Evaluation of new large area PMT with high quantum efficiency

• 作 者: 雷祥翠 衡月昆 钱森 夏经铠 刘术林 吴智 闫保军 徐美杭 王铮 李小男 阮向东 王小状 杨玉真 王文文 方灿 罗凤姣 梁静静 杨露萍 杨彪
• 机 构: State Key Laboratory of Particle Detection and Electronics,Institute of High Energy Physics,Chinese
• 出 处: Chinese Physics C
• 发表日期: 2016年02期
• 关键词: photoelectron Photonics correction spread latitude tungsten anode fitting cathod

The neutrino detector of the Jiangmen Underground Neutrino Observatory(JUNO) is designed to use20 kilotons of liquid scintillator and approximately 16000 20 inch photomultipliers(PMTs).One of the options is to use the 20 inch R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics.The performance of the newly developed PMT preproduction samples is evaluated.The results show that its quantum efficiency is 30%at 400 nm.Its Peak/Valley(P/V) ratio for the single photoelectron is 4.75 and the dark count rate is 27 kHz at the threshold of 3 mV while the gain is at 1 × 10~7.The transit time spread of a single photoelectron is 2.86 ns.Generally the performances of this new 20 inch PMT are improved over the old one of R3600.

The neutrino detector of the Jiangmen Underground Neutrino Observatory (JUNO) is designed to use 20 kilotons of liquid scintillator and approximately 16000 20 inch photomultipliers (PMTs). One of the options is to use the 20 inch R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics. The performance of the newly developed PMT preproduction samples is. The results show that its quantum efficiency is 30% at 400 nm. Peak Peak / Valley (P / V) ratio for the single photoelectron is 4.75 and the dark count rate is 27 kHz at the threshold of 3 mV while the gain is at 1 × 10 ~ 7. The transit time spread of a single photoelectron is 2.86 ns.Generally the performances of this new 20 inch PMT are improved over the old one of R3600.