The mass production and batch test result of the 15K 20-inch MCP-PMT in NNVT for JUNO

Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI:10.22323/1.390.0771

S. Qian, Wu Qi, Cao Yiqi, Chen Pengyu, Huang Guorui, Jin Muchun, Jin Zhen, Li Dong, L. Haitao, L. Kun, Liu Shulin, Li Zhen, Ma Lishuang, Peng Shuo, Ren Ling, Si Shuguang, Su Detan, Su Jianning, Wang Xingchao

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引用次数: 6

Abstract

The Jiangmen Underground Neutrino Observatory (JUNO) in China aiming to determine the neutrino mass hierarchy is under construction and the 15,000 MCP-PMTs produced in NNVT, which will be installed as the central liquid scintillator detector of JUNO, have been completed and delivered by August of 2020. During the mass production process, breakthrough of the photocathode technology greatly improved the quantum efficiency (QE) of the MCP-PMT from 30% to 35% and so the detection efficiency (DE) has been improved. The performance of other parameters keeps steady during the mass production process of 15,000 MCP-PMTs. The average QE at 400 nm for the 15,000 pieces of MCP-PMTs is 32%. With a layer of high-SEY material deposited on the MCP, the collection efficiency can reach nearly 100% and the average DE at 400 nm for the 15k pieces of MCP-PMTs is 31.5%.

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JUNO 15K 20英寸MCP-PMT在NNVT的量产和批量测试结果

旨在确定中微子质量等级的中国江门地下中微子天文台(JUNO)正在建设中，NNVT生产的15,000个mcp - pmt将安装为JUNO的中心液体闪烁体探测器，已于2020年8月完工并交付使用。在量产过程中，光电阴极技术的突破使MCP-PMT的量子效率(QE)从30%提高到35%，从而提高了检测效率(DE)。在15000台mcp - pmt量产过程中，其他参数的性能保持稳定。在400纳米处，15000片mcp - pmt的平均QE为32%。在MCP上沉积一层高sey材料，收集效率接近100%，15k片MCP- pmt在400 nm处的平均DE为31.5%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)

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