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The European XFEL project requires a high-speed and high-quality clock and trigger distribution system. The main clock frequency is 1.3 GHz and needs to be distributed over several kilometers of distance. At each destination several clock frequencies needs to be derived and triggers needs to be decoded. All clocks and triggers must be phase stable throughout the entire system. However, every component,...
The European X-ray Free Electron Laser experiment (XFEL) [1][2] at DESY in Hamburg will start in a few years and make possible new, impressive experiments. The whole system will require a very precise clock and trigger distribution, synchronous to the 1.3 GHz system RF-frequency, over distances of more than 3.4 km. Stockholm University in collaboration with DESY has developed a prototype for the timing...
The European XFEL project [1] requires a high-speed and high-quality clock and trigger distribution system. The main system frequency will be 1.3 GHz which will be distributed over a distance of more than 3.4 km, and all triggers will be related to it. All the clocks must have adjustable phases so that they can be kept in phase throughout the entire system. Distributing signals over such a long distance...
The European XFEL project requires a high-speed, very precise clock and timing distribution over large distances. A prototype system which fulfils current requirements that uses high-end components has just been completed and is being tested. However, the system is quite complicated and the boards are very complex, being designed using the small micro-TCA form factor. A way to simplify the system,...
Presently, a majority of Positron Emission Tomography (PET) systems is based on block-detectors consisting of many scintillating pixels read by photomultipliers (PMTs). An improvement of time resolution, due to a common light readout by a cluster of PMTs, proposed by Kuhn et al, and tested by us for an LSO crystal triggered an idea of the new PET detector optimized for the Time of Flight (TOF) systems,...
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