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The Train Builder is an Advanced Telecom ATCA based custom data acquisition system designed to provide a common readout system for the large 2D Mega-pixel detectors presently under construction for the European-XFEL facility in Hamburg.Each detector outputs 10 GBytes/sec of raw data over multiple 10 Gbps SFP+ optical links.The Train Builder DAQ system will merge detector link image fragments from up to 512 X-ray pulses in each pulse train and send the complete detector "movies" of images to a farm of PCs.The image building will be carried out using FPGAs with analogue Crosspoint switches operating in a barrel shift mode.The Train Builder data links will operate with 10G UDP&TCP/IP based protocols implemented in FPGA logic.
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Coughlan et al. (2011) studied this question.
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