Jul 4 – 11, 2018
Asia/Seoul timezone

Signal optimization and study of the JUNO 20-inch PMT with high-voltage divider

Jul 6, 2018, 6:30 PM


Poster Neutrino Physics POSTER


Dr fengjiao Luo (Institute of High Energy Physics,CAS)


The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector with primary physics goal of neutrino mass hierarchy determination. One of the key parameters is that the energy resolution of the JUNO should reach 3%@1MeV, totally 20,000 20’’ PMTs will be used, including 15000 MCP-PMTs from NNVT and 5000 dynode PMTs from Hamamatsu. For better performances and higher stability, the PMT will be optimized with high-voltage divider. In this work, we will show the design and study of the PMT high-voltage divider and the optimized signal about the overshoot and ringing following the positive HV scheme. We have controlled the overshoot to less than ~1% of the signal amplitude; especially, for MCP-PMTs, we have optimized the HV divider for the collection efficiency, and the time properties of the waveform. More other related parameters also will be presented.

Primary author

Dr fengjiao Luo (Institute of High Energy Physics,CAS)

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