Performance studies of a new Russian FEU115M phototube

We report on the results of tests of FEU115M one inch phototubes manufactured in Russia. The tubes are 12-stage, fast devices with high gain and low dark current. These photomultiplier tubes were developed for the PHENIX EMCal project by members of the PHENIX group at IHEP, Protvino (Russia). We report on investigations of the gain, quantum efficiency, linearity, photocathode uniformity and long-term behavior of these tubes.<
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