Mixing plant for JUNO liquid scintillator: Design, construction, installation and commissioning
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2026
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| author | Shao, Junyu Li, Wenjie Sun, Xilei Hu, Tao Zhou, Li Ding, Yayun Cai, Xiao Yu, Boxiang Fang, Jian Xie, Yuguang Zhao, Jie Sun, Lijun Liu, Wanjin Sun, Hansheng Liu, Mengchao Ling, Xin |
| author_facet | Shao, Junyu Li, Wenjie Sun, Xilei Hu, Tao Zhou, Li Ding, Yayun Cai, Xiao Yu, Boxiang Fang, Jian Xie, Yuguang Zhao, Jie Sun, Lijun Liu, Wanjin Sun, Hansheng Liu, Mengchao Ling, Xin |
| contents | The most challenging part of building the Jiangmen Underground Neutrino Observatory (JUNO) is the production of 20 kilotons of ultra pure Liquid Scintillator (LS). This paper presents the design, construction, installation, and commissioning of the LS Mixing Plant, a core facility dedicated to blending the primary organic solvent (LAB) with essential functional solutes (PPO, bis-MSB, and BHT). The main purpose of the Mixing Plant is to prepare and purify the concentrated Master Solution (MS) to achieve a low radioactive contamination background. The amount of radioactive contaminants in the MS are lowered by approximately two orders of magnitude after acid and water extraction, followed by a multi-stage filtration procedure. The purified MS is mixed with LAB and then diluted into the LS for JUNO experiments. Commissioning results of the LS verify that the Mixing Plant achieved its design goal, delivering ultra pure LS that satisfies the stringent radiopurity requirements for neutrino physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_15525 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Mixing plant for JUNO liquid scintillator: Design, construction, installation and commissioning Shao, Junyu Li, Wenjie Sun, Xilei Hu, Tao Zhou, Li Ding, Yayun Cai, Xiao Yu, Boxiang Fang, Jian Xie, Yuguang Zhao, Jie Sun, Lijun Liu, Wanjin Sun, Hansheng Liu, Mengchao Ling, Xin Instrumentation and Detectors The most challenging part of building the Jiangmen Underground Neutrino Observatory (JUNO) is the production of 20 kilotons of ultra pure Liquid Scintillator (LS). This paper presents the design, construction, installation, and commissioning of the LS Mixing Plant, a core facility dedicated to blending the primary organic solvent (LAB) with essential functional solutes (PPO, bis-MSB, and BHT). The main purpose of the Mixing Plant is to prepare and purify the concentrated Master Solution (MS) to achieve a low radioactive contamination background. The amount of radioactive contaminants in the MS are lowered by approximately two orders of magnitude after acid and water extraction, followed by a multi-stage filtration procedure. The purified MS is mixed with LAB and then diluted into the LS for JUNO experiments. Commissioning results of the LS verify that the Mixing Plant achieved its design goal, delivering ultra pure LS that satisfies the stringent radiopurity requirements for neutrino physics. |
| title | Mixing plant for JUNO liquid scintillator: Design, construction, installation and commissioning |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2605.15525 |