2011 Particle Accelerator Conference - List of Authors (Przybylski, P.)

Paper	Title	Page
MOP293	Performance of Analog Signal Distribution in the ATCA Based LLRF System	666
	K. Czuba, L. Butkowski, S. Jabłoński, P. Przybylski, D. Sikora Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland W. Jałmużna, D.R. Makowski TUL-DMCS, Łódź, Poland T. Jezynski, F. Ludwig DESY, Hamburg, Germany
	The Low Level Radio Frequency System (LLRF) for the European X-FEL must provide exceptional stability of the accelerating RF field in the accelerating cavities. The regulation requirements of 0.01% and 0.01 degrees in amplitude and phase respectively must be achieved at a frequency of 1.3 GHz while keeping low drifts (during RF pulse). The quality of analog signal processing and distribution plays a crucial role in achieving these goals. The RF signals are connected to the Rear Transition Module (RTM), downconverted there into intermediate frequency (IF) signals and finally sampled at AMC-ADC module. The high quality of the signals (SNR, low crosstalk) must be assured across all the way. The paper presents the results of development of ATCA based LLRF system for XFEL. The special attention is paid to RTM module with downconverters and carrier board conducting analog signals to the AMC-ADC and the AMC Vector Modulator module in the presence of digital processing components (FPGA, DSP).

Paper

Title

Page

Performance of Analog Signal Distribution in the ATCA Based LLRF System

666

K. Czuba, L. Butkowski, S. Jabłoński, P. Przybylski, D. Sikora
Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
W. Jałmużna, D.R. Makowski
TUL-DMCS, Łódź, Poland
T. Jezynski, F. Ludwig
DESY, Hamburg, Germany

The Low Level Radio Frequency System (LLRF) for the European X-FEL must provide exceptional stability of the accelerating RF field in the accelerating cavities. The regulation requirements of 0.01% and 0.01 degrees in amplitude and phase respectively must be achieved at a frequency of 1.3 GHz while keeping low drifts (during RF pulse). The quality of analog signal processing and distribution plays a crucial role in achieving these goals. The RF signals are connected to the Rear Transition Module (RTM), downconverted there into intermediate frequency (IF) signals and finally sampled at AMC-ADC module. The high quality of the signals (SNR, low crosstalk) must be assured across all the way. The paper presents the results of development of ATCA based LLRF system for XFEL. The special attention is paid to RTM module with downconverters and carrier board conducting analog signals to the AMC-ADC and the AMC Vector Modulator module in the presence of digital processing components (FPGA, DSP).