AU  - Felber, Matthias
AU  - Lamb, Thorsten
AU  - Schlarb, Holger
AU  - Schulz, Sebastian
AU  - Sydlo, Cezary
AU  - Titberidze, Mikheil
AU  - Zummack, Falco
AU  - Czuba, Krzysztof
AU  - Sikora, Dominik
AU  - Szewinski, Jaroslaw
TI  - Design and Integration of the Optical Reference Module at 1.3 GHz for FLASH and the European XFEL
CY  - Geneva
PB  - JACoW, Geneva, Switzerland
M1  - DESY-2014-03399
SN  - 978-3-95450-132-8
SP  - 2768-2770
PY  - 2014
AB  - In this paper we present recent progress on the integration and implementation of the optical reference module (REFM-OPT) for the free-electron lasers FLASH and European XFEL. In order to achieve high energy stability and low arrival time jitter of the electron beam, the accelerator requires an accurate low-level RF (LLRF) field regulation and a sophisticated synchronization scheme for various devices along the facility. The REFM-OPT is a 19” module which is responsible for resynchronizing the 1.3 GHz reference signal for the LLRF distributed by coaxial cables to a phase-stable signal of the optical synchronization system. The module provides a 1.3 GHz output signal with low phase noise and high long-term stability. Several sub-components of the REFM-OPT designed specifically for this module are described in detail. The readout electronics of the high-precision Laser-to-RF phase detector are presented as well as the integration of this key component into the 19” module. Additionally, we focus on design solutions which assure phase stability and synchronization of the 1.3 GHz signal at several high power outputs of the module.
T2  - 5th International Particle Accelerator Conference
CY  - 15 Jun 2014 - 20 Jun 2014, Dresden (Germany)
Y2  - 15 Jun 2014 - 20 Jun 2014
M2  - Dresden, Germany
KW  - Accelerator Physics (Other)
KW  - 07 Accelerator Technology Main Systems (Other)
KW  - T24 Timing and Synchronization (Other)
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.18429/JACoW-IPAC2014-WEPRI115
UR  - https://bib-pubdb1.desy.de/record/171858
ER  -