Jezynski, T.

Paper	Title	Page
WEB006	Demonstration of an ATCA Based LLRF Control System at FLASH	388
	S. Simrock, M. K. Grecki, T. Jezynski, W. Koprek DESY, Hamburg L. Butkowski, W. Jalmuzna, D. R. Makowski, A. Piotrowski TUL-DMCS, Łódź K. Czuba Warsaw University of Technology, Institute of Electronic Systems, Warsaw
	Future RF Control systems will require simultaneuous data acquisition of up to 100 fast ADC channels at sampling rates of around 100 MHz and real time signal processing within a few hundred nanoseconds. At the same time the standardization of low-level systems are common objectives for all laboratories for cost reduction, performance optimization and machine reliability. Also desirable are modularity and scalability of the design as well as compatibility with accelerator instrumentation needs including the control system. All these requirements can be fulfilled with the new telecommunication standard ATCA when adopted to the domain of instrumentation. We describe the architecture and design of an ATCA based LLRF system for the European XFEL. Initial results of the demonstration of such a system at the FLASH user facility will be presented.
	Slides
WEP051	Acquisition of Analog Signals in ATCA based LLRF Control System for X-FEL	1
	T. Jezynski, M. K. Grecki, W. Koprek, S. Simrock DESY, Hamburg W. Jalmuzna, D. R. Makowski TUL-DMCS, Łódź
	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 module in the presence of digital processing components (FPGA, DSP).