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The focus of this paper is the evaluation of the new fast 51 mm-diameter, 8-stage Hamamatsu R9779 photomultipliers (PMTs) with an acceleration-ring at the front-end and the Photonis XP20D0 PMTs with a screening grid in front of the anode. The following performance characteristics have been measured: timing resolution, anode-scan-uniformity and time resolution uniformity. The unfolded timing resolutions...
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