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Characterization of a 20-inch Micro Channel Plate Photomultiplier Tube
Geonwoo Kim,Jik Lee,Hongjoo Kim 한국물리학회 2022 새물리 Vol.72 No.6
There is a proposal to construct a large neutrino detector in Korea, called Korean Neutrino Observatory (KNO), which consists of a large water tank and several tens of thousands of photosensors placed deep underground for neutrino detection. A 20-inch-diameter photosensor including a microchannel plate-photomultiplier Tube (MCP-PMT) is a candidate for the KNO due to its large photo-coverage. We characterized a 20-inch MCP-PMT by measuring its properties, including single photoelectron charge resolution, gain, signal-to-noise performance, dark count rate, after-pulse ratio, and timing performance. We present our measurements of its properties and compare them with those of a previous study.<br/>